Discover Relationships Between Existing Tables Of A Database
Mar 23, 2007
Hello Friends,
I am right now working on a project that has a database with over 100 tables in a database. Because of extreme time constraints the developers didn't build in any relationships or constraints between or in the tables. Now I need to remodel the database such that the database is more structured and normalized. I don't have much knowledge about the database design since it is a 2 year old application and the person who developed the database is now gone. I know remodelling the database would require knowledge of the existing database and business rules.
I was wondering if there are any tools that could suggest or discover relationships between tables. For eg. Lets say there are two tables named 'Customer' and 'Order'. I notice that there is a column named 'id' in Customer and a column named 'customer_id' in Order. So I ask the tool to discover a relationship between id and customer_id and it tells me that there is a one-one or one-many or no relationship by comparing values. I heard ERWin would be able to do that but thats expensive. Please do let me know asap.
View 2 Replies
ADVERTISEMENT
Aug 24, 2006
Hi, I'm working on Sql Server 2005 Express and I'm trying to transfer over some of my tables with the primary and foreign keys relations as well as the data in them from one asp.net 2.0 website to another.But I can't seem to find the Import/Export option in Sql Server 2005 Express Edition, does anyone know how I can do this?Thanks in advanced.
View 1 Replies
View Related
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
View 3 Replies
View Related
Jun 29, 2015
trying to get a new database created then running a script to created the tables, relationships, indexes and insert default data. All this I'm making happen during the installation of my Windows application. I'm installing SQL 2012 Express as a prerequisite of my application and then opening a connection to that installed SQL Server using Windows Authentication.
E.g.: Data Source=ComputerNameSQLEXPRESS;Initial Catalog=master;Integrated Security=SSPI; Then I run a query from my code to create the database eg: "CREATE DATABASE [MyDatabaseName]".
From this point I run a script using a Batch file containing "SQLCMD....... Myscriptname.sql". In my script I have my tables being created using "Use [MyDatabaseName] Go CREATE TABLE [dbo].[MyTableName] .....". So question is, should I have [dbo]. as part of my Create Table T-SQL commands? Can I remove "[dbo]."? Who would be the owner of the database? If I can remove the [dbo]., should I also remove dbo. from any query string from within my code?
View 3 Replies
View Related
Aug 21, 2006
Hi,
I'm trying to find the most efficient method of importing XML files into SQL Server using SSIS. The objective is to read these files created in a source directory and potentially there will be a large number of these created every second.
I've experimented with the XML Source data flow task and been able to import using either the OLEDB Destination or SQL Server Destination.Using the associated XSD file
These methods work well when there are no PK or FK relationships, i.e. the target tables are stand alone.
However when I use a schema that has relationships I need to be able to import and be able to return the key then use this key to import into another table to ensure the FK relationship and so on.....
From what I know I will need to create multple Data Flow tasks when reading a single xml file then in turn create a 'look up' on a table to see if this entity exists and on error insert using the OLEDB command and then somehow return the PK generated???
Has anyone tried this? And would be happy to share there experiences?
It seems a lot easier to use an SP and then use an execute SQL task method
Your thoughts would be greatly appreciated
Thanks
John
View 13 Replies
View Related
Aug 13, 2007
Hi All,
I would like to restore database using RESTORE DATABASE ... REPLACE command.
If database exists already and has any open connections this command will fail.
I would like to close all existing connections to specific database before running RESTORE DATABASE ... REPLACE command.
I can do closing from Management Studio using checkbox "Close Existing Connection" when deleting database. Actually I need to do the same but from script.
Please advice me how to do it.
Thanks in advance,
Roman
View 3 Replies
View Related
Jan 25, 2008
hello,
i am wondering, for what i use relations between tables? if i make sure that the data inserted into the table matches, for what i need table relationships?
i have a table named Pictures with: PictureID, UserID, UserName, PictureName, Description...
do i have to make relationships between UserID from Pictures and UserId from aspnet_Users?
and the second table PicturesComments witch has: CommentID, PictureID, UserID, UserName...
do i have to makre relationship between PictureID from PictureComments and PictureID from Pictures AND between UserID from Pictures and UserId from aspnet_Users?
sorry for this stupid questions...
thanks
View 5 Replies
View Related
Mar 12, 2014
I am creating a small piece of software which handles a pre-advice data file, several scanner inputting weights and a supplier weight report.
