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| MySQL > select * from luxes where id = '657';
+-----+---------------------+------+---------------------+---------------------+
| id | recorded_at | lux | created_at | updated_at |
+-----+---------------------+------+---------------------+---------------------+
| 657 | 2016-11-27 15:44:34 | 1530 | 2016-11-27 15:44:34 | 2016-11-27 15:44:34 |
+-----+---------------------+------+---------------------+---------------------+
1 row in set (0.00 sec)
MySQL > select * from luxes where id = '657 ';
+-----+---------------------+------+---------------------+---------------------+
| id | recorded_at | lux | created_at | updated_at |
+-----+---------------------+------+---------------------+---------------------+
| 657 | 2016-11-27 15:44:34 | 1530 | 2016-11-27 15:44:34 | 2016-11-27 15:44:34 |
+-----+---------------------+------+---------------------+---------------------+
1 row in set (0.00 sec)
MySQL > select * from luxes where id = '657 abc';
+-----+---------------------+------+---------------------+---------------------+
| id | recorded_at | lux | created_at | updated_at |
+-----+---------------------+------+---------------------+---------------------+
| 657 | 2016-11-27 15:44:34 | 1530 | 2016-11-27 15:44:34 | 2016-11-27 15:44:34 |
+-----+---------------------+------+---------------------+---------------------+
1 row in set, 1 warning (0.00 sec)
MySQL > select * from luxes where created_at = '2016-11-27 15:44:34';
+-----+---------------------+------+---------------------+---------------------+
| id | recorded_at | lux | created_at | updated_at |
+-----+---------------------+------+---------------------+---------------------+
| 657 | 2016-11-27 15:44:34 | 1530 | 2016-11-27 15:44:34 | 2016-11-27 15:44:34 |
+-----+---------------------+------+---------------------+---------------------+
1 row in set (0.01 sec)
MySQL > select * from luxes where created_at = '2016-11-27';
Empty set (0.00 sec)
MySQL > select * from luxes where created_at = '2016-11-27 ';
Empty set (0.00 sec)
|
普段あんまりこういう事しないから気付いてなかったけど、Datetime型が時間の部分切り捨てられてない事から、やっぱInt型カラムに対してやった場合はこういう仕様なんかなー
と、とあるバグ対応を見て思ったので忘れないようメモ
MySQL 5.6 リファレンスマニュアル 12.3.2 比較関数と演算子