Question

我希望从DB2的发布年开始，每周（也是月份）获得数据。

e.g。 select * From tableName where week=10 or week=40;

请帮助在DB2中编写SQL。

Answer 1

您可以使用WEEK_ISO()函数返回整数值1-53

select * From tableName where WEEK_ISO(yearValue)=10 or WEEK_ISO(yearValue)=40;

Documentation here

Answer 2

我已经使用了以下SQL来明智地获取数据。谢谢你的朋友的支持。

- 每周计算数据 -

SELECT  WEEK_ISO(login_datetime) AS Week, YEAR(login_datetime) AS Year
FROM TableName 
WHERE login_datetime BETWEEN  '2012-01-01' AND '2013-12-31' 
GROUP BY WEEK_ISO(login_datetime), YEAR(login_date) 
ORDER BY YEAR(login_datetime), WEEK_ISO(login_datetime)

- 按月计算数据 -

SELECT MONTH(login_datetime) AS Month, YEAR(login_datetime) AS Year
FROM TableName 
WHERE login_datetime BETWEEN '2012-01-01' AND '2013-12-31' 
GROUP BY MONTH(login_datetime), YEAR(login_datetime) 
ORDER BY YEAR(login_datetime), MONTH(login_datetime)

从给予者年份获得数据周（也是月份）

2 个答案: