To get the different columns between 2 tables.

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SQL-Server

SQL-Server-2008

Hi,
Is there any tool or query inorder to get the difference between 2 tables in sql server..

Thanks,
P.Siva

Posted 21-Jul-13 20:45pm

Member 9848727

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3 solutions

Solution 2

Hi, this should get you work. This query returns the columns that exist only in the first table.

SQL

SELECT * FROM (SELECT t.name AS table_name,
			SCHEMA_NAME(schema_id) AS schema_name,
			c.name AS column_name
			FROM sys.tables AS t
			INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
			WHERE t.name = 'Table1') T1
LEFT JOIN (
			SELECT t.name AS table_name,
			SCHEMA_NAME(schema_id) AS schema_name,
			c.name AS column_name
			FROM sys.tables AS t
			INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
			WHERE t.name = 'Table2') T2 ON T2.column_name=T1.column_name
WHERE T2.column_name Is Null

Posted 21-Jul-13 21:14pm

Josef Andrys

Comments

Member 9848727 22-Jul-13 3:20am

This is not working. I will clearly explain you.
I have two tables as following

tableA:
EMPid name company

TableB
EMPId Name qualification company

Now i want the output as follows
Qualification

It should return only one column(Qualification) because it is the only column which is different between 2 tables

Maciej Los 22-Jul-13 5:19am

Do not repost anwers! Better way is to use "Improve question" widget.

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Josef Andrys · Accepted Answer · 2013-07-21T21:42:00

If I understood correctly. Just edit the query to return the difference of the second table

SQL

SELECT T2.column_name FROM (SELECT t.name AS table_name,
			SCHEMA_NAME(schema_id) AS schema_name,
			c.name AS column_name
			FROM sys.tables AS t
			INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
			WHERE t.name = 'tableA') T1
RIGHT JOIN (
			SELECT t.name AS table_name,
			SCHEMA_NAME(schema_id) AS schema_name,
			c.name AS column_name
			FROM sys.tables AS t
			INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
			WHERE t.name = 'tableB') T2 ON T2.column_name=T1.column_name
WHERE T1.column_name Is Null

vinayoukuri · Accepted Answer · 2013-07-22T01:10:00

SQL

select c.name as 'colname'
from sys.tables t , sys.columns c
where t.object_id = c.object_id and t.name  like '%tableA%'

except

select c.name as 'colname'
from sys.tables t , sys.columns c
where t.object_id = c.object_id and t.name  like '%tableB%'

-----------------------------------------------------------------------------------------

SQL

select c.name as 'colname'
from sys.tables t , sys.columns c
where t.object_id = c.object_id and t.name  like '%TableB%'

except

select c.name as 'colname'
from sys.tables t , sys.columns c
where t.object_id = c.object_id and t.name  like '%TableA%'

Please execute above queries together to know the differences

To get the different columns between 2 tables.

3 solutions

Solution 2

Solution 3

Solution 4

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