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技术学院通过以下MySQL查询的帮助，我们可以获取当前月份的第一天 −
mysql> SELECT DATE_SUB(LAST_DAY(NOW()),INTERVAL DAY(LAST_DAY(NOW()))- 1 DAY) AS 'FIRST DAY OF CURRENT MONTH'; +----------------------------+ | FIRST DAY OF CURRENT MONTH | +----------------------------+ | 2017-10-01 | +----------------------------+ 1 row in set (0.00 sec)
LAST_DAY(NOW()),INTERVAL DAY(LAST_DAY(NOW()))-
1 DAY) AS 'FIRST DAY OF CURRENT MONTH';
+----------------------------+
| FIRST DAY OF CURRENT MONTH |
+----------------------------+
| 2017-10-01 |
+----------------------------+
1 row in set (0.00 sec)