The pre-advice contains a list of barcodes and details revolving around that barcode, each barcode will be scanned and a weight will be obtained, this will be place in the DB.
Currently my tables can be summarized like this.
Pre-Advice Table
Barcode
Lots of other info…
Scanners Table
Barcode
Date
Time
Weight
Which device input this information
Suppliers Weight Table
Barcode
Date
Time
Weight
Here is the process(es):
1.Pre-advice table populated.
2.When the barcode is scanned and a weight is obtained, a record will be added to the scanners table and this becomes the ‘active’ weight.If there is already an ‘active’ weight against this barcode the user will be asked if they wish to use the ‘active’ weight already in the system or update the ‘active’ weight to the weight they have entered.
3.Then when the supplier weight report is inputted into its table, should the ‘active’ weight be less than the supplier weight, the supplier weight becomes the ‘active’ weight.
At any given time a user can pull a report based on information in the Pre-Advice table, which will need to include the ‘active’ weight for that barcode’s record.
Additionally, no weights should be deleted, I need a fully traceable log of who, what, where & when. I will need to pull reports on the trials of scans so it really is a must to keep these.
Furthermore, if a scanner was to scan the same barcode after the Suppliers weight had been input and the user chooses to replace the weight then, the scanners weight should become the new ‘active’ weight.
I believe I will need to modify my tables to accommodate my needs, however I am not sure exactly what or how to set up what I need.I understand I will need some type of relationship between all of the tables to be able to pull the report on the Pre-Advice table, but I am lost.
how I will need to set up my tables/relationships in order to achieve my requirements?
View 3 Replies
View Related
Jul 27, 2007
There are several databases (currently in Access) that are being moved to SQL Server. Would prefer keeping those databases separate in SQL Server. How do you do something similar to Access's "link" capabilities and relate tables in different physical databases? For example, relate the authors of a document in a document database to persons in a people database where AuthorID in Docs.DocAuthors.AuthorID is related to People.Persons.PersonID
View 4 Replies
View Related
May 15, 2008
Hi, I have two tables. One is called ContentRecord and it is one field, an identity field that is a primary key. I have another table that is has several fields including a field that is a foreign key called contentFK. I have set up a foreign key relationship between the tables. There is a one to many relationship. I would like to know the best way to add a record to both tables. The way I am thinking to do it is to do the insert statement to add the record to the ContentRecord which will return the value of the primary key field. Then do a seperate insert statement to insert the record into the second table where I set the contentFK equal to the returned value from the first statement. Does that make sense? Is there a better way to do this?
Thanks,
Laura
View 4 Replies
View Related
May 17, 2002
Can anyone give me an idea like, what percentage of organizations use 'code' to maintain the parent-child relations on their tables than
having FK constraints thru the db model? Because,all the companies that I worked with used 'code' to control the relationships across the tables(not the PK/FKs.!!)
Thanks.
Neil.
View 2 Replies
View Related
May 29, 2003
I export all tables from serverA databaseAA to serverB (both SQL2k sp3)databaseAA with 'Success', but without any relationships. In SQL6.5 Tools of Transfer will bring all objects include relationship.
I also tried export "All Objects" which fails with unclear message. I just don't want to do a backup and restore....
thanks
David
View 9 Replies
View Related
Mar 20, 2008
Can Anybody explain me this how to Do this ?
Is this done by definning the Primary key and foreign key constraints ?
View 1 Replies
View Related
Nov 5, 2007
Guys,
I have 600 tables in my database, out of which 40 tables are look up value tables. I want generate truncate scripts which truncates all the tables in order of Parent child relationship excluding lookup tables. Is there any way to do this apart from figuring out Parent Child relationship and then writing the truncate statements for each of the table.
For example
EmployeeDetail table references Employee table
DepartmentDetail table references Department table
Department table references Employee table
My truncate script should be
TRUNCATE TABLE DEPARTMENTDETAIL
TRUNCATE TABLE EMPLOYEEDETAIL
TRUNCATE TABLE DEPARTMENT
TRUNCATE TABLE EMPLOYEE
IS there any automated way to figure out parent and child tables and generate truncate script for the same.
