Tables Design Help
May 13, 2007
I used to get flat files which i need to import into tables..
The flat files data which contains.....
How should i design the tables so that i can get the output in single row...
Table1ForRow1
--------------
col1,100
col2,1
col3,xx
col4,yy
col5,,,
col6,20030101
Table1ForRow2
-------------
col1,100
col2,2
col3,20030101
Table1ForRow3
------------
col1,100
col2,3
col3,01
col4,20030101
FlatFiledata:
------------
100,1,xx,yy,,20030101
100,2,20030101
100,3,01,20030101
I want the output:
100,1,xx,yy,20030101,2,3,01
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Feb 5, 2005
I'm grappling with this design problem right now:
I have a table of users. Every user has an e-mail address and (hashed) password. Some of those users work for a company, and some of them do not. Of those who do not work for a company, some are salespeople who sell to one or more companies. Some users are simply administrators who don't work for a specific company. So here's what my users table looks like right now: "UserID, Email, Password, CompanyID (Nullable), IsAdmin"
And here's my companies table: "CompanyID, CompanyName, SalespersonID"
Of course, I could separate it out and make a Users table, an Employees table, and a Salespeople table. The way the relationship works out, though, I could use the same ID number for all three tables, and that indicates to me that perhaps they all belong in the same table. It seems silly, after all to have a Salespeople table whose only field is "UserID."
Two factors of the first design concern me: First is the fact that a salesperson could also have a company. I guess I could write a check constraint to prevent this, but doesn't having the companyID in the Users table violate a normalization rule? Maybe? The second is the fact that the Companies table relies upon Users, which in turn relies upon Companies. In OOP, this usually isn't a good thing, but I'm not sure whether it's cause for concern in a relational database.
Anyway, I really don't know what I should be doing with this design. Any suggestions?
Thanks in advance,
-Starwiz
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Jul 23, 2005
I have an applicaton in which I collect data for different parametersfor a set of devices. The data are entered into a single table, eachset of name, value pairs time-stamped and associated with a device.The definition of the table is as follows:CREATE TABLE devicedata(device_idintNOT NULL REFERENCES devices(id),-- id in the devicetabledatetimedatetimePRIMARY KEY CLUSTERED,-- date creatednamenvarchar(256)NOT NULL,-- name of the attributevaluesql_variantNOT NULL-- value)For example, I have 3 devices, and each is monitored for two attributes-- temperature and pressure. Data for these are gathered at say every20 minute and every 15 minute intervals.The table is filled with records over a period of time, and I canperform a variety of SQL queries.I have another requirement which requires me to retrieve the *latest*values of temperature and pressure for each device.Ideally, I'd like to use the data I have collected to get thisinformation, and I suppose I can.What I need is the SELECT statement to do this.I'd appreciate it very much, if someone can help provide that.Conceivably, I could use a SQL server View for making this easier forsome of my users.One alternate technique I thought was to create another table which I*update* with the latest value, each time I *insert* into the abovetable. But it seems like a waste to do so, and introduces needlessreferential integrity issues (minor). Maybe for fast access, that isthe best thing to do.I have requirements to maintain this data for several months/year ortwo, so I am dealing with a large number of samples.Any help would be appreciated.(I apologize if this post appears twice)
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Jul 20, 2005
Dear sirI have one SQL Server database.In this database more than 20 tables existsthat their structures is same.I have two way for design this tables:1.Create all tables separately(create more than 20 tables)2.Create one table and separate each groupby type(add column type to table and assign samevalue for each group)What is better solution?Please help me.*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
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Dec 28, 2005
I am developing a Content management system of sorts and I want it
to be pretty flexible. I have noticed that with web content (News,
Articles, Events, FAQs) that there is a lot of similarity between these
items. They all have the same basic fields:
TitleSynopsisBodyStartDateEndDate
(for News, Articles, FAQs start and end date can be used for content
expiration. For events, they are used for the actual event dates.)
But for some types of content, I will need fields specific to that
type. For instance, I want to have a few custom settings for a "Photo
Gallery" type, like, how many rows/columns of thumbnails to display per
page.
