Find rows based on non unique column in MySql

Question

Given the following table:

Column1 | Column2
10      | 200 
10      | 201
11      | 100
11      | 200
11      | 300
12      | 200
13      | 100
13      | 200
13      | 201
13      | 300

I wish to extract all rows where column2 contains the value 200 and 201 for each unique column1. The output should be:

10      | 200 
10      | 201
13      | 200
13      | 201

The table contains about 8 million rows and all the things I can come up with are rather slow.

Answer 1

Do it with:

SELECT
  t.*
FROM
  t
  INNER JOIN
    (SELECT
      Column1
    FROM
      t
    WHERE
      Column2 IN (200,201)
    GROUP BY
      Column1
    HAVING
      COUNT(DISTINCT Column2)>1) AS c
    ON t.Column1=c.Column1

-but note, this will output rows with all Column2 values (ie not only 200 and 201 ) if it's not an intention, filter them:

SELECT
  t.*
FROM
  t
  INNER JOIN
    (SELECT
      Column1
    FROM
      t
    WHERE
      Column2 IN (200,201)
    GROUP BY
      Column1
    HAVING
      COUNT(DISTINCT Column2)>1) AS c
    ON t.Column1=c.Column1
WHERE
  Column2 IN (200,201)

fiddle is available here .