mysql中,在audit_logging表中,使用sql如何通过create_time字段同时查出本年至7年前每年分别有多少条数据与本年每月分别有多少条数据和本月每天有多少条数据,没有数据的使用0代替
时间: 2024-09-25 09:16:01 浏览: 36
ORACLE_审计内容_DBA_AUDIT_TRAIL.xlsx
在MySQL中,要查询`audit_logging`表中关于创建时间 (`create_time`) 的统计信息,包括本年至7年前每年的数据量、本年每个月的数据量以及本月每天的数据量,并使用0填充缺失值,可以使用`GROUP BY`、`DATE_FORMAT`函数以及`IFNULL()`或`COALESCE()`等。这里是一个示例SQL语句:
```sql
SELECT
YEAR(create_time) AS year,
MONTH(create_time) AS month,
DAY(create_time) AS day,
COUNT(*) AS data_count
FROM
audit_logging
WHERE
create_time >= CURDATE() - INTERVAL 1 YEAR AND -- 本年
create_time <= CURDATE() - INTERVAL 7 YEAR -- 本年至7年前
GROUP BY
YEAR(create_time),
MONTH(create_time),
DAY(create_time)
ORDER BY
create_time;
UNION ALL
SELECT
YEAR(CURDATE()) AS year,
MONTH(CURDATE()) AS month,
DATE_FORMAT(CURDATE(), '%d') AS day,
IFNULL(SUM(data_count), 0) AS data_count
FROM (
SELECT
YEAR(create_time) AS year,
MONTH(create_time) AS month,
DAY(create_time) AS day,
COUNT(*) AS data_count
FROM
audit_logging
WHERE
create_time BETWEEN CURDATE() - INTERVAL 1 MONTH AND CURDATE()
GROUP BY
YEAR(create_time),
MONTH(create_time),
DAY(create_time)
) subquery
GROUP BY
year, month, DAY(CURDATE())
ORDER BY
create_time;
```
请注意,这个查询假设`create_time`是日期类型,并且数据库支持`INTERVAL`语法。如果`data_count`为0,那么`IFNULL(SUM(data_count), 0)`会返回0。
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