SELECT EXTRACT(DAY_HOUR FROM '2003-01-02 10:30:00.000123'); : EXTRACT « Date Time Functions « MySQL Tutorial

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MySQL Tutorial » Date Time Functions » EXTRACT 
14. 17. 21. SELECT EXTRACT(DAY_HOUR FROM '2003-01-02 10:30:00.000123');
mysql>
mysql> SELECT EXTRACT(DAY_HOUR FROM '2003-01-02 10:30:00.000123');
+-----------------------------------------------------+
| EXTRACT(DAY_HOUR FROM '2003-01-02 10:30:00.000123') |
+-----------------------------------------------------+
|                                                 210 |
+-----------------------------------------------------+
row in set (0.00 sec)

mysql>
14. 17. EXTRACT
14. 17. 1. EXTRACT(unit FROM date): extracts parts from the date rather than performing date arithmetic
14. 17. 2. SELECT EXTRACT(YEAR FROM '1999-07-02');
14. 17. 3. SELECT EXTRACT(YEAR_MONTH FROM '1999-07-02 01:02:03');
14. 17. 4. SELECT EXTRACT(DAY_MINUTE FROM '1999-07-02 01:02:03');
14. 17. 5. SELECT EXTRACT(MICROSECOND FROM '2003-01-02 10:30:00.000123');
14. 17. 6. SELECT EXTRACT(SECOND FROM '2003-01-02 10:30:00.000123');
14. 17. 7. SELECT EXTRACT(MINUTE FROM '2003-01-02 10:30:00.000123');
14. 17. 8. SELECT EXTRACT(HOUR FROM '2003-01-02 10:30:00.000123');
14. 17. 9. SELECT EXTRACT(DAY FROM '2003-01-02 10:30:00.000123');
14. 17. 10. SELECT EXTRACT(WEEK FROM '2003-01-02 10:30:00.000123');
14. 17. 11. SELECT EXTRACT(MONTH FROM '2003-01-02 10:30:00.000123');
14. 17. 12. SELECT EXTRACT(QUARTER FROM '2003-01-02 10:30:00.000123');
14. 17. 13. SELECT EXTRACT(SECOND_MICROSECOND FROM '2003-01-02 10:30:00.000123');
14. 17. 14. SELECT EXTRACT(MINUTE_MICROSECOND FROM '2003-01-02 10:30:00.000123');
14. 17. 15. SELECT EXTRACT(MINUTE_SECOND FROM '2003-01-02 10:30:00.000123');
14. 17. 16. SELECT EXTRACT(HOUR_MICROSECOND FROM '2003-01-02 10:30:00.000123');
14. 17. 17. SELECT EXTRACT(HOUR_SECOND FROM '2003-01-02 10:30:00.000123');
14. 17. 18. SELECT EXTRACT(HOUR_MINUTE FROM '2003-01-02 10:30:00.000123');
14. 17. 19. SELECT EXTRACT(DAY_MICROSECOND FROM '2003-01-02 10:30:00.000123');
14. 17. 20. SELECT EXTRACT(DAY_SECOND FROM '2003-01-02 10:30:00.000123');
14. 17. 21. SELECT EXTRACT(DAY_HOUR FROM '2003-01-02 10:30:00.000123');
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