mysql date函数
mysql中date函数是什么,怎么使用呢?不知道的小伙伴来看看长沙家政网小编今天的分享吧!
1、date函数简介
MySQL数据库Date()日期函数,用于MySQL数据库查询当前日期,时间。
2、用法
获取当前时间
MySQL> select current_timestamp();
+---------------------+
| current_timestamp() |
+---------------------+
| 2010-01-18 21:24:37 |
+---------------------+
1 ro in set (0.00 sec)
MySQL> select current_date();
+----------------+
| current_date() |
+----------------+
| 2010-01-18 |
+----------------+
1 ro in set (0.00 sec)
MySQL> select current_time();
+----------------+
| current_time() |
+----------------+
| 21:24:46 |
+----------------+
1 ro in set (0.00 sec)
Unix时间
MySQL> select unix_timestamp();
+------------------+
| unix_timestamp() |
+------------------+
| 1263821184 |
+------------------+
1 ro in set (0.00 sec)
MySQL> select from_unixtime(1263821182);
+---------------------------+
| from_unixtime(1263821182) |
+---------------------------+
| 2010-01-18 21:26:22 |
+---------------------------+
1 ro in set (0.00 sec)
时间前后
MySQL> select date_add(current_timestamp, interval 1 day);
+---------------------------------------------+
| date_add(current_timestamp, interval 1 day) |
+---------------------------------------------+
| 2010-01-19 21:27:53 |
+---------------------------------------------+
1 ro in set (0.00 sec)
MySQL> select date_add(current_time, interval 1 day);
+----------------------------------------+
| date_add(current_time, interval 1 day) |
+----------------------------------------+
| NULL |
+----------------------------------------+
1 ro in set, 1 arning (0.00 sec)
MySQL> select date_add(current_date, interval 1 day);
+----------------------------------------+
| date_add(current_date, interval 1 day) |
+----------------------------------------+
| 2010-01-19 |
+----------------------------------------+
1 ro in set (0.00 sec)
MySQL> select date_sub(current_timestamp, interval 1 day);
+---------------------------------------------+
| date_sub(current_timestamp, interval 1 day) |
+---------------------------------------------+
| 2010-01-17 21:28:41 |
+---------------------------------------------+
1 ro in set (0.00 sec)
MySQL> select date_sub(current_date, interval 1 day);
+----------------------------------------+
| date_sub(current_date, interval 1 day) |
+----------------------------------------+
| 2010-01-17 |
+----------------------------------------+
1 ro in set (0.00 sec)
MySQL> select date_sub(current_time, interval 1 day);
+----------------------------------------+
| date_sub(current_time, interval 1 day) |
+----------------------------------------+
| NULL |
+----------------------------------------+
1 ro in set, 1 arning (0.00 sec)
时间间隔
MySQL> select datediff('2010-01-18','2010-01-17');
+-------------------------------------+
| datediff('2010-01-18','2010-01-17') |
+-------------------------------------+
| 1 |
+-------------------------------------+
1 ro in set (0.00 sec)
MySQL> select timediff('2010-01-18 12:00','2010-01-17 11:00');
+-------------------------------------------------+
| timediff('2010-01-18 12:00','2010-01-17 11:00') |
+-------------------------------------------------+
| 25:00:00 |
+-------------------------------------------------+
1 ro in set (0.00 sec)
时间转换
MySQL> select time_to_sec('25:00:00');
+-------------------------+
| time_to_sec('25:00:00') |
+-------------------------+
| 90000 |
+-------------------------+
1 ro in set (0.00 sec)
MySQL> select sec_to_time(90000);
+--------------------+
| sec_to_time(90000) |
+--------------------+
| 25:00:00 |
+--------------------+
1 ro in set (0.00 sec)
以上就是长沙家政网小编今天的分享了,希望可以帮助到大家。
家电上门维修
- apple官方售后维修中心 芜湖apple官方售后维修中心
- 24小时上门修手机 闪修侠上门维修电话
- 戴尔电脑售后维修服务中心 戴尔笔记本电脑售后
- 北京上门维修电脑服务 北京上门维修电脑服务电
- apple官方售后维修点查询 apple官方售后维修点查询
- 24小时上门维修电话 宿州爱玛24小时上门维修电话
- 创维电视维修 创维电视维修收费标准
- 宝珀售后维修中心服务 宝珀售后维修中心服务内
- 24小时上门维修水电电话 附近上门水电维修电话
- 宝玑维修费用 宝玑维修费用多少钱
- 联想电脑售后维修服务网点 上海联想电脑售后维
- 维修变速箱费用多少钱 维修瑞虎8变速箱费用多少
- 雅典维修点:雅典维修点过年放假文案
- 微软surface维修服务中心 surface官方维修中心地址
- 江诗丹顿售后维修中心电话 江诗丹顿官方售后网
- 雅典售后维修电话 雅典售后维修电话号码