I am using a MS SQL db and I have 3 tables: ‘base_info’, ‘messages’, ‘config’
bases: ID Name NameNum ==================================== 1 Home 101 2 Castle 102 3 Car 103 messages: ID Signal RecBy HQ ============================ 111 120 Home 1 111 110 Castle 1 111 125 Car 1 222 120 Home 2 222 125 Castle 2 222 130 Car 2 333 100 Home 1 333 110 Car 2 config: ID SignalRec SignalOut RecBy HQ ==================================== 111 60 45 101 1 111 40 60 102 1 222 50 60 102 2 222 30 90 101 2 333 80 10 103 1 Ok so now I have a subquery in which I select the ‘SignalRec’ and ‘SignalOut’ from the config table and match it on the messages table by ID and Date(not included above), the problem is that I need it to match where messages.RecBy = config.RecBy but config.RecBy is a string but it’s equivalent Name is in the bases table. So I almost need to do a subquery inside a subquery or some type of join and compare the returned value.
Here is what I have so far:
(SELECT TOP 1 config.SignalRec from config WHERE config.ID = messages.ID AND ||I need th other comparison here||...Order By...) As cfgSignalRec, (SELECT TOP 1 config.SignalOut from config WHERE config.ID = messages.ID AND ||I need th other comparison here||...Order By...) As cfgSignalOut I tried to make this as clear as possible but if you need more info let me know.
I think I might have not been clear enough what I wanted to do, sorry about that. The data is actually different in the 2 tables, although the correlations are the same. It’s kind of confusing to explain without going into detail about how the system works.
I actually found a very fast way of doing this.
Inside my sub-query I do this:
So this essentially compares the 2 RecBy’s of different tables even though one is an integer and the other is a string. It reminds me of a match and look up in Excel.