CASE a WHEN 1 THEN b ELSE NULL END

CASE a WHEN 1 THEN b ELSE NULL END case when.then.else.endSQL实现如下功能用case when...then...else.end 实现当A=1时,那么B=1,否则B=0;C=0,否则C=1 SELECT CASE ABC.A WHEN'否' THEN'1' WHEN'是' THEN'-1' END AS 出入标识,ABC.B AS 数量,这两个字段相乘?SELECT CASE ABC.A WHEN'否' THEN'1' WHEN'是' THEN'-1' END AS 出入标识,ABC.B AS 数量,我想让这个两个相乘,即出入标识* case when then else end (case A.ZT when 1 then 's318' else null end)SELECT A.*,CONVERT(NVARCHAR(50),B.JJRQ,23) AS JJRQ FROM BXX A,JJD B where A.JJDBH=B.JJDBH and A.BZBH='YZ1-81-01' and A.SMARBH = (case A.ZT when 1 then 's318' else null end) ORDER BY B.JJRQ,A.BZBHA.SMARBH = 这段文字的意思update student　　set grade = (　　select grade from　　(　　select id,　　case when score> 90 then 'a'　　when score > 80 then 'b'　　when score > 70 then 'c'　　else 'd' end grade　　from student　　) a SUM(CASE WHEN ISNULL(A.ReceiveQty,0)>0 THEN 1 ELSE 0 END) AS SumReceiveRolls是什么意思?在储存过程中,这句是什么意思SUM(CASE WHEN ISNULL(A.ReceiveQty,0)>0 THEN 1 ELSE 0 END) AS SumReceiveRolls, SQL中Case When Then的用法.我想把Case When用在Where里,例如：如果R.conclusion='N'那么R.result的选择条件为'A'或'B'.WhereR.result in (case when R.conclusion = 'N' then ('A','B) End)这个写法总是报错说没有右括号.有什 --简单Case函数 CASE sex WHEN '1' THEN '男' WHEN '2' THEN '女' ELSE '其他' END --Case搜索函数 CASE请问这两种用法有什么区别,分别在什么情况下使用?--简单Case函数 CASE sex WHEN '1' THEN '男' WHEN '2' THEN '女' ELSE case when then else end 能用在条件判断上么比如select * from app a where --在这加case when 可以么?select * from app a where case when a.id = 1 then a.name = '22' else a.name = '33' A.then B.as C.than D.when c#开发cast( (case when b.pbproject_ID is null then 1 else 0 end) as bit ) as if (Convert.ToBoolean(this.grvQuery.GetDataRow(i)[xz]) == true){selected = true;}上面那个是条件 switch(a+b) { case 1 : case 3 : y = a + b ; break ; case 0 : case 5 : y = a - b ; break; } 请问case后面的数字0,switch(a==1){case 0:a=b;break;case 1:a++;} 英语翻译This shared library is then loaded into FLUENT (either at runtime or automatically when a case file is read) by a process called dynamic loading.其中括号内的CASE FILE在计算机里面的术语叫啥? do{ switch case‘a':case'A':case'e':case'E':case'i':case'I':case'o':case'O':case’u‘:case'U':v1+=1#includevoid main(){char c;int v0=0,v1=0;do{switch(c=getchar()){case'a':case'A':case'e':case'E':case'i':case'I':case'o':case'O':case'u':case'U':v1++ switch(a*a+b*b); { case 3 :case 1 :y=a+b; break; case 0 :y=b-a; break; }如何修改让这个程序正确啊 在SQL中可以使用MAX函数取两个数中较大的一个数吗?譬如取出A和B中较大的那一个,可以这样写吗?select max(a,b) from table如果不行,应该怎么用max 不用case when then