mysql中获取当月的每天的数据数量的sql怎么写
时间: 2023-08-14 12:05:08 浏览: 105
可以使用以下SQL语句来获取当月的每天的数据数量:
```
SELECT DATE(date_column) AS date, COUNT(*) AS count
FROM table
WHERE MONTH(date_column) = MONTH(CURRENT_DATE())
GROUP BY date;
```
其中,`date_column`是包含日期的列名,`table`是表名。这条SQL语句会把每一天的数量分别统计出来,并按照日期进行排序。
相关问题
mysql中获取当月的每天的数据数量的sql怎么写,没有数据的日期数量补0,格式采用月、日
可以使用以下SQL语句来获取当月的每天的数据数量,并且对于没有数据的日期补0:
```
SELECT DATE_FORMAT(date_column, '%m-%d') AS date, COUNT(*) AS count
FROM (
SELECT DATE_ADD(LAST_DAY(CURRENT_DATE()), INTERVAL 1 DAY) - INTERVAL n DAY AS date
FROM (
SELECT a.N + b.N * 10 + 1 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, (
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 n DESC
) x
WHERE DATE_ADD(LAST_DAY(CURRENT_DATE()), INTERVAL 1 DAY) - INTERVAL n DAY >= DATE_FORMAT(CURRENT_DATE(), '%Y-%m-01')
) d
LEFT JOIN table ON DATE(date_column) = d.date
GROUP BY d.date
ORDER BY d.date;
```
其中,`date_column`是包含日期的列名,`table`是表名。这条SQL语句会把当月的每一天的数量分别统计出来,并将没有数据的日期补0。结果的日期格式采用月、日的形式(例如:01-01)。
mysql中统计当月每天的数据数量,没有数据,那天的数量赋值为0
可以使用以下SQL语句来获取当月每天的数据数量,并将没有数据的日期数量赋值为0:
```
SELECT DATE(date_column) AS date, COUNT(*) AS count
FROM (
SELECT DATE_FORMAT(CURRENT_DATE(), '%Y-%m-%d') - INTERVAL (a.a + (10 * b.a) + (100 * c.a)) DAY AS date
FROM (
SELECT 0 AS a UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9
) AS a
CROSS JOIN (
SELECT 0 AS a UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9
) AS b
CROSS JOIN (
SELECT 0 AS a UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9
) AS c
) AS dates
LEFT JOIN table ON DATE(date_column) = dates.date
WHERE MONTH(dates.date) = MONTH(CURRENT_DATE())
GROUP BY dates.date
ORDER BY dates.date;
```
其中,`date_column`是包含日期的列名,`table`是表名。这条SQL语句会把当月的每一天的数量分别统计出来,并将没有数据的日期数量赋值为0。
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