Question

您好我的公司前雇员所做的选择陈述非常复杂它的作用是返回申请人申请的所有工作清单。查询工作正常，但我只需要应用唯一的作业。我在使用DISTINCT或GROUP BY时遇到问题。重复发生是因为与工作和申请人相关的表有重复，我无法做任何事情。所以有人能帮我解决这个问题吗？ PS：请不要责怪Query结构不是我的。谢谢！

         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

Answer 1

您可以在现有查询中添加DISTINCT，但我怀疑有几列选择始终是唯一的（例如，CreatedOn，ModifiedOn）。所以，它不太可能有所帮助。

您必须创建一个只返回当前列的子集的查询。从最低限度开始，验证它是否为您提供了正确的作业列表。然后开始添加其他列 - 如果它停止返回不同的作业，那么您将无法在此查询中使用该列。

SELECT DISTINCT
    J.JobsID,
    J.JobsHeader 
FROM dbo.EmployeeToJobsApplied ETJA 
    INNER JOIN dbo.Jobs J ON J.JobsID = ETJA.JobsId
WHERE ETJA.Applied = 1 AND ETJA.EmployeeId=1

SQL Server GROUPING和DISTINCT

1 个答案: