I'm designing a database with 3 tables called Function, Test and
Scene.
A Function has multiple Tests, but a Test has only one Function. A
many to many relationship exists between Test and Scene therefore I
need a junction table between these two tables - giving 4 tables in
total. The Test table would store a foreign key, the primary key of
the Function table.
There is a problem with design though and that is that Functions and
Scenes are actually defined before the Test is defined. Therefore it
should be possible to create a Function and add to id its Scenes,
before Tests have been defined. In other words, Scenes are as much a
part of a Function as they are of Tests. Tests are in fact only of
relavence to testers. Anyway, to satisfy this scenario, a Junction box
is also needed beween Function and Scene. This creates a loop between
all tables.
Is this a good approach? Any other suggestions or advice on the
matter? Any advice regarding data integrity?
As an example, I am building an authentication mechanisim that will usedata in the 3 left tables to determine rights to objects in adestination table, diagrammed below. In this structure, multiplerecords in the left tables will point to multiple records in the righttable. Normally, I would approach this problem using junction tables(LeftID, RightID) to create many-to-many joins.However, given the structure of each table is nearly identical (as faras the linking IDs are concerned), I could also use a single junctiontable with columns for each available table ID (LeftID1, LeftID2,LeftID3, RightID). In this table, only two IDs would be utilized perrow (LeftIDx -> RightID).In both designs, the needed rights information is returned from fairlysimple views, thus the end result is equivalent. The advantage to thesecond, multi-ID junction table design, is a simpler databasestructure. However, never using this approach before, I am unsure ofthe potential future performance impacts.Any significant downsides to this second design? Examples of anabbreviated structure follow:Data Tables-----------LeftTable1LeftID1 (int)Data1LeftTable2LeftID2 (int)Data2LeftTable3LeftID3 (int)Data3DestinationTableRightID (int)DataLinking tables option 1-----------------------JunctionTable1LeftID1RightIDJunctionTable2LeftID3RightIDJunctionTable3LeftID3RightIDLinking table option 2----------------------JunctionID1 (int)ID2 (int)ID3 (int)DestinationID (int)
Looking for some help here, so thanks for any input. I'm a painfully new newbie to SQL scripting.Situation: I have a simple database to handle an organization's events. Those events are categorized and may have more than one category assigned to each event. I need a maintenance Web Form to update their events.Set Up (so far): I have a CATEGORIES table. It has an auto incrementing UID and a Category name field. This table will be updated so infrequently, I plan to update it manually (no need for a maintenance Web Form). Next is the EVENTS table. It also has an auto incrementing UID along with several fields (Title, Location, DateTime, etc.). The junction table is named jEVENTSCATEGORIES. It has its own auto incrementing UID along with 2 fields named for the primary keys (UIDs) in the other 2 tables (EventsID and CategoryID).Goal: On the Web Form, I have a CheckBoxList control that's populated by the CATEGORIES table. One or more categories can be checked for each event. I have a FormView control that allows Edits and Inserts.Need: I need to know the INSERT statement(s) required to insert a new record in the EVENTS table and then to update one or more rows in the junction table (jEVENTSCATEGORIES).My Assumptions: I know how to create SELECTs and INSERTs and whatnot, but I'm not certain how to create a second INSERT statement that is based on a variable (or output) from a previous action. So any help would be MUCH appreciated. Thanks for your time!
Maybe this is the wrong formum but I've got a question for which you probably have the answer, i hope.
Situation ------------ John is member of Group_A and Group_B Bill is member of Group_B and Group_C Allison is member of Group_A and Group_E
How can I create a query to input Allisons username into table 1 and groupmembership into table 2. Also updating the relationship within junction-table3 must be done automaticaly. I want to avoid duplicate records. The final situation I want is given in red text.
The relationships between the tables are as follows ------------------------------------------------------------- Table1 (PK)ID-Userinfo [ONE] <------------> [MANY] Table3 ID-Userinfo Table3 (PK)ID-GroupInfo [MANY] <------------> [ONE] Table2 (PK)ID-GroupInfo
Table1: UserInfo ------------------------------ (PK)ID-Userinfo UserName 1 John 2 Bill 3 Allison
I have two tables. A table called users (content speaks by it self) and a table called groups. Since i want every user to be able to be a member of several groups and, of course, a group to have several users i have made a junction table called jt. The junction table contains userId's and groupId's according to the user-group bindings. The primary key(identity) in the junction table is a int named jtId. Now i want to take out all posts from the junctiontable and the corrresponding userName (s) from the users-table and the corresponding groupName from the groups-table. Can somebody please help me to make a SQL command that will di that for me. I have tried with INNER JOIN and several SELECTS in the same command. Thanks in advance, Greetings from Esben
Hi i have a junction table(UserGroups) which is linking my users table with my groups table, however when the information is coming back in the format below, instead i want the group names to appear in only one field, instead of repeating the same data, could someone please tell me what i need to change
UserName: Edwin CarolsUserAge: 28JobTitle: ManagerGroupName: AFC Below is my SQL statement; SELECT Users.UserName,Users.UserAge, Users.JobTitle, Groups.GroupName FROM Users INNER JOIN UserGroups ON Users.UserID = UserGroups.UserID INNER JOIN Groups ON UserGroups.GroupID = Groups.GroupID WHERE (Users.UserID = '5')
Hi i have a junction table(UserGroups) which is linking my "users" table with my "groups" table, however when the information is coming back in the format below, instead i want the group names to appear in only one field, instead of repeating the same data, could someone please tell me what i need to change.
