Solved

Trying to take use variables in Access Jet SQL, possible?

Posted on 2007-03-23
6
276 Views
Last Modified: 2008-02-01
I'm trying to select a value from a table, but I'm trying to use a value from another table to tell which column to use. So basically I'm trying to use a variable. Here's what I'm trying to do:

SELECT TABLE2.(TABLE1.COL1) FROM TABLE2

What this is saying is that the value for table1.col1 is a heading for table2. Can I do this in Access via SQL?
0
Comment
Question by:bemara57
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 50

Expert Comment

by:Lowfatspread
ID: 18781719
you need to code it as an IIF i believe

e.g.  Select IIF(table1.col1 = 'x',X,Y) from table2
0
 
LVL 61

Expert Comment

by:mbizup
ID: 18781771
You can use VBA...

strSQL = "SELECT Table2." & dlookup("Col1", "TABLE1", "SomeField = SomeValue") & " FROM Table2"
                                                                                                ^^^-- criteria, if needed

The concatenated dlookup will allow for a variable field name.
This sql string can then be used in a recordsource, rowsource, etc.
0
 
LVL 39

Expert Comment

by:stevbe
ID: 18782003
you can use DLookup directly in a query, no need to use VBA.
0
Use Case: Protecting a Hybrid Cloud Infrastructure

Microsoft Azure is rapidly becoming the norm in dynamic IT environments. This document describes the challenges that organizations face when protecting data in a hybrid cloud IT environment and presents a use case to demonstrate how Acronis Backup protects all data.

 
LVL 39

Expert Comment

by:stevbe
ID: 18782007
how do you know which record in table1 to use?
0
 
LVL 44

Accepted Solution

by:
GRayL earned 500 total points
ID: 18783252
To clarify the answer from lowfatspread:

Select IIF(table1.col1="fld1",table2.fld1) FROM table1,table2 ON table1.ID=table2.ID;

There has to be some value (ID?) in table2 which restricts table1 to a single record.  This any clearer?
0
 
LVL 50

Expert Comment

by:Lowfatspread
ID: 18784591
thanks GRayL

0

Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A simple tool to export all objects of two Access files as text and compare it with Meld, a free diff tool.
In earlier versions of Windows (XP and before), you could drag a database to the taskbar, where it would appear as a taskbar icon to open that database.  This article shows how to recreate this functionality in Windows 7 through 10.
In Microsoft Access, learn different ways of passing a string value within a string argument. Also learn what a “Type Mis-match” error is about.
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question