1、current_timestamp 函数
mysql> select current_timestamp;
+---------------------+
| current_timestamp |
+---------------------+
| 2021-07-26 14:39:27 |
+---------------------+
1 row in set (0.00 sec)
2、current_time 函数
mysql> select current_time;
+--------------+
| current_time |
+--------------+
| 14:40:39 |
+--------------+
1 row in set (0.00 sec)
3、current_date 函数
mysql> select current_date;
+--------------+
| current_date |
+--------------+
| 2021-07-26 |
+--------------+
1 row in set (0.00 sec)
4、now() 函数
mysql> select now();
+---------------------+
| now() |
+---------------------+
| 2021-07-26 14:42:48 |
+---------------------+
1 row in set (0.00 sec)
5、curdate() 函数
mysql> select curdate();
+------------+
| curdate() |
+------------+
| 2021-07-26 |
+------------+
1 row in set (0.00 sec)
6、curtime() 函数
mysql> select curtime();
+-----------+
| curtime() |
+-----------+
| 14:43:40 |
+-----------+
1 row in set (0.00 sec)
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