从 MySQL 日期时间中删除秒数?
mysqlmysqli database
要从 MySQL 日期时间中删除秒数，请使用 UPDATE 和 SET，语法如下 −
update yourTableName set yourDateColumnName=yourDateColumnName -second(yourDateColumnName);
首先我们创建一个表 −
mysql> create table DemoTable -> ( -> Shippingdatetime datetime -> ); Query OK, 0 rows affected (0.76 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values('2019-01-21 12:05:20');
Query OK, 1 row affected (0.25 sec)
mysql> insert into DemoTable values('2019-03-01 10:23:35');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('2019-06-09 11:00:56');
Query OK, 1 row affected (0.14 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
输出
+---------------------+ | Shippingdatetime | +---------------------+ | 2019-01-21 12:05:20 | | 2019-03-01 10:23:35 | | 2019-06-09 11:00:56 | +---------------------+ 3 rows in set (0.00 sec)
以下是从 MySQL 日期时间中删除秒数的查询 −
mysql> update DemoTable set Shippingdatetime=Shippingdatetime-second(Shippingdatetime); Query OK, 3 rows affected (0.15 sec) Rows matched: 3 Changed: 3 Warnings: 0
让我们再次检查表中的所有记录 −
mysql> select *from DemoTable;
输出
+---------------------+ | Shippingdatetime | +---------------------+ | 2019-01-21 12:05:00 | | 2019-03-01 10:23:00 | | 2019-06-09 11:00:00 | +---------------------+ 3 rows in set (0.00 sec)