Thanks
View 3 Replies
View Related
Jul 20, 2005
Hello,I am putting together a row level security plan for our salesdatabase. I will give a brief description of the method I am thinkingof using to give you an idea of how I will need to be able to discoverthe group or login the user is using to access the data.I have a table called salesfact, it has all the sales info for all thebranches of our company. Each order(row) that is inserted has an entryin the division_number column to describe which branch the orderbelongs to. I have created another table(Branch_Folks) that has fourcolumns; username, windows_group, SQL_Login and division_number.I am using a view and SQL logins to control access to the data basedon the user, the SQL logins give windows groups access to the view.Only users that are added to the specific branch groups will haveaccess to the logins, but if a user is added to the group without mebeing notified, then he will not have a corresponding entry in theBranch_Folks table. Currently I am using the SUSER_SNAME() function todetermine which user is accessing the data from the view that I havecreated. The view uses this select statement to filter the data basedon the user & division.Select * from tsalesfact A, Branch_Folks B where SUSER_SNAME() =B.username and A.division_number = b.division_numberThis method works fine, but I will have to manually maintain the userlist in the Branch_Folks table in case a new user joins the windowsbranch group. I would like to use a function similar to SUSER_SNAME()that can determine the windows group or SQL Login a user is using.Does anyone know of a way to do this??Thanks a ton,Tim
View 1 Replies
View Related
Jun 7, 2005
I've been searching around for some info on how to set this up, but with no luck.I need to have a .sql file that will set up a few tables and these tables will have relationships and contraints.I can do this by hand in enterprise manager, but need to set up some procedures that will do the same thing.For instance, I can create the tables just fine.....CREATE TABLE students ( sId int NOT NULL PRIMARY KEY, studentId varchar(50) NOT NULL, course varchar(50) )
CREATE TABLE courses ( cId int NOT NULL PRIMARY KEY, course varchar(50) NOT NULL, sco varchar(50) )But, I need to set up relationships in there somehow.Once student may have many courses (one to many) and one course may have many sco's (one to many) SCO would be another table.Can someone point me to a good link that would show how to complete these procedures?Thanks all,Zath
View 4 Replies
View Related
Mar 1, 2006
I'm converting an existing production replication process to SQL 2005 for testing. My snapshot for a merge replication is failing.
Environment: Single XP server, no filters, @schema_option = 0x000000000C034DD1
I have several snapshot jobs in my process, 2 for transactional replication and 2 for merge replications. In both types, I'm replicating from A to B and then from B to C. In the failing job, I'm merge replicating from B to C. In this failing snapshot job, the error messages are:
2006-03-01 18:42:17.22 [58%] Bulk copying snapshot data for article 'MyName1'
2006-03-01 18:42:17.34 [58%] Bulk copied snapshot data for article 'MyName2' (0 rows).
2006-03-01 18:42:17.41 [58%] Bulk copied snapshot data for article 'MyName1'(195 rows).
2006-03-01 18:42:29.84 [61%] Discovering dependencies among article objects in the specified publication
2006-03-01 18:42:33.66 [61%] The replication agent had encountered an exception.
2006-03-01 18:42:33.66 Source: Unknown
2006-03-01 18:42:33.66 Exception Type: Microsoft.SqlServer.Management.Smo.FailedOperationException
2006-03-01 18:42:33.66 Exception Message: Discover dependencies failed.
2006-03-01 18:42:33.66 Message Code: Not Applicable
2006-03-01 18:42:33.66
Does anyone have an idea what I could look for to try and fix this?
