sql - SQL select multiple rows of data then compare

Question

What would be the best approach in SQL Server 2008 to select something that can contain 10 list of data, then compare that data with a specific value in one of it's columns

So something like this below

SELECT bType FROM WORK_STATION WHERE nFileId = 123456789

Which could return either 1 - 10 values MAX (will return at least one value). Then to compare the data from that SQL statement above that we just selected to a specific value to something like

if bType = 1
--DO something

What is the best approach of doing something like this?

Answer 1

declare @table as table(btype int)
declare @btype int

insert into @table
SELECT bType FROM WORK_STATION WHERE nFileId = 123456789

while(exists(select top 1 'x' from @table)) --as long as @table contains records continue
begin
   select top 1 @btype = btype from @table

   if(@btype = 10)
     print 'something'

   delete top (1) from @table --remove the previously processed row. also ensures no infinite loop
end 

Answer 2

我认为您可以使用 SP 声明变量，然后将其与结果集进行比较，如果您知道您只有 10 个值，您可以使用临时表并插入 10 个值。

我希望这是有帮助的。