I feel like I have 3 options, but would really appreciate your advice. I created diagrams for the 3 options, located here: http://nontalk.com/dbdesign/
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Jan 18, 2008
I'm designing a database with 3 tables called Function, Test andScene.A Function has multiple Tests, but a Test has only one Function. Amany to many relationship exists between Test and Scene therefore Ineed a junction table between these two tables - giving 4 tables intotal. The Test table would store a foreign key, the primary key ofthe Function table.There is a problem with design though and that is that Functions andScenes are actually defined before the Test is defined. Therefore itshould be possible to create a Function and add to id its Scenes,before Tests have been defined. In other words, Scenes are as much apart of a Function as they are of Tests. Tests are in fact only ofrelavence to testers. Anyway, to satisfy this scenario, a Junction boxis also needed beween Function and Scene. This creates a loop betweenall tables.Is this a good approach? Any other suggestions or advice on thematter? Any advice regarding data integrity?Thanks,Barry
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Jul 20, 2005
i am a beginner of database design, could anyone please help me tofigure out how to make these two tables work.1) a "players" table, with columns "name", "age"2) a "teams" table, which can have one OR two player(s)a team also has a column "level", which may have values "A", "B",or "C"how do you build the "teams" table (the critical question is "do ineed to create two fields" for the maximum two possible players?")how do you use one query to display the information with the followingcolumns:"name", "age", "levelA", "levelB", "levelC" (the later three columnsare integer type, showing how many teams with coresponding level thisplayer is in).now suppose i don't have any access to sql server, i save the datainto xml, and load it into a dataset. how could you do the selectionwithin the dataset? or ahead of that, how do you specify the relationsbetween "players" and "teams".the following is the schema file i am trying to make (I still don'tknow if i need to specified the primary key... and how to buildrelation between them):<code><?xml version="1.0" ?><xs:schema id="AllTables" xmlns=""xmlns:xs="http://www.w3.org/2001/XMLSchema"xmlns:msdata="urn:schemas-microsoft-com:xml-msdata"><xs:element name="AllTables" msdata:IsDataSet="true"><xs:complexType><xs:choice maxOccurs="unbounded"><xs:element name="Players"><xs:complexType><xs:sequence><xs:element name="PlayerID" msdata:AutoIncrement="true"type="xs:int" minOccurs="0" /><xs:element name="Name" type="xs:string" minOccurs="0" /><xs:element name="Age" type="xs:int" minOccurs="0" /></xs:sequence></xs:complexType></xs:element><xs:element name="Teams"><xs:complexType><xs:sequence><xs:element name="TeamID" msdata:AutoIncrement="true"type="xs:int" minOccurs="0" /><xs:element name="Level" type="xs:string" minOccurs="0" /><xs:element name="Player1" type="xs:int" minOccurs="0" /><xs:element name="Player2" type="xs:int" minOccurs="0" /></xs:sequence></xs:complexType></xs:element></xs:choice></xs:complexType></xs:element></xs:schema></code>
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Feb 28, 2008
Hi,
Currently i am developing a job portal in ASP 2.0, SQL Server 2005 which involves Job Seeker registration, Searching of resumes, applying for job Posting, Employer Registration, Create Job Posting, Searching for Job Seeker etc.
The Job Seeker is allowed to upload a word document of size up to 500Kb which is stored in Table as varbinary.
Right now I have MemberShip/Roles in seperate database. The Job Portal Tables are in seperate Database. I was told to split the Tables so that Tables of JobSeeker are One database and Employer to another Database so that they speed up the performance.
I have several tables that bridge (thats either store id's of Job Seeker or Employer) like Job Postings applied, Saved Postings Job Seeker, Job Postings of the Employer, Job Posting (Applied ones) alert etc.
Can any give me how to create a good Database design (one or more) with excellent performation. Right now I have one Database for Job Portal related tables excluding membership. The mapping of key fields including the fields that are enabled for Text indexing are given below.
(JobSeekerTable - Stores Personal Details)
JobSeekerId (PK)
...............
(JobSeekerResumeTable - Stores Resume Details)
JobSeekerResumeId (PK)
JobSeekerId (FK)
Job Title (enabled Text Indexing)
........
(JobSeekerDocTable - Stores Resume Details)
JobSeekerDocId (PK)
JobSeekerId (FK)
Resume (as varbinary) (enabled Text Indexing)
Covering Letter (Text)
........
