MySQL - How to get primary key of a table?

Question

Can anyone please tell me how to get the primary key of a table in MySQL?

Answer 1

Try this:

Solution 1:

This is from Ajons Answer

SELECT k.COLUMN_NAME
FROM information_schema.table_constraints t
LEFT JOIN information_schema.key_column_usage k
USING(constraint_name,table_schema,table_name)
WHERE t.constraint_type='PRIMARY KEY'
    AND t.table_schema=DATABASE()
    AND t.table_name='owalog';

Solution 2:

This is from alexn

SHOW KEYS FROM tablename WHERE Key_name = 'PRIMARY'

Solution 3:

SHOW INDEX FROM presort.final_conf_score_mld_run2 
WHERE Key_name = 'PRIMARY';