UserName: Edwin CarolsUserAge: 28JobTitle: ManagerGroupName: AFC Below is my SQL statement; SELECT Users.UserName,Users.UserAge, Users.JobTitle, Groups.GroupName FROM Users INNER JOIN UserGroups ON Users.UserID = UserGroups.UserID INNER JOIN Groups ON UserGroups.GroupID = Groups.GroupID WHERE (Users.UserID = '5')
Hi i have a junction table(UserGroups) which is linking my "users" table with my "groups" table, however when the information is coming back in the format below, instead i want the group names to appear in only one field, instead of repeating the same data, could someone please tell me what i need to change.
UserName: Edwin Carols UserAge: 28 JobTitle: Manager GroupName: AFC
Below is my SQL statement;
Code:
SELECT Users.UserName,Users.UserAge, Users.JobTitle, Groups.GroupName FROM Users INNER JOIN UserGroups ON Users.UserID = UserGroups.UserID INNER JOIN Groups ON UserGroups.GroupID = Groups.GroupID WHERE (Users.UserID = '5')
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?
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)
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!
Hi all, This is a bit of a general question regarding SQL Server link tables that i hope someone can find the time to answer.
I am looking for the best practice. If I have 3 tables
1) tblCompetition 2) tblTeams 3) tblTeamsInCompetition (this is the link table)
I know the link table should have a related CompetitionID and TeamID, but should the link table also have a primary key that is an identity autoincrement by 1 just as you would with the other two tables. In Access I have never done this, however in SQL Server I have read that you should do this (but now I can't find the documentation again which prompts me to ask the question here).
Thanks for taking the time to answer this question.
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/
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>
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) .....
(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) .....
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.
This seems like such a simple problem but I am new developer even through I have been on the administration end of things for some time. I will go into more detail about my tables and there relationships below. Anyway, I am trying to create a many-to-many relationship within ms sql server 2005. I have created both of my primary tables and also a junction table per the directions on microsoft's website all per ms's instructions as stated here...
At then end of these instruction it states as a NOTE: The creation of a junction table in a database diagram does not insert data from the related tables into the junction table. For information about inserting data into a table, see How to: Create Insert Results Queries (Visual Database Tools).
and these directions do not go into detail on how to do an insert on a junction table. And I cant find out how to do this anywhere on the internet... I did create a T-SQL INSERT statement in a trigger as listed below but I end up getting an error AS LISTED BELOW....
Here is how I set everything up...
PetitionSet table consists of:
PetitionSetID int auto-increment primary key PetitionSetName varchar(50) no nulls PetitionSetScope varchar(50) no nulls
the Petition table consists of:
PetitionID int auto-increment primary key PetitionSetID int no nulls PetitionName varchar(50) no nulls
the SetToPetitionJunction table consists of: PetitionSetID int PetitionID int
And, there is a composite key made up of both the PetitionSetID and PetitionID fields.
I have created the foreign key relationships with DEFAULT VALUES from the SetToPetitionJunction table to each column's respective corresponding column in each of the tables: PetitionSet and Petition.
The trigger is on the Petition table and it has the following code:
set ANSI_NULLS ON set QUOTED_IDENTIFIER ON go -- ============================================= -- Author: Name -- Create date: -- Description: -- ============================================= ALTER TRIGGER .[SetToPetitionJunctionTrigger] ON .[dbo].[Petition] AFTER INSERT AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON;
INSERT INTO SetToPetitionJunction (PetitionID, PetitionSetID) SELECT Petition.PetitionID, PetitionSet.PetitionSetID FROM Petition INNER JOIN PetitionSet ON Petition.PetitionSetID = PetitionSet.PetitionSetID
END
I have created an asp.net 2.0 front end to insert values into the PetitionSet table and the Petition Table. And in the detailsview for the Petition table I manually insert the PetitionSetID field to the number that corresponds to an auto-generated number on the primary key of the PetitionSet table. So I am maintaining referential integrity...
The first time it works and inserts one record in the Junction table containing the PetitionSetID from the PetitionSet table and the PetitionID from the petition table.
Then when I try to add in another petition for the same petition set number just like I did the first time and then I get this error...
Violation of PRIMARY KEY constraint 'PK_SetToPetitionJunction'. Cannot insert duplicate key in object 'dbo.SetToPetitionJunction'. The statement has been terminated.
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.
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?
Can Somebody please show me how to acheive this, using the order details in Northwinddatabase or any other good example. as much details as possible. Many Thanks!
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???
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.
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.
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:
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?
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)?
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
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:
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
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.
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?
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.
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.