The A to B snapshot obviously uses the same tables. My snapshot for merge job (which worked) messages for the A to B snapshot are:
Message
2006-03-01 18:40:24.98 Time spent analyzing foreign key references (seconds): 0.00
2006-03-01 18:40:24.98 Time spent analyzing check and default constraint references (seconds): 0.19
2006-03-01 18:40:24.98 Time spent analyzing non-article object dependencies (seconds): 0.42
2006-03-01 18:40:24.98 Time spent preparing snapshot generation (seconds): 35.49
2006-03-01 18:40:24.98 Time spent generating merge replication procedures (seconds): 41.39
2006-03-01 18:40:24.98 Time spent generating merge replication stored procedure scripts for subscribers (seconds): 20.66
2006-03-01 18:40:24.98 Time spent bulk copying data (seconds): 1.25
2006-03-01 18:40:24.98 Time spent copying/compressing generated file (seconds): 0.00
2006-03-01 18:40:25.00 Time spent adding rowguid columns/creating merge triggers (seconds): 1.38
2006-03-01 18:40:25.00 Time spent posting snapshot commands (seconds): 25.97
2006-03-01 18:40:25.00 *******************************************************************************
I kicked off the job again and got a different error message:
Message
2006-03-01 19:17:30.32 ---------------------------------------------
2006-03-01 19:17:30.32 -BcpBatchSize 100000
2006-03-01 19:17:30.32 -HistoryVerboseLevel 2
2006-03-01 19:17:30.32 -LoginTimeout 15
2006-03-01 19:17:30.32 -QueryTimeout 1800
2006-03-01 19:17:30.32 ---------------------------------------------
2006-03-01 19:17:30.32 Connecting to Publisher 'xxx-xxxxxxxx'
2006-03-01 19:17:30.34 Publisher database compatibility level is set to 90.
2006-03-01 19:17:30.36 Retrieving publication and article information from the publisher database 'xxx-xxxxxxxx.xxxxxxxxx'
2006-03-01 19:17:30.54 [0%] The replication agent had encountered an exception.
2006-03-01 19:17:30.54 Source: Replication
2006-03-01 19:17:30.54 Exception Type: Microsoft.SqlServer.Replication.ReplicationAgentSqlException
2006-03-01 19:17:30.54 Exception Message: Data is Null. This method or property cannot be called on Null values.
2006-03-01 19:17:30.54 Message Code: 52006
2006-03-01 19:17:30.54
Does that help provide a clue?
View 7 Replies
View Related
Aug 22, 2006
While playing about with SQL Server 2005 I am sure that I saw a tool to do relationships the same was as in access - however now I can't find it.
Am I seeeing things or does this really exist?
View 2 Replies
View Related
Aug 2, 2004
When you make a join, it may look something like this:
SELECT Products.ProductName from Products, Categories
WHERE Categories.CategoryName = 'Seafood' AND
Products.CategoryID = Categories.CategoryID
In this query you use 'Products.CategoryID = Categories.CategoryID' to give the relation between the two tables. But if you already added the relationships to your database, this should be known.
My question is, why is it necessary to add the relation in the query when the relationships are already in the database? Is it somehow possible to ommit the relation in the query and make use of the relationships in the database.
Kind regards,
Iwan Rotteveel
View 5 Replies
View Related
Feb 25, 2008
I've been handed a very old database to knock into shape for an ASP.NET energy monitoring website. The current tables seem to have been created as cross tabs from the meter raw data, and are in the form-
CREATE TABLE [dbo].[PW_Table] ( [Date] [int] NULL , [Meter_1] [float] NULL , [Meter_2] [float] NULL , [Meter_3] [float] NULL , [Meter_4] [float] NULL , [Meter_5] [float] NULL , [Meter_6] [float] NULL , [Meter_7] [float] NULL) ON [PRIMARY]
I'd like to rearrange them into the format-
ReadingID (Identity), ReadingDate (datetime), ReadingValue (float), MeterID (int)
I would set up a lookup table for the Meters and join on MeterID.
Converting the date value from an int into a DateTime is no problem, but I can't work out how to transpose the meter readings. Can anyone point me towards a way of doing this via SQL, or would it need to be done by hand?
Thanks in advance for any help offered.
View 4 Replies
View Related
Sep 22, 2006
hello
I am working with an existing database and there is no Foreign key between 2 tables
how can i create a FK after , when the tables are allready full ?
product :
product_id
report_id
name
report :
report_id
dateR
i want to create a FK on product.report_id, and ON DELETE CASCADE
thank you
View 2 Replies
View Related
May 5, 2015
I'm using Sql Server 2012 Enterprise and have a database with over 400 tables. I am looking at one diagram which contains about 20 (or so) tables and their relationships. When I right-click on a relationship line I only see information about which tables are connected on that line but not on which fields. Can I get that information from the Diagram or can I only get that from the sys tables?
View 2 Replies
View Related
Apr 8, 2012
I have three tables :
England_Summer_2001
England_Summer_2002
England_Summer_2003
The tables have the following columns :
Player, Position, [From], [To], Fee, Type, ID, League, Window
I want to create a new table, EnglandFinal with all the data from the three tables although I'm guessing it would not be a good idea to copy the primary keys (ID column) as they would clash.