(JobSeekerPostingTable - Stores Job Postings Saved by the Job Seeker)
JobSeekerPostingId(PK)
JobSeekerId (FK)
JobPostingId (FK)
......
(JobSeekerAppliedTable - Stores Job Postings Applied by the Job Seeker)
JobSeekerAppliedId(PK)
JobSeekerId (FK)
JobPostingId (FK)
.....
(CompanyTable - Employer Details)
CompanyId(PK)
.....
(JobPostingTable - Stores the information of the Job Posting created by Employer)
JobPostingId(PK)
CompanyId(FK)
Job Title (enabled Text Indexing)
Job Desc(enabled Text Indexing)
.....
(JobPostingConTable - Stores the information of the Job Posting Location Details )
JobPostingConId(PK)
JobPostingId(FK)
.....
(CompResumeSaved - Job Seeker details saved by Employer)
CompResumeSaved(PK)
CompanyId(FK)
JobSeekerId(FK)
.....
Eventually more tables would be added. Can any one tell me how to speed up the performance (particulary search engine fo Employer for searching resumes & Jobseeker for searching job Postings.) I hope I have mentioned everything clearly.
Thanks,
Uma Ramiya
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Jun 10, 2015
I have 3 tables (accnt, jobcost, and servic15). all with the same fields (code, jno, ven, date). I need to insert the data from these tables into another table called dummy with the same fields, in one statement or query.
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Jan 4, 2006
I have a general SQL design-type question.
I want to log errors to a table. If the error is with a URL, I want to store the URL. These URLs can be very large, hundreds of characters, but I only need to store it if it causes the error, which should be very infrequent. Which is the better design:
Create a large varchar field in the log table to hold the URL, or null if the error wasn't with the URL.
Create a foreign key field in the log table to a second URL table, which has a unique ID and a large varchar, and only create a record in this table if the error is with the URL.
One concern I have with design 2 is that there could be many other fields that are infrequent. Do I create a separate table for every one?
Richard
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Sep 19, 2000
I want to have a linking table say for example we call this a claim. Based on the claim number you need to relate to one of say 6 different types of claims. The types of claims related to their own individual parent table. (individual because each type of claim tracks completely different information) does anyone have an idea on how to set this up?
Sample Structure
table = Claim
Field 1 = ClaimTypeA_ID
Field 2 = ClaimTypeB_ID
Field 3 = ClaimTypeC_ID
Field 4 = ClaimTypeD_ID
Field 5 = ClaimTypeE_ID
Field 6 = ClaimTypeF_ID
The six field relate to the 6 different tables ID.
If I do this how do I store the data? put 0's in each of the claim types that are not used???
Any suggestions would be appreciated.
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Jun 25, 2007
Hi,I have a question regarding best practices in database design. In arelational database, is it wise/necessary to sometimes create tablesthat are not related to other tables through a foreign Keyrelationship or does this always indicate some sort of underlyingdesign flaw. Something that requires a re evaluation of the problemdomain?The reason I ask is because in our application, the user can perform xnumber of high level operations (creating/updating projects, creating/answering surveys etc. etc.). Different users can perform differentoperations and each operation can manipulate one or more table. Thispart of the system is done and working. Now there is a requirement tohave some sort of audit logging inside the database (separate from thetext based log file that the application generates anyway). This"audit logging" table will contain high level events that occur insidethe application (which may or may not relate to a particularoperation). This table is in some sense related to every other tablein the database, as well as data that is not in the database itself(exceptions, external events etc.). For example : it might haveentries that specify that at time x user created project y, at time Auser filled out survey B, at time C LDAP server was down, At time D anunauthorized login attempt occurred etc.As I said, these seems to suggest a stand alone, floating table with afew fields that store entries regarding whats going on the systemwithout any direct relationship to other tables in the database. But Ijust feel uneasy about creating such an isolated table. Another optionis to store the "logging" information in another schema/database, butthat doubles the maintainance work load. Not really looking forward tomaintaining/designing two different schemas.I had a look at the microsoft adventureworks database schema diagramand they seem to have 3 standalong tables - AWBuildVersion, ErrorLogand DatabaseLog (unless i am reading it wrong!)Any advice, Information or resources are much appreciated.
