SQL中取得表中主键或其它信息

取得表中主键：

select primaryKey=COLUMN_NAME from INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE

WHERE CONSTRAINT_NAME=(select CONSTRAINT_NAME from INFORMATION_SCHEMA.TABLE_CONSTRAINTS

WHERE CONSTRAINT_TYPE='PRIMARY KEY' AND TABLE_NAME='表名')

 

取得表的其它有用信息： select * from INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE