如何使用mysql构造出本月的日历
时间: 2024-01-22 12:03:59 浏览: 33
您可以使用以下 SQL 语句来构造本月的日历:
```
SELECT
DAYOFMONTH(date) AS day,
DAYNAME(date) AS day_name
FROM
(SELECT
LAST_DAY(NOW() - INTERVAL 1 MONTH) + INTERVAL 1 DAY + INTERVAL n DAY AS date
FROM
(SELECT
a.N + b.N * 10 AS n
FROM
(SELECT 0 AS N UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5
UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9) a
CROSS JOIN
(SELECT 0 AS N UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5
UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9) b
ORDER BY
date) AS dates
WHERE
MONTH(date) = MONTH(NOW())
) AS calendar;
```
这个 SQL 语句使用了一个子查询 `dates`,它生成了本月所有日期的列表。然后,外部查询从这个列表中选择了日期和日期名称来构建日历。
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