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May 28, 2015
I have below DB structure in MSSQL for a small application which follow relational approach. Data retrieval (for Hostels) will need several Join, may be Key-Value approach where data retrieval will be fast.
Hostels
------------
HostelId,
Name,
Address,
CategotyId,
SubCategoryId,
FoodCategoryId,
LandLordId
Data:
1 H1 Address1 1 1 2 20
2 H2 Address2 1 2 2 21
3 H3 Address3 2 2 1 17
Category
----------
CategoryId,
CategoryName
[code]...
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Oct 20, 2006
Hi,
I have a problem in design the tables. My main task is to learn how to give the Match Score.
I have hundreds of dataset and one of them is like this:
Test Record Number: 19
Prospect ID = 254040088233400441105260031881009
Match Score = 95
Input Record Fielding ( eg wordnumber[Field] ) : 1[1] 2[1] 3[11] 4[11] 5[11]
Prospect Word = 1 type = 1 match level = 4 input word = 1 input type = 1
Prospect Word = 2 type = 2 match level = 0 input word = NA input type = NA
Prospect Word = 3 type = 3 match level = 4 input word = 2 input type = 1
Prospect Word = 4 type = 11 match level = 4 input word = 3 input type = 11
Prospect Word = 5 type = 13 match level = 4 input word = 4 input type = 11
Prospect Word = 6 type = 14 match level = 4 input word = 5 input type = 11
Now I have all my data stored in the DB and I seperated them into 3 tables and their structures are:
1) prospect (id, testrecordnumber, prospectID, matchscore)
2) inputfieldind (id, prspid, inputword, inputfield)
3) prospectinfo (id, prspid, prospectword, prospecttype, matchlevel, inputword, inputtype)
and the prspid in table 2 & 3 refers to the prospectID in table 1.What I did was setting:
a) prospect table as case table with id AS key, prospectID AS input & predictable;
b) and the other two as nested tables with inputword/inputfield AS key & input, prospectword/prospecttype/matchlevel/inputword/inputtype AS key & input .
But it shows error for having multiply key columns...
And also I am thinking about using the Naive bayes algorithm. Can I also have some suggestion on this?
Thanks
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Sep 9, 2015
In the Operating environment databases, may be made tables in the database on a temporary basis but they are still yet and they are not removed, how to identify tables that have been made on a temporary basis are not used (don’t have any read & write records)?
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Jul 22, 2015
How to Change Order of Column In Database Tables
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Jun 17, 2015
I am using sql server and I have a table called accnt with the fields ven1 and amnt1 and a table called acc1167 with fields ven, job#, and amnt. for this example these tables look like this
accnt acc1167
ven1 amnt1 ven job# amnt
1167 100 1167 1 200
1152 50 1167 2 300
1167 110 1167 3 100
1167 300 1167 4 200
1252 1050 1167 5 200
1167 210 1167 6 150
1167 1150
1167 130
2113 800
1167 550
1167 1200
I need to sum amnt1 for all the records in accnt with the ven1 of 1167, we will call this sumA. Then sum amnt in acc1167 for all records, we will call this sumB. next I need to divide sumB by sumA to get a ratio. finally I need to multiply each amnt value from acc1167 by the ratio and get a number that will then replace the acc1167 amnt value.
for example, sumA = 3750, sumB = 1150. taking these values, sumB/sumA = 0.307. I then replace every value in acc1167 amnt with 0.307*itself, so the final table should look like this:
acc1167
ven job# amnt
1167 1 61.4
1167 2 92.1
1167 3 30.7
1167 4 61.4
1167 5 61.4
1167 6 46.05
i have tried to use the sum function and and some insert, but i am very new to SQL and have never used sum before and don't know how to call from multiple tables, or how to store a ratio. Ive tried this:
UPDATE acc1167
sum1 = sum amnt1 where ven1 = '1167'
from accnt
sum2 = sum amnt
from accnt
SET amnt = sum2/sum1*amnt
FROM acc1167
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May 20, 2015
I normalized the below tables but I am finding it difficult to copy data to the new tables. How do I copy data from existing table to the normalized tables? see the table structure below and other supporting information:
SKU_DATA(SKU,SKU_Description,Department,Buyer) Note: this table already has data in it.
