I have table named x Here is the sample data in table x Column1_

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Editorial Team

Asked: May 22, 20262026-05-22T11:58:04+00:00 2026-05-22T11:58:04+00:00

I have table named x

Here is the sample data in table x

Column1____________
Column2______________
Column3

a ___________________ b______________________c

a2__________________b2______________________c

a3__________________b3______________________c2

a4_________________b4_______________________c3

The result I need in a new table is:

Column1____________
Column2______________
Column3

a3__________________b3______________________c2

a4_________________b4_______________________c3

I tried importing the values to a new table and applying a unique index on column 3 but the result i get out of it is

Column1____________
Column2______________
Column3

a__________________b______________________c

a3__________________b3______________________c2

a4_________________b4_______________________c3

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Editorial Team · Answer 1 · 2026-05-22T11:58:05+00:00

Editorial Team

SELECT * FROM x WHERE Column3 NOT IN 
  (SELECT Column3 FROM x GROUP BY Column3 HAVING COUNT(*) > 1)

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