Sql server 日期类型为的sql条件聚合函数

我的桌子像：

    CREATE TABLE myissues 
        (
         id int IDENTITY(1,1) primary key, 
         title varchar(20), 
         status varchar(30),
         submitdate datetime,
         updatedate datetime
        );

    INSERT INTO myissues
    (title, status,submitdate,updatedate)
    VALUES
    ('issue1', 'closed','2014-01-01 07:59:59.000','2014-01-02 10:59:59.000'),
    ('issue2', 'closed','2014-01-01 08:59:59.000','2014-01-02 12:59:59.000'),
    ('issue3', 'closed','2014-01-01 09:59:59.000','2014-01-02 10:59:59.000'),
    ('issue4', 'closed','2014-01-02 07:59:59.000','2014-01-03 10:59:59.000'),
    ('issue5', 'closed','2014-01-02 08:59:59.000','2014-01-03 11:59:59.000'),
    ('issue6', 'closed','2014-01-03 08:59:59.000','2014-01-03 12:59:59.000');

我想得到每天发行的数量，数量应该分为两个不同的类别：提交的开放发行和关闭的开放发行，状态为“关闭”和更新日期。 以下是我的sql脚本：

SELECT 
    convert(nvarchar(10),submitdate,112) as Dates, 
    COUNTS_OPEN   = SUM(case when (submitdate > CONVERT(datetime, '2014-01-01 00:00:00.000') and submitdate < CONVERT(datetime, '2014-01-05 00:00:00.000') ) then 1 else 0 end), 
    COUNTS_CLOSED = SUM(case when (status='closed' and (updatedate > CONVERT(datetime, '2014-01-01 00:00:00.000') and updatedate < CONVERT(datetime, '2014-01-05 00:00:00.000')) ) then 1 else 0 end) 
FROM myissues
GROUP BY convert(nvarchar(10),submitdate,112)
order by convert(nvarchar(10),submitdate,112)

如您所见，计数u CLOSED的结果是错误的。以上所列日期的正确结果应为0,3,3。 我想我没有把它正确地分组。有人能帮忙吗

---

谢谢

您需要将结束计数与主查询分开。试试这个

SELECT convert(nvarchar(10),submitdate,112) as Dates, 
COUNTS_OPEN   = COUNT(1), 
COUNTS_CLOSED = (SELECT COUNT(1) FROM myissues f WHERE f.status = 'closed' AND  convert(nvarchar(10),updatedate,112) = convert(nvarchar(10), m.submitdate,112))
FROM myissues m
GROUP BY convert(nvarchar(10),submitdate,112)
order by convert(nvarchar(10),submitdate,112)

请注意，如果问题在没有提交问题的日期关闭，则此查询将不起作用。要做到这一点，你需要得到一份详尽的日期清单

试试这样的

SELECT m.Dates, 
COUNTS_OPEN = (SELECT COUNT(1) FROM myissues f WHERE convert(nvarchar(10),submitdate,112) = m.Dates),
COUNTS_CLOSED = (SELECT COUNT(1) FROM myissues f WHERE f.status = 'closed' AND  convert(nvarchar(10),updatedate,112) = m.Dates)
FROM (
    SELECT convert(nvarchar(10),submitdate,112) as Dates
    FROM myissues
    UNION
    SELECT convert(nvarchar(10),updatedate,112)
    FROM myissues
) m
order by m.Dates

---

您正在按

submitdate

进行分组。我不明白当只有一个条目的提交日期为20140103时，你怎么会期望计数大于1。谢谢你的回复，这也是我的猜测。应该有另一种方法将其分组。

SELECT m.Dates, 
COUNTS_OPEN = (SELECT COUNT(1) FROM myissues f WHERE convert(nvarchar(10),submitdate,112) = m.Dates),
COUNTS_CLOSED = (SELECT COUNT(1) FROM myissues f WHERE f.status = 'closed' AND  convert(nvarchar(10),updatedate,112) = m.Dates)
FROM (
    SELECT convert(nvarchar(10),submitdate,112) as Dates
    FROM myissues
    UNION
    SELECT convert(nvarchar(10),updatedate,112)
    FROM myissues
) m
order by m.Dates