比如select count(case when nvl(num,0) > 0 then 1) from tablename; 或者select count(1) from tablename where nvl(num,0) >0 这两个句子有区别吗?
最新回答
-她滥我情
2022-05-12 11:24:07
select * from 表 where 1=1 and (case when a=1 then a when 表.字段='asdfasdf' then b end)='值
ase when 变量a='provider' then 'cp.id' else {1} end 这就不是判断语句,这是赋值语句,where不能在后面 SQL code ? 1 2 3 4 SELECT CK.RESPERSON AS NAME FROM CP_KPI_INFO_FY CK, CP_DIM_PROVIDER CP WHERE CK.PROVIDERID = CP.ID AND CP.ID = case when 变量a='provider' then 'cp.id' else '{1}' end;