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Oracle根据外键名查关联的表

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2016-06-07 16:57:441240browse

1、查找表的所有索引(包括索引名,类型,构成列): select t.*,i.index_type from user_ind_columns t,user_indexes i

  1、查找表的所有索引(包括索引名,类型,构成列):

  select t.*,i.index_type from user_ind_columns t,user_indexes i where t.index_name = i.index_name and t.table_name = i.table_name and t.table_name = 要查询的表

  2、查找表的主键(包括名称,构成列):

  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 = 要查询的表

  3、查找表的唯一性约束(包括名称,,构成列):

  select column_name from user_cons_columns cu, user_constraints au where cu.constraint_name = au.constraint_name and au.constraint_type = 'U' and au.table_name = 要查询的表

  4、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 = 要查询的表

  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

  5、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 = 要查询的表 ......

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