針對所有列值,在 Datetime 欄位中設定當前日期的 MySQL 查詢
我們首先建立一個表 -
mysql> create table DemoTable821(AdmissionDate datetime); Query OK, 0 rows affected (1.24 sec)
使用 insert 命令在表中插入一些記錄 -
mysql> insert into DemoTable821 values('2019-01-21'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable821 values('2018-11-02'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable821 values('2016-12-31'); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable821 values('2015-03-19'); Query OK, 1 row affected (0.17 sec)
使用 select 語句顯示錶中的所有記錄 -
mysql> select *from DemoTable821;
將會產生以下輸出 -
+---------------------+ | AdmissionDate | +---------------------+ | 2019-01-21 00:00:00 | | 2018-11-02 00:00:00 | | 2016-12-31 00:00:00 | | 2015-03-19 00:00:00 | +---------------------+ 4 rows in set (0.00 sec)
這是在 DateTime 欄位中設定當前日期的查詢 -
mysql> update DemoTable821 set AdmissionDate=CURDATE(); Query OK, 4 rows affected (0.74 sec) Rows matched: 4 Changed: 4 Warnings: 0
讓我們再次檢查表記錄 -
mysql> select *from DemoTable821;
將會產生以下輸出 -
+---------------------+ | AdmissionDate | +---------------------+ | 2019-08-03 00:00:00 | | 2019-08-03 00:00:00 | | 2019-08-03 00:00:00 | | 2019-08-03 00:00:00 | +---------------------+ 4 rows in set (0.00 sec)
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