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SELECT CONCAT_WS('-', HOUR('01:02:03'), MINUTE('01:02:03'), SECOND('01:02:03'))
| CONCAT_WS('-', HOUR('01:02:03'), MINUTE('01:02:03'), SECOND('01:02:03')) |
|---|
| 1-2-3 |
SELECT CONCAT_WS('-', HOUR('00:02:03'), MINUTE('00:02:03'), SECOND('00:02:03'))
| CONCAT_WS('-', HOUR('00:02:03'), MINUTE('00:02:03'), SECOND('00:02:03')) |
|---|
| 0-2-3 |