Detta ger dig en konsekutiv radnummer med 3
.
SELECT
(@cnt := @cnt + 1) AS rowNumber,
t.rowID
FROM myTable AS t
CROSS JOIN (SELECT @cnt := 0) AS dummy
WHERE t.CategoryID = 1
ORDER BY t.rowID ;
Resultat
| ROWNUMBER | ROWID | --------------------- | 1 | 1 | | 2 | 25 | | 3 | 33 | | 4 | 150 |