sqlserver语句,sqlserver语句转mysql

sqlserver怎么用语句创建数据库

创建数据库语句：CREATE DATABASE pyrhon_7 charset utf8 ；pyrhon_7为数据库名称

SQLServer 语句怎么写

嵌套比较多，你慢慢看。

select D.address, D.time, D.value

from (select A.address, A.time, A.value

from A

union

select B.address, B.time, B.value

from B) D,

(select C.Address, max(C.time) as maxTime

from (select A.address, A.time, A.value

from A

union

select B.address, B.time, B.value

from B) C

group by C.address) E

where D.address = E.address

and D.time = E.maxTime

sqlserver 的sql语句 急急急！

select a.tid,b.name,b.number,b.title ,COUNT(a.tid) AS Nb

from stu a, tea b

where b.number=a.tnum and b.number like "3%";

GROUP BY a.tid,b.name,b.number,b.title

你使用了DISTINCT 表示你不希望有重复，但是又需要统计数量。

所以 使用group by 进行分组，然后统计一个数量即可。