CODEWITHSUNDEEP
sql-serversql-server-2008sql-server-2012
skiskd
skiskd

Reputation: 423

How to get all table reference by any table?

Let say I have table tblDept, and it has primary key deptid and this is reference by other table also. Means I know one table tblEmp where deptid is referenced from tblDept’s primary key deptid. Now I want to know how many table uses deptid as referect key(foreign key).

Please suggest only MS sql server.

Upvotes: 1

Views: 53

Answers (1)

J-D
J-D

Reputation: 1575

The below query will solve your purpose.

SELECT
K_Table = FK.TABLE_NAME,
FK_Column = CU.COLUMN_NAME,
PK_Table = PK.TABLE_NAME,
PK_Column = PT.COLUMN_NAME,
Constraint_Name = C.CONSTRAINT_NAME
FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS C
INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS FK ON C.CONSTRAINT_NAME = FK.CONSTRAINT_NAME
INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS PK ON C.UNIQUE_CONSTRAINT_NAME = PK.CONSTRAINT_NAME
INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE CU ON C.CONSTRAINT_NAME = CU.CONSTRAINT_NAME
INNER JOIN (
SELECT i1.TABLE_NAME, i2.COLUMN_NAME
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS i1
INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE i2 ON i1.CONSTRAINT_NAME = i2.CONSTRAINT_NAME
WHERE i1.CONSTRAINT_TYPE = 'PRIMARY KEY'
) PT ON PT.TABLE_NAME = PK.TABLE_NAME 
--optional where condition
where CU.COLUMN_NAME = 'KeyId'

Upvotes: 2

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