oracle: select t.table_name,t.num_rows from user_tables t ORDER BY NUM_ROWS DESC; mysql: use information_schema;select table_name,table_rows from tableswhere TABLE_SCHEMA = 'test'order by table_rows desc;
源地址:http://blog.csdn.net/zhanggnol/article/details/6683697 select t.table_name,t.num_rows from user_tables t ORDER BY NUM_ROWS DESC; 还可以直接查看dblink的:select t.table_name,t.num_rows from user_tables@dblink t ORDER BY NUM_ROWS DESC;
源地址:http://blog.csdn.net/zhanggnol/article/details/6683697 select t.table_name,t.num_rows from user_tables t ORDER BY NUM_ROWS DESC; 还可以直接查看dblink的:select t.table_name,t.num_rows from user_tables@dblink t ORDER BY NUM_ROWS DESC;
select t.table_name,t.num_rows from user_tables t ORDER BY NUM_ROWS DESC; 还可以直接查看dblink的:select t.table_name,t.num_rows from user_tables@dblink t ORDER BY NUM_ROWS DESC;
ORACLE根据账号查询每张表数据量: select t.table_name,t.num_rows from user_tables t ORDER BY NUM_ROWS DESC; SQL SERVER查询总数据量: SELECT SUM(记录条数) AS 总记录数 FROM (SELECT TOP (10000) a.name AS 表名, MAX(b.rows) AS 记录条数 FROM sys.sysobjects AS a INNER JOIN sys.sysindexes AS
在使用桦仔的分享一个SQLSERVER脚本(计算数据库中各个表的数据量和每行记录所占用空间)的脚本时,遇到下面一些错误 这个是因为这些表的Schema是Maint,而不是默认的dbo,造成下面这段SQL在执行EXEC sp_spaceused @tablename时出现 Msg 15009, Level 16, State 1, Procedure sp_spaceused, Line 75 The object 'xxxx' does not exist in database 'YourSQ
向oracle中的表插入数据的方法有以下几种: 假设表名为User 第一种方法:select t.*,rowid from User t;-->点击钥匙那个标记就可向表中添加数据 第二种方法:select t.*,rowid from User t for update;-->点击钥匙那个标记就可向表中添加数据 第三种方法:在oracle中的table表中选中你要添加数据的那个表-->点击右键-->选中Edit data-->就可向表中添加数据 第四种方法:通过DAO层来添加
本文转载自:http://hi.baidu.com/ajyajyajy/item/4e2a7f4dc83393d2c1a592c1 use DBNAMEgoselect * from sysobjects where xtype='U'; --这是查询所有表的信息select count(*) from sysobjects where xtype='U' --这是查询表的数量 select a.name, b.rows from sysobjects a with(nolock) join
查看所有表对应的数据量 SELECT a.name AS 表名, MAX(b.rows) AS 记录条数 FROM sys.sysobjects AS a INNER JOIN sys.sysindexes AS b ON a.id = b.id WHERE (a.xtype = 'u') GROUP BY a.name ORDER BY 记录条数 DESC 查看数据库的总数据量 SELECT SUM(记录条数) AS 总记录数 ) a.name AS 表名, MAX(b.rows) AS 记录
##查看所有表信息 SELECT * FROM information_schema.TABLES WHERE TABLE_SCHEMA = 'pcms-zgh20190327' ##查看各个表数据量 SELECT table_name,table_rows FROM information_schema.tables WHERE TABLE_SCHEMA = 'pcms-zgh20190327' ORDER BY table_rows DESC;
场景:对2千万个数据,修改他们的名字加上后缀“生日”. 普通sql: and not regexp_like(title, '生日'); 优化sql: declare type rid_Array is table of rowid index by binary_integer; v_rid rid_Array; v_Count PLS_INTEGER :; v_Cur sys_refcursor; v_SQL ) := 'select t.rowid from calendar_inf
