case+when+sql语句

祁帜所4268SQL中CASE控制语句用法 -
卓哑政18417651934 ______ DECLARE @var int; CASE @var WHEN 1 THEN 'var is 1' WHEN 2 THEN 'var is 2' ELSE 'var is not 1 or 2' END

祁帜所4268sql语句case的用法 -
卓哑政18417651934 ______ select case when stcd='stcd' and tm between 'd1' and convert(varchar(100),year(dateadd(day,1,'d1'))) +'-'+convert(varchar(100),month(dateadd(day,1,'d1'))) +'-'+convert(varchar(100),day(dateadd(day,1,'d1'))) +' 8:00:00' then sum(drp) when stcd='...

祁帜所4268Select @sql = @sql + ',sum(case b when b then c else 0 end) '+b+'' -
卓哑政18417651934 ______ sum(case b when b then c else 0 end) 永远返回c sum(case b when '''+b+''' then c else 0 end) 当b 的取值为'b'时返回c ,其他值返回0

祁帜所4268计算分段函数:y=x^2+3x+2,x>20 ,y=sqr(3x) - 2,10<=x<=20 ,y=1/x+abs(x),0<x<10 -
卓哑政18417651934 ______ --假如x=32,或不在上述范围内时,y值为-1000,语句如下:Declare @X Int,@Y Int Set @X=32 Select @Y= Case When @X>20 Then Square(@X)+3*@X+2 When @X>=10 And @X When @X>0 And @X Else -1000 End Print @Y

祁帜所4268Sql 语句中的CASE ... WHEN ... THEN ... ELSE ... END -
卓哑政18417651934 ______ 不用case,用isnull函数即可 update News set Hits = IsNull( Hits, 0 ) + 1 where ID = 1

祁帜所4268SQL查询字段的说明 -
卓哑政18417651934 ______ 查出表的各个字段的所有属性SELECT 表名 = case when a.colorder=1 then d.name else '' end, 表说明 = case when a.colorder=1 then isnull(f.value,'') else...

祁帜所4268C语言中关于case语句 -
卓哑政18417651934 ______ 1.定义就免了 2.程序要求从键盘输入一字符,当输入的字符不为回车时始终执行do...while...

祁帜所4268sql语句问题:表有四个字段,A,B,C和D, 判断A的值为'1'则计算A+B,若A值为'0'则计算B+C -
卓哑政18417651934 ______ select case when a = 1 then a + b when a = 0 then b + c end abc from tabname where ...

祁帜所4268sql语句中如何统计一行里各个数字的个数 -
卓哑政18417651934 ______ select Q1,Q2.......Q11,case Q1 + Q2 + Q3 .... + Q11when 6 then '5个0'when 5 then '6个0'when 4 then '7ge0'end as cfrom table

祁帜所4268#include<stdio.h> main() { int s=0,k; for(k=7;k>=0;k - - ) { switch(k) { case 1; case 4; case 7; s++; -
卓哑政18417651934 ______ 首先,代码就是错的,可能是敲错了,case后面用:然后,分析一下代码,当k是1,4,7的时候,s+1;当k是5,0的时候s+2,其他时候不处理,于是 ,s=7