--查询主键
SELECT a.OWNER as "模式名",a.TABLE_NAME as "表名",b.COLUMN_NAME as "列名", a.CONSTRAINT_NAME as "约束名" from DBA_CONSTRAINTS a, ALL_CONS_COLUMNS b where a.CONSTRAINT_NAME=b.CONSTRAINT_NAME and CONSTRAINT_TYPE='P';
--查询外键
SELECT a.OWNER as "模式名",a.TABLE_NAME as "表名",b.COLUMN_NAME as "列名", a.CONSTRAINT_NAME as "约束名" from DBA_CONSTRAINTS a, ALL_CONS_COLUMNS b where a.CONSTRAINT_NAME=b.CONSTRAINT_NAME and CONSTRAINT_TYPE='R';