Question

我的SQL查询有问题（我知道我在这个任务上非常糟糕:(）

使用SLQ Server 2014，我有一个存储银行工作日的表格，其中包含当天的名称和日期时间。

另一方面，有一个技术人员在一个项目上工作过的桌子。他们可以定期工作甚至是银行工作日。

我得到一个查询，以便生成工资单，让所有技术人员都能获得技术代码，名称，项目ID和日期，但我需要为那些在银行期间没有工作的所有tehcnicians获取另一个列表（UNION）假期因为它们也需要在工资单报告中包括在内（银行工作日也需要支付，但需要区分）。

我尝试使用联接来获取该列表，该列表应该包含技术代码，名称，项目ID和来自 Holidays 的日期，如果他们当天没有工作（该信息在第一天检索到查询因为存储在 Sessions 表中。只有两个表共同的唯一值是日期。

到目前为止，我将向您提出疑问：

-- To get real work hours / days within date range

select 
    distinct s.TechnicianCode, t.Name, s.JobProjectId as jobId, 
    s.SignInDate as [date], 'w'
from 
    JobSession s
inner join 
    Technician t on t.TechnicianCode = s.TechnicianCode
inner join 
    JobAssignedTech jt on jt.TechCode = s.TechnicianCode
left join 
    LeaveDate ld on ld.TechnicianCode = s.TechnicianCode
where  
    (cast(s.SignInDate as date) >= cast(@DateFrom as date) 
    and cast(s.SignInDate as date) <= cast(@DateTo as date)) 
    and jt.IsActive = 1

假期包含：

HolidayID   HolidayDate Name.....   
3   2015-08-19 00:00:00.000 August Bank Holiday ...
5   2015-08-20 00:00:00.000 August Bank Holiday ...

例如，对于像这样的查询

select  
    distinct s.TechnicianCode, t.Name, s.JobProjectId, s.SignInDate  
from 
    JobSession s
inner join 
    Technician t on s.TechnicianCode = t.TechnicianCode 
where 
    cast(s.SignInDate as date) between cast('2015/08/17' as date) and cast('2015/08/24' as date)

我得到了

TechnicianCode  Name                JobProjectId            SignInDate
    282                 Patrick Flood       TEST JOB CHQ E2443      2015-08-17          
    332                 Anthony Farrell     TEST JOB CHQ E2443      2015-08-17
    342                 Ciaran Kimmage      TEST JOB CHQ E2443      2015-08-17
    343                 Anthony Clinton     TEST JOB CHQ E2443      2015-08-17
    440                 Darragh Byrne       TEST JOB CHQ E2443      2015-08-17
    440                 Darragh Byrne       TEST JOB CHQ E2443      2015-08-20
    489                 Thomas Cunningham   TEST JOB CHQ E2443      2015-08-17
    491                 Aidan Lee           TEST JOB CHQ E2443      2015-08-17
    497                 Brian Canavan       TEST JOB CHQ E2443      2015-08-17
    TE                  Test                Sandyford site 07.15    2015-08-17

所以我需要获得一个显示那些技术人员的清单，但是日期应该是银行假日日期，并且只有当他们在那些日子里没有工作时才这样做，例如，代码为440的技术人员不得在列表中两次因为他在8月20日工作，看起来应该是这样的：

TechnicianCode  Name                JobProjectId            SignInDate
        282                 Patrick Flood       TEST JOB CHQ E2443      2015-08-19          
        282                 Patrick Flood       TEST JOB CHQ E2443      2015-08-20          
        332                 Anthony Farrell     TEST JOB CHQ E2443      2015-08-19
        332                 Anthony Farrell     TEST JOB CHQ E2443      2015-08-20
        342                 Ciaran Kimmage      TEST JOB CHQ E2443      2015-08-19
        342                 Ciaran Kimmage      TEST JOB CHQ E2443      2015-08-20
        343                 Anthony Clinton     TEST JOB CHQ E2443      2015-08-19
        343                 Anthony Clinton     TEST JOB CHQ E2443      2015-08-20
        440                 Darragh Byrne       TEST JOB CHQ E2443      2015-08-19        
        489                 Thomas Cunningham   TEST JOB CHQ E2443      2015-08-19
        489                 Thomas Cunningham   TEST JOB CHQ E2443      2015-08-20
        491                 Aidan Lee           TEST JOB CHQ E2443      2015-08-19
        491                 Aidan Lee           TEST JOB CHQ E2443      2015-08-20
        497                 Brian Canavan       TEST JOB CHQ E2443      2015-08-19
        497                 Brian Canavan       TEST JOB CHQ E2443      2015-08-19
        TE                  Test                Sandyford site 07.15    2015-08-19
        TE                  Test                Sandyford site 07.15    2015-08-20

我尝试过UNION，SUB QUERIES，EXIST，IN，INNER等等，我什么都没得到： - /

一点点帮助会非常感激。

Answer 1

您可以在UNION语句中执行此操作，该语句将所有技术人员连接到该范围内的所有假期，但随后使用LEFT JOIN查找从事该假期工作的技术人员，然后将其过滤掉如果他们这样做了

见下文：

select  distinct 
    s.TechnicianCode, 
    t.Name, 
    s.JobProjectId, 
    s.SignInDate  
from 
    JobSession s
inner join 
    Technician t on s.TechnicianCode = t.TechnicianCode 
where 
    cast(s.SignInDate as date) between cast('2015/08/17' as date) and cast('2015/08/24' as date) 

UNION 

SELECT 
    t.TehnicianCode,
    t.Name,
    NULL AS JobProjectID,
    h.HolidayDate 
FROM 
    Technician t 
     INNER JOIN 
    Holidays h ON 
        h.HolidayDate BETWEEN cast('2015/08/17' as date) and cast('2015/08/24' as date) -- connect every technician to every holiday in the range
     LEFT JOIN 
    JobSession s ON -- check for technicians who worked on the holiday
        t.TechnicianCode = s.TechnicianCode AND 
        cast(s.SignInDate as date) = h.HolidayDate
WHERE s.TechnicianCode IS NULL -- filter out the technicans who worked on the holiday

Answer 2

好吧，我终于设法得到了解决方案（对于那些对SQL有所了解但对像我这样的新手来说很棒的人来说并不是那么困难。

为了让只有在银行假期没有工作的技术人员，我必须使用＆＃34; NOT EXISTS＆＃34;在UNION的第二部分：

select distinct(s.TechnicianCode), t.Name, jt.JobProjectId as jobId, cast(h.HolidayDate as date) as date, 'h'---this is to know if tech has worked or was on holidays
        from Holidays h, JobSession s
        inner join Technician t  on s.TechnicianCode = t.TechnicianCode
        inner join JobAssignedTech jt on jt.TechCode = t.TechnicianCode
        where cast(h.HolidayDate as date)  between cast(@DateFrom as date) and cast(@DateTo as date) 
            and cast(s.SignInDate as date)  between cast(@DateFrom as date) and cast(@DateTo as date) 
            and jt.IsActive = 1
            and  not exists (
        Select *--, JobProjectId, SignInDate , h.HolidayDate, h.Name
         from JobSession s1
             where cast(s1.SignInDate as date)  between cast(@DateFrom as date) and cast(@DateTo as date)    
             and s1.TechnicianCode = s.TechnicianCode and cast(s1.SignIndate as date) = cast(h.HolidayDate as date)
         )

如何在内部/联合查询中排除某些行

2 个答案: