dkfr.net
当前位置:首页 >> with As 用法 >>

with As 用法

如下: [TEST@ORA1] SQL>with cr as( 2 select * from tab) 3 select * from cr; TNAME TABTYPE CLUSTERID ------------------------------ ------- ---------- A TABLE TEST TABLE 详细的说明请参照: http://blog.163.com/wudataoge/blog/stat...

be famous for -- 因某事而出名, 例如: 空姐因拍A -- 片而出名 be famous to -- 对于...出名, 例如: 空姐对于整个世界来说都很出名 be famuse as -- 作为...而出名, 例如: 空姐作为一个女演员而世界闻名 be famous with -- 与be famous for的含...

是公用表表达式,可以理解为创建临时表。比如 WITH A AS(SELECT * FROM TABLE1) SELECT * FROM A

WITH 通常与AS连用,也叫做子查询部分。用法: 1). 可用来定义一个SQL片断,该片断会被整个SQL语句所用到。 2). 为了让SQL语句的可读性更高 3). 也有可能是在UNION ALL的不同部分,作为提供数据的部分。特别对于UNION ALL比较有 用。因为UNION A...

as 是连词所以用as时后面必须是从句,with 是介词,用with 时后面只能用名词性结构 + 非谓语动词,构成独立主格结构。 As the spring festival is approaching, I am becoming more homesick. With the spring festivsl approaching, I am becom...

as with: 与...一样 例句与用法: 1. The making of such a mold or cast, as with plaster of Paris. 制印模用石膏对这种模型或模子的制作,如用巴黎的石膏 2. One who lashes so as to secure or bind, as with a rope. 捆绑者比如说用绳子固定...

with 是临时的结果集的命名,称为公用表表达式 (CTE)。源自简单查询,可以尝试很深层的用法。具体看看联机丛书吧,msdn上面有。 WITH cte (EmployeeID, ManagerID, Title) as ( SELECT EmployeeID, ManagerID, Title FROM HumanResources.Employ...

oracle10应该支持这样的写法: with a as (select * from test) select * from a; oracle11支持这样的写法: with c(no,name,address) as (select id,name,addr from test where id=1 or id=2) select * from c;

access的查询是可以保存的,保存后可以当做视图来用。举例: 比如这么个表: 随便写个查询,统计姓张和姓李各有多少个人吧: select left(姓名,1) as 姓,count(*) as 人数 from 员工表 group by left(姓名,1)ctrl+S保存,查询名就起“查询1” 然后...

一、with必须紧跟引用的select语句,而不是delete,update,merge等,代码如下: update dest b set b.NAME=( with t as ( select * from temp ) select a.NAME from temp a where a.ID=b.ID ) 二、 WITH AS短语,也叫做子查询部分(subquery facto...

网站首页 | 网站地图
All rights reserved Powered by www.dkfr.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com