从基于特定月份的MySQL表中选择数据?
使用MONTH()
MySQL中的方法选择基于月份的日期。让我们首先创建一个表-
mysql> create table DemoTable-> (
-> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
-> UserName varchar(10),
-> UserPostMessageDate datetime,
-> UserLikes int
-> );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable(UserName,UserPostMessageDate,UserLikes)values('John','2019-01-31',4560);
mysql> insert into DemoTable(UserName,UserPostMessageDate,UserLikes)
values('Sam','2019-06-28',790);
mysql> insert into DemoTable(UserName,UserPostMessageDate,UserLikes)
values('Carol','2019-05-01',230);
mysql> insert into DemoTable(UserName,UserPostMessageDate,UserLikes)
values('David','2019-03-05',10000000);
使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
输出结果
这将产生以下输出-
+----+----------+---------------------+-----------+| Id | UserName | UserPostMessageDate | UserLikes |
+----+----------+---------------------+-----------+
| 1 | John | 2019-01-31 00:00:00 | 4560 |
| 2 | Sam | 2019-06-28 00:00:00 | 790 |
| 3 | Carol | 2019-05-01 00:00:00 | 230 |
| 4 | David | 2019-03-05 00:00:00 | 10000000 |
+----+----------+---------------------+-----------+
4 rows in set (0.00 sec)
以下是根据特定月份从表中选择数据的查询-
mysql> select Id,UserName,UserLikes from DemoTable where MONTH(UserPostMessageDate)=6;
输出结果
这将产生以下输出-
+----+----------+-----------+| Id | UserName | UserLikes |
+----+----------+-----------+
| 2 | Sam | 790 |
+----+----------+-----------+
1 row in set (0.00 sec)
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