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嗨,我有一个前雇员在我们公司做的非常复杂的select语句 它做的是返回申请人申请的所有工作列表。 查询工作正常,但我只需要获取唯一的工作应用。我在使用DISTINCT或GROUP BY时遇到问题。 重复的发生是因为与作业和申请人相关的表格有重复的地方,我无法做任何事情。所以任何人都可以帮我解决这个问题吗? PS:请不要责怪它的查询结构不是我的。谢谢!SQL Server GROUPING和DISTINCT
SELECT
J.JobsID,
J.JobsHeader,
I.IndustryName,
J.JobDescription,
J.JobBreif,
J.JobRequirement,
J.JobLocation,
(SELECT CASE WHEN J.HideSalary = 1 THEN 'hidden' ELSE J.Salary END) AS 'Salary',
J.HideSalary,
(SELECT CASE WHEN J.HideCompanyName = 1 THEN 'hidden' ELSE COMP.CompanyName END) AS 'CompanyName',
J.HideCompanyName,
J.CurrentStatus,
J.ExperienceInMonth,
J.ExperienceInYear,
Q.QualificationName,
J.HourID,
J.Age,
J.Gender,
L.CityName,
J.UAENationals,
J.SeniorExecutive,
J.StartDate,
J.EndDate,
S.SpecizationName,
CIRT.SpecizationName AS 'CirtificationName',
J.AvailType,
J.CreatedOn,
J.CreatedBy,
J.ModifiedOn,
J.ModifiedBy,
N.CountryName,
--ETJA.CreatedOn AS 'AppliedOn',
'12/01/2012' AS 'AppliedOn',
ETJA.JobsId AS 'AppliedJobId'
FROM dbo.EmployeeToJobsApplied ETJA
INNER JOIN dbo.Jobs J ON J.JobsID = ETJA.JobsId
INNER JOIN dbo.Employers COMP ON J.CompanyID = COMP.EmployerId
LEFT JOIN dbo.Experience E ON J.ExperienceInYear = E.ExperienceID
LEFT JOIN dbo.Industry I ON J.JobIndustryId = I.IndustryID
LEFT JOIN dbo.Location L ON J.LocationID = L.CityId
LEFT JOIN dbo.Qualification Q ON J.QualificationID = Q.QualificationID
LEFT JOIN dbo.Nation N ON J.CountryID = N.CountryID
LEFT JOIN dbo.Specization S ON J.SpecilizationId = S.SpecizationID
LEFT JOIN dbo.Specization CIRT ON J.CirtificationId = CIRT.SpecizationID
WHERE ETJA.Applied = 1 AND ETJA.EmployeeId=1
那么你不需要使用GROUPING,因为你没有使用任何聚合函数(sum,count等)。因此,如果您包含DISTINCT关键字,哪些列会返回不同的值,以致您获得重复的作业?你真的需要所有这些表和所有这些值返回? – kaj 2012-02-21 09:44:42