MySQL选择日期的行

Question

在MySQL中我有这个查询

SELECT DISTINCT date, descr FROM book ORDER BY date

日期格式为yyyy-mm-dd

我想从2012年1月开始只选择书籍。我曾尝试使用like，但这不起作用。

有任何想法吗？

Answer 1

使用DATE_FORMAT函数

SELECT DISTINCT date, descr FROM book 
WHERE DATE_FORMAT(date, '%Y %m') = DATE_FORMAT('2012-01-01', '%Y %m')
ORDER BY date

或使用MONTH和YEAR函数

SELECT DISTINCT date, descr FROM book 
WHERE Month(date) = Month('2012-01-01')
AND Year(date) = Year('2012-01-01')
ORDER BY date;

或使用BETWEEN函数

SELECT DISTINCT date, descr FROM book 
WHERE date BETWEEN '2012-01-01'
AND '2012-01-31'
ORDER BY date;

或者使用<=和>=运算符

SELECT DISTINCT date, descr FROM book 
WHERE date >= '2012-01-01'
AND date <= '2012-01-31'
ORDER BY date;

See this SQLFiddle

Answer 2

你可以在这里使用>=和<=运算符。检查以下代码：

SELECT *
FROM book
WHERE date >= '2012-01-01' AND date <= '2012-01-31'

Answer 3

试试这个：

SELECT DISTINCT date, descr FROM book WHERE YEAR(date) = '2012' and MONTH(date) = '1'

如果您的“日期”列是MySQL日期字段，则此方法有效。

Answer 4

如果您坚持要使用LIKE语法，则可以先将日期转换为CHAR：

SELECT DISTINCT date，descr FROM book WHERE CAST（date AS char）LIKE'2012-01％'ORDER BY date;

Answer 5

SELECT DISTINCT date, descr
FROM book
WHERE YEAR = DATE(NOW()) AND MONTH(date) = '1'

这将给你今年的书