Solved

How do I join 4 Tables using VB6 and MS Access using SQL?

Posted on 2011-03-15
9
348 Views
Last Modified: 2012-05-11
I have 4 tables; Shifts, Employees, Locations, and Employee Types.

My Goal is to Select a group of shifts that fall within a date criteria and join all of the above tables. Here's what I came up with but it is obviously not working or I wouldn't be posting here :-(

Select * From Shifts LEFT JOIN Employees ON Employees.EmployeeID=Shifts.EmployeeID LEFT JOIN Location ON Location.LocationID=Shifts.LocationID LEFT JOIN EmployeeTypes ON EmployeeTypes.TypeID=Employees.EmployeeType Where Shifts.Begin < #16-Mar-2011 12:00:00 AM# And Shifts.End > #15-Mar-2011 12:00:00 AM# And (Shifts.Type = 2 OR Shifts.Type = 3)

The Location Table, may or may not have an entry in the table that corresponds with the Shifts.LocationID (ie: I want to support a location ID of 0 in the shifts table)

Some help with this SQL would really be appreciated!



0
Comment
Question by:DymaxionDeveloper
  • 3
  • 3
  • 2
  • +1
9 Comments
 
LVL 77

Expert Comment

by:peter57r
ID: 35138484
I can't see anything wrong in principle with the query, but where multiple joins are involved, Access requires lots of ( ) .
You would be better off creating the same query in the Access query designer and then copying the sql from that.
0
 
LVL 120

Accepted Solution

by:
Rey Obrero (Capricorn1) earned 500 total points
ID: 35138571
try this

SELECT Shifts.*
FROM ((Shifts LEFT JOIN Employees ON Shifts.EmployeeID = Employees.EmployeeID) LEFT JOIN Location ON Shifts.LocationID = Location.LocationID) LEFT JOIN EmployeeTypes ON Employees.EmployeeType = EmployeeTypes.TypeID
Where Shifts.Begin < #16-Mar-2011 12:00:00 AM# And Shifts.End > #15-Mar-2011 12:00:00 AM# And (Shifts.Type = 2 OR Shifts.Type = 3)
0
 
LVL 51

Expert Comment

by:HainKurt
ID: 35139067
do you get any data for thisa

Select *
From
Shifts LEFT JOIN Employees ON Employees.EmployeeID=Shifts.EmployeeID
LEFT JOIN Location ON Location.LocationID=Shifts.LocationID
LEFT JOIN EmployeeTypes ON EmployeeTypes.TypeID=Employees.EmployeeType
Where (Shifts.Type = 2 OR Shifts.Type = 3)

0
3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

 
LVL 51

Expert Comment

by:HainKurt
ID: 35139141
try this too

Select * 
  From (select * 
          from Shifts 
         where Shifts.Begin < #16-Mar-2011 12:00:00 AM# And Shifts.End > #15-Mar-2011 12:00:00 AM# And (Shifts.Type = 2 OR Shifts.Type = 3)
       ) as s 
       LEFT JOIN Employees as e ON e.EmployeeID=s.EmployeeID
       LEFT JOIN Location as l ON l.LocationID=s.LocationID 
       LEFT JOIN EmployeeTypes as et ON et.TypeID=e.EmployeeType

Open in new window

0
 

Author Comment

by:DymaxionDeveloper
ID: 35139481
This does not work, there error I get is: Syntax Error (Missing Operator) in Query expression <SQL>

Error number 3075
0
 
LVL 120

Expert Comment

by:Rey Obrero (Capricorn1)
ID: 35139541
which one is not working?
0
 

Author Comment

by:DymaxionDeveloper
ID: 35140157
Both responded by HainKurt
0
 
LVL 120

Expert Comment

by:Rey Obrero (Capricorn1)
ID: 35140197
did you try the post at http:#a35138571
0
 
LVL 51

Expert Comment

by:HainKurt
ID: 35140464
put some (..)
Select * 
  From (((select * 
          from Shifts 
         where Shifts.Begin < #16-Mar-2011 12:00:00 AM# And Shifts.End > #15-Mar-2011 12:00:00 AM# And (Shifts.Type = 2 OR Shifts.Type = 3)
       ) as s 
       LEFT JOIN Employees as e ON e.EmployeeID=s.EmployeeID) 
LEFT JOIN Location as l ON l.LocationID=s.LocationID)
LEFT JOIN EmployeeTypes as et ON et.TypeID=e.EmployeeType

Open in new window

0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

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

In a multiple monitor setup, if you don't want to use AutoCenter to position your popup forms, you have a problem: where will they appear?  Sometimes you may have an additional problem: where the devil did they go?  If you last had a popup form open…
Confronted with some SQL you don't know can be a daunting task. It can be even more daunting if that SQL carries some of the old secret codes used in the Ye Olde query syntax, such as: (+)     as used in Oracle;     *=     =*    as used in Sybase …
Using Microsoft Access, learn some simple rules for how to construct tables in a relational database. Split up all multi-value fields into single values: Split up fields that belong to other things into separate tables: Make sure that all record…
With Microsoft Access, learn how to specify relationships between tables and set various options on the relationship. Add the tables: Create the relationship: Decide if you’re going to set referential integrity: Decide if you want cascade upda…

803 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