Check if a column is a key

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SQL

Is there a way in SQL to check whether a column is a Primary or Foreign key?

Posted 25-Apr-11 1:56am

DominicZA

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Toniyo Jackson · Accepted Answer · 2011-04-25T02:06:00

Solution 1

Try this.

SELECT constraint_type
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS a, INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE b
WHERE a.table_name='table_name'
AND a.constraint_name=b.constraint_name
AND b.column_name ='column_name';

Posted 25-Apr-11 2:06am

Toniyo Jackson

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[no name] 25-Apr-11 8:40am

good answer