I have played around with CREATE and INSERT into and UNION but I get various errors. I'm sure I've done this before!
This creates a table from a single table :
select * into Final
from England_Summer_2001
View 14 Replies
View Related
Jun 4, 2007
Hi guys , assuming right now I already create partition function (PF_Date) and partition scheme (PS_Date). Let say I would like to implement the partition on the existing tables ( eg: transaction table which is in PRIMARY filegroup), how am I switch it from PRIMARY to PS_Date ? Is it I have to re-create the particular table then only able to put in the partition scheme? Hope can get any assistance here. Thanks alot.
Best Regards,
Hans
View 8 Replies
View Related
Dec 18, 2006
Hello,
How to add the NOT FOR REPLICATION Option to Existing Tables( IDENTITY column,FOREIGN KEY constraints )- TSQL.
Thanks,
Kanna.
View 5 Replies
View Related
Aug 12, 2005
I need to populate tables in my MS SQL 2000 DB with content from an excel file. I am not sure how this is done or how to format the excel file. If someone could help me with this it would be much appreciated!Thanks!
View 3 Replies
View Related
May 6, 2015
I have been asked to create PK on many tables using a query on all tables where we do not have clustered indexes. Some of the tables contains PK but non-clustered. If in a table there are no PK, then how to decide on which column PK can be created? can we do it with the query without data loss and without human intervention?
View 5 Replies
View Related
Nov 8, 2006
I have a real table with an identity column and a trigger to populate this column.
I need to import / massage data for data loads from a different format, so I have a temp table defined that contains only the columns that are represented in the data file so I can bulk insert.
I then alter this table to add all the other columns so that it reflects all the columns in the real table. I then populate all the values so that this contains the data I need.
I then want to insert into the real table pushing the data from the temp table, however this gives me errors stating that the query returned multiple rows.
I specified all the columns in the insert grouping as well as on the select from the temp table.
ANY thoughts / comments are appreciated. This is beginning to drive me nuts.
Rob
View 5 Replies
View Related
Nov 11, 2014
Is there a method of forcing existing tables into the in-memory filegroup so the table data can benefit from in-memory processing.
View 7 Replies
View Related
Feb 9, 2015
We have an existing BI/DW process that adds large chunks of data daily (~10M rows) to an existing table, as well as using Deletes to remove stale data. This scenario seems to beg for partitioning to support switching in/out data.
After lots of reading on this, I have figured out the mechanics of the switching, bit I still have some unknowns about the indexes needed to support this.
The table currently has several non-clustered indexes, including one on the partitioning column - let's call that column snapshotdate. Fortunately there are no FKs involved, and no constraints.
Most of the partitioning material I see focuses on creating a clustered PK to assist with switching. Not sure if this is actually necessary, but assume I create one using an Identity column (currently missing) plus snapshotdate.
For the other non-clustered, non-unique indexes, can I just add the snapshotdate to the end of the index? i.e. will that satisfy the switching requirement?
View 1 Replies
View Related
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)
View 2 Replies
View Related
Nov 10, 2015
1. I need to make use of in memory engine for my pr-existed develop procedures ,tables ,index. do I need and code changes for application and how to store tables /indexes in OLTP memory
Assume table index may have primary key index as well.
2. If table with one primary index and 2 foreign constraints, 3 non clusters indexed. which one able o load to memory area and how t do that.
3. In memory is lock free zone. usually locks will happpen in RDMS context . how this works without locks.
View 3 Replies
View Related
Aug 6, 2015
I want to restore a database (from an encrypted .bak file) - but *not* over the live original if you take my meaning. Encryption is the standard AES-256 that comes with Sql Server 2014 btw. I don't want the original touched/altered in any way. I would like to capture a success message if possible.I can extract the physical device name of the database in question using the following code:
SELECT physical_device_name, *
FROM msdb.dbo.backupmediafamily
WHERE media_set_id =(SELECT TOP 1 media_set_id
FROM msdb.dbo.backupset
WHERE database_name='MyDatabase'
AND type='D'
ORDER BY backup_start_date DESC)
I would like if the newly restored database was rename to something different than 'MyDatabase' (as shown above) and has different logs than the original. If possible, and capture a success message when restored.
View 5 Replies
View Related