CREATE TABLE SKU_DATA (
SKU
Integer NOT
NULL,
[code].....
The table structure above have two three determinants( SKU,SKU_Description and Buyer). SKU and SKU_Description are candidate keys. Primary key is SKU.
Normalization : SKU_DATA(SKU,SKU_Description, Buyer)
BUYER(Buyer,Department)
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Apr 17, 2007
I don't know if this is the right forum but...
In a parent/child table structure (order/orderdetail) I have used identity columns for the orderdetail or compund primary keys. I find a single identity column on the detail table easier to manage (with a fk to the parent) but what ends up bieng easiest for the user is to have an order (say #3456) and detail items listed sequentially from 1 to n. This reflects a compound key structure but generating the 2nd field is a pain. Is there any way to tie an identity field to the parent key so that it will generate this number for me automatically?
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Jun 15, 2015
But it doesn't explicitly tell wherther Interpreted (disk-based) tables can be accessed by Natively compiled stored procedures.And SQL Server Express edition doesn't allow creating Memory-optimized objects to very this.
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Dec 13, 2007
I need to copy all the data from all the tables in a database to a copy of this database on another server.
What feature of SSIS should I take advantage of to accomplish this?
We have an SLA for 8am, most times the data warehousing jobs complete at 8:05am. Adding an additional process/set of tasks to this package would obviously make matters so I'm trying to update/copy/replicate the data in the fastest manner. Typically we're talking 2 marts (10-20GB) with 2 large tables (5-10 mill records) and 20 marts (0.5 - 5 GB) with many more smaller tables (~40 tables with record count ranging from 1 to a million)
Additionally please indicate if the design/feature you suggest can handle (pushing schema changes and additions to the target server) schema changes or new tablesviews added to the source database.
My only idea so far...is using the import wizard (in Management Studio) to create an SSIS package (top copy all the tables from one server to another) and saving it to the server, Then executing this package after the job is complete. However this would not work if the schema of a table changed, or if a a table is added. Moreover I don't think I can edit this package in visual studio.
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Aug 5, 2015
I am trying a create views that would join 2 tables:
Table 1: Has all the columns need by a view (
Name: Product
Structure: ID, Attribute 1, Attribute 2, Attribute 3, Attribute 4, Attribute 5 etc
Table 2: Is a lookup table that provides the names of columns
Name: lookupTable
Structure: tableName, ColumnName, columnValue
Values: Product, Attribute1, Color
Product, Attribute2, Size
Product, Attribute3, Flavor
Product, Attribute4, Shape
I want to create a view that looks like
ID, Color, Size, Flavor, Shape
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May 13, 2015
I have a scenario like below
Product1
Product2 Product3
Product4 Product5
Product1 1
1 0 0
1
Product2 1
1 0 0
1
Product3 0
0 1 1
0
Product4 0
0 1 1
0
Product5 1
1 0 0
1
How to design tables in SQL Server for the above.
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Feb 13, 2002
Ok, I'm doing a football database for fixtures and stuff. The problem I am having is that in a fixture, there is both a home, and an away team. The tables as a result are something like this:
-------
Fixture
-------
fix_id
fix_date
fix_played
----
Team
----
tem_id
tem_name
-----------
TeamFixture
-----------
fix_id
tem_id
homeorawayteam
goals
It's not exactly like that, but you get the point. The question is, can I do a fixture query which results in one record per fixture, showing both teams details. The first in a hometeam field and the second in an away team field.
Fixture contains the details about the fixture like date and fixture id and has it been played
Team contains team info like team id, name, associated graphic
TeamFixture is the table which links the fixture to it's home and away team.
TeamFixture exists to prevent a many to many type relationship.
Make sense? Sorry if this turns out to be really easy, just can't get my head around it at the mo!
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Aug 18, 2015
I would like to create a table called product. My objective is to get list of packages available for each product in data grid view column while selecting each product. Each product may have different packages type (eg:- Nos, CTN, OTR etc). Some product may have two packages and some for 3 packages etc. Quantity in each packages also may be differ ( for eg:- for some CTN may contain 12 nos or in other case 8 nos etc). Prices for each packages also will be different that also need to show. How to design the table..
