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SQL functions
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| COALESCE ---> COALESCE(column, default) | |
| INTERVAL ---> DATE(time_column) + INTERVAL 1 DAY | |
| TIMESTAMPDIFF ---> TIMESTAMPDIFF(SECOND, '2012-12-12: 12:12:12', '2013-13-13 13:13:13') --DAY/MINUTE/HOUR/YEAR |
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