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Editorial Team
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Asked: 2026-06-12T07:42:35+00:00

Check this fiddle for DB and tables SELECT p.* FROM Products p LEFT JOIN

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Check this fiddle for DB and tables

SELECT p.*
FROM Products p
LEFT JOIN offertran ot 
ON p.prod_id = ot.prod_id
LEFT JOIN Offers o
ON ot.offer_id =  (SELECT id FROM Offers 
                   Where dF<=3 AND dt>=3)

ORDER BY o.id DESC, 
          p.prod_id ASC
LIMIT 20

The Output is:

| PROD_ID | CATEGORY_ID | PROD_NAME |  BRAND | PRICE | STATUS |
---------------------------------------------------------------
|      p3 |          c1 |     prod3 | brand3 |  3000 | active |
|      p3 |          c1 |     prod3 | brand3 |  3000 | active |
|      p1 |          c1 |     prod1 | brand1 |  1000 | active |
|      p2 |          c2 |     prod2 | brand2 |  2000 | active |
|      p4 |          c2 |     prod4 | brand1 |  4000 | active |
|      p5 |          c1 |     prod5 | brand2 |  5000 | active |
|      p6 |          c2 |     prod6 | brand3 |  6000 | active |

But, here as you can see p3 is shown two times. I dont know why..
I had tried all the possible ways but I cant find any remedies.. 🙁

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1 Answer

  1. Editorial Team

    The problem in 

    LEFT JOIN Offers o
ON ot.offer_id =  (SELECT id FROM Offers 
                   Where dF<=3 AND dt>=3)

    You join ot.offer_id with constant values (there is no meaning you select them from offers table).

    The correct way:

    SELECT p.*
FROM Products p
LEFT JOIN offertran ot 
ON p.prod_id = ot.prod_id
LEFT JOIN Offers o
ON ot.offer_id = o.id AND o.dF<=3 AND o.dt>=3
ORDER BY o.id DESC, 
          p.prod_id ASC
LIMIT 20

    Look at this SQLFiddle

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