Oracle查询数据库中所有表的记录数

Oracle查询数据库中所有表的记录数

查询库中的表名和表中记录数：

SELECT T.TABLE_NAME, T.NUM_ROWS FROM USER_TABLES T;

查询库中记录总数：

SELECT SUM(A.NUM_ROWS)   FROM (SELECT T.TABLE_NAME, T.NUM_ROWS FROM USER_TABLES T) A;

如图所示：

1、用户操作

select * from dba_users;create user test identified by 123456;alter user test identified by 123456;grant connect,resource to test ;alter user test quota unlimited on users;drop user test cascade;

2、用户

select * from user_users; 查看当前用户的角色select * from user_role_privs; 查看当前用户的系统权限和表级权限select * from user_sys_privs;select * from user_tab_privs;

3、表

查看用户下所有的表select * from user_tables; 查看某表的创建时间select * from user_objects where object_name=upper('test'); 查看某表的大小select sum(bytes)/(1024*1024) as "size(M)" from user_segments where segment_name=upper('test');

4、索引

查看索引个数和类别select index_name,index_type,table_name from user_indexes order by table_name; 查看索引被索引的字段select * from user_ind_columns where index_name=upper('&index_name'); 查看索引的大小select sum(bytes)/(1024*1024) as "size(M)" from user_segments where segment_name=upper('&index_name');

5、序列号

查看序列号，last_number是当前值select * from user_sequences;

6、视图

select * from user_views;

7、存储函数和过程

查看函数和过程的状态select object_name,status from user_objects where object_type='FUNCTION'; select object_name,status from user_objects where object_type='PROCEDURE'; 查看函数和过程的源代码select text from all_source where owner=user and name=upper('&plsql_name');

8、SQL时间计算

SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -1), 'yyyyMMdd') SYY FROM DUAL;  --计算上一个月

9、Oracle的connect by level的使用