如何在內部查詢條件中使用外部查詢列

Question

我想在select語句中使用子查詢，但我想將列數據傳遞給子查詢，以便它可以過濾正在處理的行的數據。我們如何做到這一點，甚至有可能？

select 
[SRP Code], [Master Code], [Product Desc], [Pack Desc],[Information], [Store], 

case when ([SRP Code] <> [Master Code]) 
then 
    isnull([38],0) + (select (e.stock/er.unit) as 'Stock' from erp_stock e join 
    erpcustomerlinking er on e.productcode = er.mastercode where 

    er.mastercode = [Master Code] <-- here I want the column 

    and weekno = 38  group by e.stock,er.unit) 
else 
    isnull([38],0) 
end as [38],[36],[37],[35],[39],[40],[41],[42],[43],[44],[45],[46],[47],[48],[49],[50] 

from [dbo].[F91FE39A-F618-40A8-A6F7-C721A379EE76] 

where [SRP Code] = 401794 

Answer 1

是的，這是可能的。

Create table test(id int, name varchar(20), age int); 
create table salary(id int, salary int, testid int); 

insert into test values(1,'jitu',12); 
insert into test values(2,'kapil',12);     
insert into test values(3,'ajay',12); 
insert into test values(4,'vijay',12); 

insert into salary values(1, 200, 1); 
insert into salary values(2, 300, 2); 
insert into salary values(3, 400, 3); 
insert into salary values(4, 500, 4); 

select *, (select salary from salary where test.id=testid) as Salary from test 

小提琴：http://sqlfiddle.com/#!2/717e9/3/0