how to find out the column dependencies of a table - sql-server

Question

I have written a query to find out column names of tables in the database.
SELECT
t.NAME AS TABLEName,
SCHEMA_NAME(schema_id) + '.' + c.name AS ColumnName
FROM
sys.tables t
INNER JOIN sys.columns c
ON c.object_id = t.object_id
WHERE OBJECT_NAME(c.object_id) LIKE '%Message%'
ORDER BY t.NAME
So far I've got the expected result, but whatever column I am looking I want to find out the dependency of column related tables. By executing the above query I am getting table names and column names.
How can I get the column related dependent tables?

Answer 1

Try this:
SELECT KCU1.TABLE_CATALOG,
KCU1.TABLE_SCHEMA,
KCU1.TABLE_NAME,
KCU1.COLUMN_NAME,
KCU2.TABLE_NAME AS REFERENCED_TABLE_NAME,
KCU2.COLUMN_NAME AS REFERENCED_COLUMN_NAME
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS KCU1
JOIN INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS AS RC
ON KCU1.CONSTRAINT_CATALOG = RC.CONSTRAINT_CATALOG
AND KCU1.CONSTRAINT_SCHEMA = RC.CONSTRAINT_SCHEMA
AND KCU1.CONSTRAINT_NAME = RC.CONSTRAINT_NAME
JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS KCU2
ON KCU2.CONSTRAINT_CATALOG = RC.UNIQUE_CONSTRAINT_CATALOG
AND KCU2.CONSTRAINT_SCHEMA = RC.UNIQUE_CONSTRAINT_SCHEMA
AND KCU2.CONSTRAINT_NAME = RC.UNIQUE_CONSTRAINT_NAME
AND KCU2.ORDINAL_POSITION = KCU1.ORDINAL_POSITION
WHERE KCU1.TABLE_NAME LIKE '%Message%'
ORDER BY
KCU1.TABLE_NAME,
KCU1.COLUMN_NAME

Answer 2

This might help. You will however need to tweak it a bit to suit your specific need:
SELECT OBJECT_NAME(referenced_major_id) AS ReferingObject,
(SELECT o.type_Desc FROM sys.objects o
WHERE o.object_id = d.referenced_major_id) AS ReferingObjType,
CASE WHEN referenced_minor_id <> 0 THEN COL_NAME(referenced_major_id, referenced_minor_id)
ELSE '' END AS RefColumnName,
OBJECT_NAME(object_ID) AS ReferencedObject,
(SELECT o.type_Desc FROM sys.objects o
WHERE o.object_id = d.object_id) AS ReferedObjType
fROM sys.sql_dependencies d

Answer 3

If you're looking for all tables/columns that reference a column in the table whose name contains token Message, you can use this:
;WITH PT AS (
SELECT
tc1.TABLE_NAME,
tc2.COLUMN_NAME
FROM
INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc1
JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE tc2
ON tc1.CONSTRAINT_NAME = tc2.CONSTRAINT_NAME
WHERE tc1.CONSTRAINT_TYPE = 'PRIMARY KEY')
SELECT
FK_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
JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS FK
ON C.CONSTRAINT_NAME = FK.CONSTRAINT_NAME
JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS PK
ON C.UNIQUE_CONSTRAINT_NAME = PK.CONSTRAINT_NAME
JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE CU
ON C.CONSTRAINT_NAME = CU.CONSTRAINT_NAME
JOIN PT
ON PT.TABLE_NAME = PK.TABLE_NAME
WHERE PK.TABLE_NAME LIKE '%Message%'
ORDER BY
FK.TABLE_NAME,
CU.COLUMN_NAME,
PK.TABLE_NAME,
PT.COLUMN_NAME