如何在vb.net的SQL查询中插入if语句？

Question

How to insert if/else in the query?

This is my sqlcommand query :

 sqlcommand ("select Machine_Code,Machine_Name,Status from
 Machine_Master where '" & combolinecode.Text & "' = Line_Code" )

I wanna change the value of Status from 1 => active and 0 => not active .

Answer 1

You can do this with the ANSI standard case statement in almost all databases:

select Machine_Code, Machine_Name,
       (case when Status = 1 then 'active' else 'not active' end) as status
from Machine_Master
where '" & combolinecode.Text & "' = Line_Code";

I fear that if you are using VBA you might be using Access, which has its own way:

select Machine_Code, Machine_Name,
       iif(Status = 1, "active", "not active") as status
from Machine_Master
where '" & combolinecode.Text & "' = Line_Code";

Answer 2

You can use case :

select Machine_Code
     , Machine_Name
     , (case when Status = 1 then 'active' else 'not active' end) as Status
from Machine_Master 
where '" & combolinecode.Text & "' = Line_Code