Home/ Questions/Q 6824671
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-26T21:55:46+00:00

I am facing problem with Inner join in Access Database. I have two table

  • 0

I am facing problem with Inner join in Access Database. I have two table having two column each. one is MID and other is DOB in both table. The name of first table is maintable and other is under5. I want to retrieve all those records that are present in under5 table after matching it with maintable so i used Inner join. the problem is there is a MID 10106 whose frequency in under5 table is 2 and in maintable it is 5 but after running the query the number of MID(10106) returned is 10( i guess the expected behaviour should be 2) which is really absurd. please help me to solve this problem.
This is my Query:

SELECT maintable.MID, maintable.DOB, Under5.MID, Under5.DOB
FROM under5
INNER JOIN maintable ON under5.MID=maintable.MID;
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The behaviour is abosolutely fine.

    Every row in Main Table will be matched with Every Row in inner table. As there are 5 rows in Main Table And two rows in inner table 5*2 = 10 rows

    Can there be any other way so that i could only retrieve those MID and DOB 
that is present in under5 table after matching it with maintable.

    try this

    SELECT distinct Under5.MID, Under5.DOB 
FROM under5, MainTable
where under5.mid = mainTable.mid
    • 0