Product name :
Nestle milk |
Rainbow milk
packages :
CTN,OTR, NOs |
CTN, NOs
Price:
50,20,5 |
40,6
(Remarks for your reference):CTN=10nos, OTR=4 nos
| CTN=8 Nos
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Jan 24, 2008
I'm new to my company, although not new to SQL 2005 and I found something interesting. I don't have an ERD yet, and so I was asking a co-worker what table some data was in, they told me a table that is NOT in SQL Server 2005's list of tables, views or synonyms.
I thought that was strange, and so I searched over and over again and still I couldn't find it. Then I did a select statement the table that Access thinks exists and SQL Server does not show and to my shock, the select statement pulled in data!
So how did this happen? How can I find the object in SSMS folder listing of tables/views or whatever and what am I overlooking?
Thanks,
Keith
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Dec 7, 2006
We have 20 -30 normalized tables in our dartabase . Also we have 4tables where we store the calculated data fron those normalised tables.The Reason we have these 4 denormalised tables is when we try to dothe calcultion on the fly, our site becomes very slow. So We haveprecalculated and stored it in 4 tables.The Process we use to do the precalcultion, will get do thecalculation and and store it in a temp table. It will compare the thetemp with denormalised tables and insert new rows , delte the old oneans update if any changes.This process take about 20 mins - 60mins. Ittakes long time because in this process we first do the calculationregardless of changes and then do a compare to see what are changed andremove if any rows are deleted, and insert new rowsand update thechanges.Now we like to capture the rows/columns changed in the normalisedtables and do only those chages to the denormalised table , which weare hoping will reduce the processing time by atleast 50%WE have upgraded to SQL SERVER 2005.So We like to use the newtechnology for this process.I have to design the a model to capture the changes and updated onlythose changes.I have the list of normalised tables and te columns which will affectthe end results.I thought of using Triggers or OUTPUT clause to capture the changes.Please help me with the any ideas how to design the new process
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Oct 7, 2015
I am using the following select statement to get the row count from SQL linked server table.
SELECT Count(*) FROM OPENQUERY (CMSPROD, 'Select * From MHDLIB.MHSERV0P')
MHDLIB is the library name in IBM DB2 database. The above query gives me only the row count of table MHSERV0P. However, I need to get the names, rowcounts, and sizes of all tables that exist in MHDLIB librray. Is it possible at all?
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Feb 5, 2007
From Newbie to Newbie,
Add reference to:
'Microsoft ActiveX Data Objects 2.8 Library
'Microsoft ADO Ext.2.8 for DDL and Security
'Microsoft Jet and Replication Objects 2.6 Library
--------------------------------------------------------
Imports System.IO
Imports System.IO.File
Code Snippet
'BACKUP DATABASE
Public Shared Sub Restart()
End Sub
'You have to have a BackUps folder included into your release!
Private Sub BackUpDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BackUpDB.Click
Dim addtimestamp As String
Dim f As String
Dim z As String
Dim g As String
Dim Dialogbox1 As New Backupinfo
addtimestamp = Format(Now(), "_MMddyy_HHmm")
z = "C:Program FilesVSoftAppMissNewAppDB.mdb"
g = addtimestamp + ".mdb"
'Add timestamp and .mdb endging to NewAppDB
f = "C:Program FilesVSoftAppMissBackUpsNewAppDB" & g & ""
Try
File.Copy(z, f)
Catch ex As System.Exception
System.Windows.Forms.MessageBox.Show(ex.Message)
End Try
MsgBox("Backup completed succesfully.")
