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Editorial Team
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Asked: 2026-06-06T12:13:04+00:00

SELECT CategoryID, CategoryName FROM testcategory WHERE CategoryID NOT IN ( SELECT ChildMuzeCategoryID FROM testsubcategory

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SELECT CategoryID, CategoryName
FROM testcategory
WHERE CategoryID NOT 
IN (
  SELECT ChildMuzeCategoryID
  FROM testsubcategory
)

First table contain 75k
Second table contain 45k records

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1 Answer

  1. Editorial Team

    Try to use join:

    SELECT CategoryID, CategoryName
FROM testcategory
LEFT JOIN testsubcategory ON testcategory.CategoryID = testsubcategory.ChildMuzeCategoryID
WHERE testsubcategory.ChildMuzeCategoryID IS NULL
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