标签：排序 fetch order log color first blog top cts
一些数据库笔记：[仅服务于自己，如果对你也有用，我很高兴]
查看数据库中的各个表名
SELECT NAME
FROM sys.tables
ORDER BY name
查看数据库各个表的数据量
SELECT a.name,b.rows FROM sysobjects a
INNER JOIN sysindexes b ON a.id=b.id
WHERE b.indid IN(0,1) AND a.Type=‘u‘
ORDER BY a.name
# 查数据库中各个表的表名及数据量,按数据量进行排序
SELECT a.name, b.rows
FROM sysobjects AS a INNER JOIN sysindexes AS b ON a.id = b.id
WHERE (a.type = ‘u‘) AND (b.indid IN (0, 1))
ORDER BY b.rows DESC
#查看所有数据表名
select table_name from user_tables
#查看每个数据表的数据量
select table_name,num_rows from user_tables
# 查数据库中各个表的表名及数据量,按数据量进行排序
select t.table_name,t.num_rows from user_tables t ORDER BY NUM_ROWS DESC
#查看每个数据表的数据量
select table_name,table_rows from tables order by table_rows desc
oracle: select * from tab where rownum <= 10; sql server: select top 10 * from tab mysql: select * from tab limit 10 db2: select * from tab fetch first 10 rows only
未完待续...
标签：排序 fetch order log color first blog top cts
原文地址：http://www.cnblogs.com/Hi-blog/p/6129518.html
