微客导航 » 文章资讯 » MySQL从日期格式中提取年份？

MySQL从日期格式中提取年份？

2024-05-18 17:11:04 396

要从日期格式中提取年份，可以使用MySQL的内置函数YEAR()。查询如下-

SELECT YEAR(curdate()) as OnlyYearFromCurrentDate;

以下是输出-

+-------------------------+
| OnlyYearFromCurrentDate |
+-------------------------+
| 2018                    |
+-------------------------+
1 row in set (0.00 sec)

或者您可以按照以下方式做-

SELECT YEAR(date(now())) as OnlyYearFromCurrentDate;

以下是输出-

+-------------------------+
| OnlyYearFromCurrentDate |
+-------------------------+
| 2018                    |
+-------------------------+
1 row in set (0.00 sec)

这样，当column为varchar时，您甚至可以实现此目的。让我们首先创建一个表-

create table ExtractYearDemo
   −> (
   −> YourDueTime varchar(200)
   −> );

借助insert命令将记录插入表中。查询如下-

insert into ExtractYearDemo values('27-10-2011');

insert into ExtractYearDemo values('28-11-2012');

insert into ExtractYearDemo values('29-12-2018');

insert into ExtractYearDemo values('01-01-2019');

在SELECT语句的帮助下显示表中的所有记录。查询如下-

select *from ExtractYearDemo;

以下是输出-

+-------------+
| YourDueTime |
+-------------+
| 27-10-2011  |
| 28-11-2012  |
| 29-12-2018  |
| 01-01-2019  |
+-------------+
4 rows in set (0.00 sec)

以下是当列为varchar类型时要从表列中提取年份的查询-

select YEAR(STR_TO_DATE(yourDueTime, "%d-%m-%Y")) As OnlyYearFromDate from ExtractYearDemo;

以下是显示年份的输出-

+------------------+
| OnlyYearFromDate |
+------------------+
|             2011 |
|             2012 |
|             2018 |
|             2019 |
+------------------+
4 rows in set (0.00 sec)

返回顶部
3162201930
czq8825@qq.com

MySQL从日期格式中提取年份？

热门推荐

随机推荐