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SELECT DATEADD(mm, DATEDIFF(mm,0,getdate()), 0) 
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SELECT DATEADD(wk, DATEDIFF(wk,0,getdate()), 0)
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SELECT DATEADD(yy, DATEDIFF(yy,0,getdate()), 0)
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use pubs
go
select avg(distinct price)  --Ëãƽ¾ùÊý
from titles
where type='business'
go 
use pubs
go
select max(ytd_sales)  --×î´óÊý
from titles
go 
use pubs
go
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insert into mysql.user(Host,User,Password)
values("localhost","cordev",password("xasoftorg"));
insert into
mysql.user(Host,User,Password)
values("localhost","corhotfix",password("xasoftorg"));
insert into
mysq ......
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