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mysqlsql

Split comma separated string into rows in mysql

When I have string list like 1, 2, 3... I'd like to use this as one column

Ids
1
2
3

Is it possible by sql query?

ex) SELECT Ids from (1, 2, 3...) <- I know this is not working.

Solution

  • Use a subquery of arbitrary digits to split your string.Instead of vals you can use '1,2,3'.

    SELECT
  DISTINCT SUBSTRING_INDEX(SUBSTRING_INDEX(vals, ',', n.digit+1), ',', -1) val
FROM
  tt1
  INNER JOIN
  (SELECT 0 digit UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3  UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6) n
  ON LENGTH(REPLACE(vals, ',' , '')) <= LENGTH(vals)-n.digit;

    See it working