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VB.net - Find SQL Table relationships

Posted on 2013-12-09
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Last Modified: 2013-12-11
Hi

What VB.net code would I use to find the table relationships in a SQL database?
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Question by:Murray Brown
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3 Comments
 
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Expert Comment

by:Carl Tawn
ID: 39706227
Are you planning on doing this with SQLDMO, or via a straight-forward query?
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unknown_routine earned 2000 total points
ID: 39706242
You need to run the following query:

Select
	object_name(rkeyid) Parent_Table,
	object_name(fkeyid) Child_Table,
	object_name(constid) FKey_Name,
	a1.name FKey_Col,
	a2.name Ref_KeyCol
From
	sys.sysforeignkeys s
	Inner join sys.syscolumns a1
		on ( s.fkeyid = a1.id And s.fkey = a1.colid )
	Inner join syscolumns a2
		on ( s.rkeyid = a2.id And s.rkey = a2.colid )
Order by Parent_Table,Child_Table

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So:

Step 1 : Create an SQL connection and open it

Step 2: Add the above query to a string variabe:

Dim mycommandas string ="object_name(rkeyid) Parent_Table,"
mycommandas =mycommandas +"object_name(fkeyid) Child_Table,"
........
.......
mycommandas =mycommandas +"Order by Parent_Table,Child_Table"


Step 3: Create a dataAdapter object and use it to fill a dataset with the results of the above command.
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Author Closing Comment

by:Murray Brown
ID: 39711081
Thanks very much
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