在oracle中查询已知表名的表中所有字段名,每个字段是否是主键,是否是外键,是否为空的sql语句

时间:2021-08-12 09:56:50
查询表的所有列及其属性:
select t.*,c.COMMENTS
from user_tab_columns t,user_col_comments c
where t.table_name = c.table_name and t.column_name = c.column_name and t.table_name = women;
查找表的主键:
select cu.*
from user_cons_columns cu, user_constraints au
where cu.constraint_name = au.constraint_name and au.constraint_type = 'P' and au.table_name = women;
查找表的外键(包括名称,引用表的表名和对应的键名,下面是分成多步查询):
select * from user_constraints c where c.constraint_type = 'R' and c.table_name = women
查询外键约束的列名:
select * from user_cons_columns cl where cl.constraint_name = 外键名称;
查询引用表的键的列名:
select * from user_cons_columns cl where cl.constraint_name = 外键引用表的键名;