oracle中查询表的信息,包括表名,字段名,字段类型,主键,外键唯一性约束信息,索引信息查询SQL如下,希望对大家有所帮助:
select * from user_tables 可以查询出所有的用户表
select owner,table_name from all_tables; 查询所有表,包括其他用户表
通过表名过滤需要将字母作如下处理
select * from user_tables where table_name = upper('表名')
因为无论你建立表的时候表名名字是大写还是小写的, create语句执行通过之后,对应的user_tables表中的table_name字段都会自动变为大写字母, 所以必须通过内置函数upper将字符串转化为大写字母进行查询,否则,即使建表语句执行通过之后,通过上面的查询语句仍然查询不到对应的记录。
select * from user_indexes
select * from user_indexes where uniqueness='NONUNIQUE'
select * from user_indexes where uniqueness='UNIQUE'
select t.*,i.index_type from user_ind_columns t,user_indexes i where t.index_name = i.index_name and t.table_name='NODE'
select cu.* from user_cons_columns cu, user_constraints au where cu.constraint_name = au.constraint_name and au.constraint_type = 'P' AND cu.table_name = 'NODE'
select column_name from user_cons_columns cu, user_constraints au where cu.constraint_name=au.constraint_name and cu.table_name='NODE'
select * from user_constraints c where c.constraint_type = 'R' and c.table_name='STAFFPOSITION'
select * from user_cons_columns cl where cl.constraint_name = 外键名称
select * from user_cons_columns cl where cl.constraint_name = 外键引用表的键名
select * from user_tab_columns where table_name=upper('表名');
select cname,coltype,width from col where tname=upper('表名');;
select object_name,created,status from user_objects where lower(object_type) in ('procedure','function');
select * from role_tab_privs ;
select * from user_indexes where table_name='表名' ;
select * from user_ind_columns where index_name=upper('&index_name');
PS:
select constraint_name, constraint_type,search_condition, r_constraint_name from user_constraints where table_name = upper('&table_name');
select c.constraint_name,c.constraint_type,cc.column_name from user_constraints c,user_cons_columns cc where c.owner = upper('&table_owner') and c.table_name = upper('&table_name') and c.owner = cc.owner and c.constraint_name = cc.constraint_name order by cc.position;
select view_name from user_views;
原文地址没有排版比较不太容易看:https://www.cnblogs.com/chuanzifan/archive/2012/05/13/2497717.html
SELECT
a.owner 主键拥有者,
a.table_name 主键表,
b.column_name 主键列,
c.owner 外键拥有者,
c.table_name 外键表,
d.column_name 外键列
FROM
user_constraints a
LEFT JOIN user_cons_columns b ON a.constraint_name = b.constraint_name
LEFT JOIN user_constraints c ON c.r_constraint_name = a.constraint_name
LEFT JOIN user_cons_columns d ON c.constraint_name = d.constraint_name
WHERE
a.constraint_type = 'P'
AND a.table_name = '表名' --需要查看主外键关系的表
ORDER BY
a.table_name