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Asked: 2026-05-11T01:58:18+00:00

I think this should be easy, but it’s evading me. I’ve got a many-to-many

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I think this should be easy, but it’s evading me. I’ve got a many-to-many relationship between Accounts and Account Groups. An Account can be in zero or more Groups, so I’m using the standard join table.

Accounts  -------- ID BankName AcctNumber Balance  AccountGroups ------------- ID GroupName  JoinAccountsGroups ------------------ AID GID

I’m using MS Access, FWIW. Also, this is for a low-bandwidth situation, so code optimization isn’t as important as simplicity/readability.

I’m using php as a presentation layer, so a bare-bones result from Access is fine.

As for what to do with the multi-result situation, I actually have two things I’m trying to build. The first lists all the groups in one column thus:

Bank       AcctNum       Balance    Groups --------|--------------|----------|---------------- Citi       930938        400        Payroll HSBC       8372933       100        Monthly, Payroll Wells      09837         800        - Chase      8730923       250        Monthly

The second is a master-detail list:

Name          AcctNum    Balance ------------|----------|---------- Payroll (2)              500   Citi        930938     400   HSBC        8372933    100          .................................. Monthly (2)              350   HSBC        8372933    100            Chase       8730923    250 .................................. Wells         09837      800

For the master-detail, my plan was just to get a big result set from the db, and munge it in php as needed. Since there’s going to be some significant post-processing in php anyway, maybe I should just do three separate queries and do the joining there. (Since I’m more comfortable with that language.)

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    SELECT a.BankName, a.AcctNumber, a.Balance, ag.GroupName FROM (Accounts a        LEFT JOIN JoinAccountsGroups jag        ON a.ID = jag.AID)        LEFT JOIN AccountGroups ag       ON jag.GID = ag.GroupName;

    Will select the data for the first table, however to concatenate the groups (Monthly, Payroll), you would need a User Defined Function (UDF), wich would not be available to Jet, so processing in PHP would be necessary.

    You may wish to read Understanding SQL Joins. It refers to MySQL but applies to Jet, for the most part.

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