If Dialogbox1.ShowDialog = Windows.Forms.DialogResult.OK Then
End If
End Sub
Code Snippet
'RESTORE DATABASE
Private Sub RestoreDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
RestoreDB.Click
Dim Filename As String
Dim Restart1 As New RestoreRestart
Dim overwrite As Boolean
overwrite = True
Dim xi As String
With OpenFileDialog1
.Filter = "Database files (*.mdb)|*.mdb|" & "All files|*.*"
If .ShowDialog() = Windows.Forms.DialogResult.OK Then
Filename = .FileName
'Strips restored database from the timestamp
xi = "C:Program FilesVSoftAppMissNewAppDB.mdb"
File.Copy(Filename, xi, overwrite)
End If
End With
'Notify user
MsgBox("Data restored successfully")
Restart()
If Restart1.ShowDialog = Windows.Forms.DialogResult.OK Then
Application.Restart()
End If
End Sub
Code Snippet
'CREATE NEW DATABASE
Private Sub CreateNewDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
CreateNewDB.Click
Dim L As New DatabaseEraseWarning
Dim Cat As ADOX.Catalog
Cat = New ADOX.Catalog
Dim Restart2 As New NewDBRestart
If File.Exists("C:Program FilesVSoftAppMissNewAppDB.mdb") Then
If L.ShowDialog() = Windows.Forms.DialogResult.Cancel Then
Exit Sub
Else
File.Delete("C:Program FilesVSoftAppMissNewAppDB.mdb")
End If
End If
Cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Program FilesVSoftAppMissNewAppDB.mdb;
Jet OLEDB:Engine Type=5")
Dim Cn As ADODB.Connection
'Dim Cat As ADOX.Catalog
Dim Tablename As ADOX.Table
'Taylor these according to your need - add so many column as you need.
Dim col As ADOX.Column = New ADOX.Column
Dim col1 As ADOX.Column = New ADOX.Column
Dim col2 As ADOX.Column = New ADOX.Column
Dim col3 As ADOX.Column = New ADOX.Column
Dim col4 As ADOX.Column = New ADOX.Column
Dim col5 As ADOX.Column = New ADOX.Column
Dim col6 As ADOX.Column = New ADOX.Column
Dim col7 As ADOX.Column = New ADOX.Column
Dim col8 As ADOX.Column = New ADOX.Column
Cn = New ADODB.Connection
Cat = New ADOX.Catalog
Tablename = New ADOX.Table
'Open the connection
Cn.Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Program FilesVSoftAppMissNewAppDB.mdb;Jet
OLEDB:Engine Type=5")
'Open the Catalog
Cat.ActiveConnection = Cn
'Create the table (you can name it anyway you want)
Tablename.Name = "Table1"
'Taylor according to your need - add so many column as you need. Watch for the DataType!
col.Name = "ID"
col.Type = ADOX.DataTypeEnum.adInteger
col1.Name = "MA"
col1.Type = ADOX.DataTypeEnum.adInteger
col1.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col2.Name = "FName"
col2.Type = ADOX.DataTypeEnum.adVarWChar
col2.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col3.Name = "LName"
col3.Type = ADOX.DataTypeEnum.adVarWChar
col3.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col4.Name = "DOB"
col4.Type = ADOX.DataTypeEnum.adDate
col4.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col5.Name = "Gender"
col5.Type = ADOX.DataTypeEnum.adVarWChar
col5.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col6.Name = "Phone1"
col6.Type = ADOX.DataTypeEnum.adVarWChar
col6.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col7.Name = "Phone2"
col7.Type = ADOX.DataTypeEnum.adVarWChar
col7.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col8.Name = "Notes"
col8.Type = ADOX.DataTypeEnum.adVarWChar
col8.Attributes = ADOX.ColumnAttributesEnum.adColNullable
Tablename.Keys.Append("PrimaryKey", ADOX.KeyTypeEnum.adKeyPrimary, "ID")
'You have to append all your columns you have created above
Tablename.Columns.Append(col)
Tablename.Columns.Append(col1)
Tablename.Columns.Append(col2)
Tablename.Columns.Append(col3)
Tablename.Columns.Append(col4)
Tablename.Columns.Append(col5)
Tablename.Columns.Append(col6)
Tablename.Columns.Append(col7)
Tablename.Columns.Append(col8)
'Append the newly created table to the Tables Collection
Cat.Tables.Append(Tablename)
'User notification )
MsgBox("A new empty database was created successfully")
'clean up objects
Tablename = Nothing
Cat = Nothing
Cn.Close()
Cn = Nothing
'Restart application
If Restart2.ShowDialog() = Windows.Forms.DialogResult.OK Then
Application.Restart()
End If
End Sub
Code Snippet
'COMPACT DATABASE
Private Sub CompactDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
CompactDB.Click
Dim JRO As JRO.JetEngine
JRO = New JRO.JetEngine
'The first source is the original, the second is the compacted database under an other name.
