【pgsql】用SQL语句查某一张表的约束

【样例】查询本地pg数据库中pt_dxsl_4413020001_12298这个表的约束条件有哪些？

SELECT
     tc.constraint_name, tc.table_name, kcu.column_name, 
     ccu.table_name AS foreign_table_name,
     ccu.column_name AS foreign_column_name,
     tc.is_deferrable,tc.initially_deferred
 FROM 
     information_schema.table_constraints AS tc 
     JOIN information_schema.key_column_usage AS kcu ON tc.constraint_name = kcu.constraint_name
     JOIN information_schema.constraint_column_usage AS ccu ON ccu.constraint_name = tc.constraint_name
 WHERE  tc.table_name = 'pt_dxsl_4413020001_12298'; 

上面SQL语句的查询结果.png

编写于 2024-03-11