这个sql怎么写？

SuperGam 2003-12-22 10:38:46

表table1:
结构如下
name,clientid,fy00,fy01,fy02,...............fy20;
其中clientid为string
fy00...fy20为money。
如果clientid的长度超过10则取fy00..fy20的负值。
怎么写。
谢谢各位了。

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SuperGam 2004-02-24

哪个速度快呢？

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gmlxf 2003-12-22

把马可的稍改一下：
select name,
clientid,
fy00*x as fy00,
fy01*x as fy01,
...
fy20*x as fy20
from ( select *,
(case when len(clientid)>10 then -1 else 1 end) as X
from table1
) a

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zjcxc 元老 2003-12-22

select name,clientid
,fy00=case when len(clientid)>10 then -fy00 else fy00 end
,fy01=case when len(clientid)>10 then -fy01 else fy01 end
...
,fy19=case when len(clientid)>10 then -fy19 else fy19 end
,fy20=case when len(clientid)>10 then -fy20 else fy20 end
from table1

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txlicenhe 2003-12-22

把中海的稍改一下：
select name,
clientid,
fy00*x as fy00,
fy01*x as fy01,
...
fy20*x as fy20
from ( select *,
(case when len(clientid)>10 then -1 else 1 end) as X
from table1
) b
on a.name=b.name

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victorycyz 2003-12-22

select name,
clientid,
fy00*x as fy00,
fy01*x as fy01,
...
fy20*x as fy20
from table1 a join
( select [name],
(case when len(clientid)>10 then -1 else 1 end) as X
from table1
) b
on a.name=b.name