jachin/select_the_primary_key_for_a_table.sql

## select_the_primary_key_for_a_table.sql
SELECT k.column_name
FROM information_schema.table_constraints t
JOIN information_schema.key_column_usage k
USING(constraint_name,table_schema,table_name)
WHERE t.constraint_type='PRIMARY KEY'
  AND t.table_schema='db'
  AND t.table_name='tbl';
	SELECT k.column_name
	FROM information_schema.table_constraints t
	JOIN information_schema.key_column_usage k
	USING(constraint_name,table_schema,table_name)
	WHERE t.constraint_type='PRIMARY KEY'
	AND t.table_schema='db'
	AND t.table_name='tbl';