JRO.CompactDatabase("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Program
FilesVSoftAppMissNewAppDB.mdb; Jet OLEDB:Engine Type=5", "Provider=Microsoft.Jet.OLEDB.4.0;
Data Source=C:Program FilesVSoftAppMissNewAppDBComp.mdb; JetOLEDB:Engine Type=5")
'Original (not compacted database is deleted)
File.Delete("C:Program FilesVSoftAppMissNewAppDB.mdb")
'Compacted database is renamed to the original databas's neme.
Rename("C:Program FilesVSoftAppMissNewAppDBComp.mdb", "C:Program FilesVSoftAppMissNewAppDB.mdb")
'User notification
MsgBox("The database was compacted successfully")
End Sub
End Class
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Jul 20, 2005
I'm working on an ASP.Net project where I want to test code on a localmachine using a local database as a back-end, and then export it tothe production machine where it uses the hosting provider's SQL Serverdatabase on the back-end. Is there a way to export tables from oneSQL Server database to another in such a way that if a table alreadyexists in the destination database, it will be updated to reflect thechanges to the local table, without existing data in the destinationtable being lost? e.g. suppose I change some tables in my localdatabase by adding new fields. Can I "export" these changes to thedestination database so that the new fields will be added to thedestination tables (and filled in with default values), without losingdata in the destination tables?If I run the DTS Import/Export Wizard that comes with SQL Server andchoose "Copy table(s) and view(s) from the source database" and choosethe tables I want to copy, there is apparently no option *not* to copythe data, and since I don't want to copy the data, that choice doesn'twork. If instead of "Copy table(s) and view(s) from the sourcedatabase", I choose "Copy objects and data between SQL Serverdatabases", then on the following options I can uncheck the "CopyData" box to prevent data being copied. But for the "CreateDestination Objects" choices, I have to uncheck "Drop destinationobjects first" since I don't want to lose the existing data. But whenI uncheck that and try to do the copy, I get collisions between theproperties of the local table and the existing destination table,e.g.:"Table 'wbuser' already has a primary key defined on it."Is there no way to do what I want using the DTS Import/Export Wizard?Can it be done some other way?-Bennett
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Oct 17, 2006
I have a trade data tables (about 10) and I need to retrieve information based on input parameters. Each table has about 3-4 million rows.
The table has columns like Commodity, Unit, Quantity, Value, Month, Country
A typical query I use to select data is "Select top 10 commodity , sum(value), sum(quantity) , column4, column5, column6 from table where month=xx and country=xxxx"
The column4 = (column2)/(total sum of value) and column 5=(column3)/(total sum of quantity). Column6=column5/column4.
It takes about 3-4 minutes for the query to complete and its a lot of time specially since I need to pull this information from a webpage.
I wanted to know if there is an alternate way to pull the data from server ?
I mean can I write a script that creates tables for all the input combinations i.e month x country (12x228) and save them in table (subtable-table) with a naming convention so from the web I can just pull the table with input parameters mapped to name convention and not running any runtime queries on database ??
OR
Can I write a script that creates a html files for each table for all input combinations save them ?
OR
Is there exists any other solution ?
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Dec 9, 2007
Hi all,
I have a large Excel file with one large table which contains data, i've built a SQL Server DataBase and i want to fill it with the data from the excel file.
How can it be done?
Thanks, Michael.
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Apr 22, 2004
Hi,
Currently, I'm using the following steps to migrate millions of records from Foxpro tables to SQL Server tables:
1. Transfer Foxpro records to .dat files and then bcp to SQL Server tables in a dummy database. All the SQL tables have the same columns as the Foxpro tables.
2. Manipulate the data in the SQL tables of the dummy database and save the manipulated data into the SQL tables of the real database where the tables may have different structure from the corresponding Foxpro tables.
I only know the following ways to import Foxpro data into SQL Server:
#1. Transfer Foxpro records to .dat files and then bcp to SQL Server tables
#2. Transfer Foxpro records to .dat files and then Bulk Insert to SQL Server tables
#3. DTS Foxpro records directly to SQL Server tables
I'm thinking whether the following choices will be better than the current way:
1st choice: Change step 1 to use #2 instead of #1
2nd choice: Change step 1 to use #3 instead of #1
3rd choice: Use #3 plus manipulating in DTS to replace step 1 and step 2
Thank you for any suggestion.
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