SQL UNION。结果出现在错误的列中

时间：2018-12-17 13:09:47

标签： sql sql-server union

我有这么长的SQL UNION查询。因此，我有两个表具有相同的列名，但可能具有不同的数据。我正在编写此查询来检查两个表上的列是否存在差异并显示差异。我的问题是，差异又回到了错误的栏目之下。所有结果都返回到第一个SELECT语句中各列的标题下。我希望不同的列返回正确的列名，以使区别清楚。这是我的代码和输出结果的图片。我在SELECT语句返回差异的旁边加上了注释。

SELECT DISTINCT --All Differences are coming under these headings
s.EEid,
CAST(s.Gross AS FLOAT) AS 'Star Gross',
CAST(pr.Gross AS FLOAT) AS 'PR Gross',
CAST(s.Gross AS FLOAT) - CAST(pr.Gross AS FLOAT) AS 'Gross Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Gross AS FLOAT) != CAST(pr.Gross AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.NetPay AS FLOAT) AS 'Star NetPay',
CAST(pr.NetPay AS FLOAT) AS 'PR NetPay',
CAST(s.NetPay AS FLOAT) - CAST(pr.NetPay AS FLOAT) AS 'NetPay Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.NetPay AS FLOAT) != CAST(pr.NetPay AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.StudentLoanDeductions AS FLOAT) AS 'Star StudentLoanDeductions',
CAST(pr.StudentLoanDeductions AS FLOAT) AS 'PR StudentLoanDeductions',
CAST(s.StudentLoanDeductions AS FLOAT) - CAST(pr.StudentLoanDeductions AS FLOAT) AS 'StudentLoanDeductions Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.StudentLoanDeductions AS FLOAT) != CAST(pr.StudentLoanDeductions AS FLOAT) AND s.PayCode = pr.PayCode

UNION 

SELECT DISTINCT --Different
s.EEid,
CAST(s.Total AS FLOAT) AS 'Star Total',
CAST(pr.Total AS FLOAT) AS 'PR Total',
CAST(s.Total AS FLOAT) - CAST(pr.Total AS FLOAT) AS 'Total Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Total AS FLOAT) != CAST(pr.Total AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT --Different
s.EEid,
CAST(s.Earnings_To_LEL AS FLOAT) AS 'Star EarningsToLEL',
CAST(pr.Earnings_To_LEL AS FLOAT) AS 'PR EarningsToLEL',
CAST(s.Earnings_To_LEL AS FLOAT) - CAST(pr.Earnings_To_LEL AS FLOAT) AS 'EarningsToLEL Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Earnings_To_LEL AS FLOAT) != CAST(pr.Earnings_To_LEL AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.Earnings_To_SET AS FLOAT) AS 'Star EarningsToSET',
CAST(pr.Earnings_To_SET AS FLOAT) AS 'PR EarningsToSET',
CAST(s.Earnings_To_SET AS FLOAT) - CAST(pr.Earnings_To_SET AS FLOAT) AS 'EarningsToSET Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Earnings_To_SET AS FLOAT) != CAST(pr.Earnings_To_SET AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT --Different
s.EEid,
CAST(s.Earnings_To_PET AS FLOAT) AS 'Star EarningsToPET',
CAST(pr.Earnings_To_PET AS FLOAT) AS 'PR EarningsToPET',
CAST(s.Earnings_To_PET AS FLOAT) - CAST(pr.Earnings_To_PET AS FLOAT) AS 'EarningsToPET Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Earnings_To_PET AS FLOAT) != CAST(pr.Earnings_To_PET AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT --Different
s.EEid,
CAST(s.Earnings_To_UST AS FLOAT) AS 'Star EarningsToUST',
CAST(pr.Earnings_To_UST AS FLOAT) AS 'PR EarningsToUST',
CAST(s.Earnings_To_UST AS FLOAT) - CAST(pr.Earnings_To_UST AS FLOAT) AS 'EarningsToUST Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Earnings_To_UST AS FLOAT) != CAST(pr.Earnings_To_UST AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.Earnings_To_AUST AS FLOAT) AS 'Star EarningsToAUST',
CAST(pr.Earnings_To_AUST AS FLOAT) AS 'PR EarningsToAUST',
CAST(s.Earnings_To_AUST AS FLOAT) - CAST(pr.Earnings_To_AUST AS FLOAT) AS 'EarningsToAUST Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Earnings_To_AUST AS FLOAT) != CAST(pr.Earnings_To_AUST AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.Earnings_To_UEL AS FLOAT) AS 'Star EarningsToUEL',
CAST(pr.Earnings_To_UEL AS FLOAT) AS 'PR EarningsToUEL',
CAST(s.Earnings_To_UEL AS FLOAT) - CAST(pr.Earnings_To_UEL AS FLOAT) AS 'EarningsToUEL Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Earnings_To_UEL AS FLOAT) != CAST(pr.Earnings_To_UEL AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.Earnings_Above_UEL AS FLOAT) AS 'Star EarningsAboveUEL',
CAST(pr.Earnings_Above_UEL AS FLOAT) AS 'PR EarningsAboveUEL',
CAST(s.Earnings_Above_UEL AS FLOAT) - CAST(pr.Earnings_Above_UEL AS FLOAT) AS 'EarningsAboveUEL Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Earnings_Above_UEL AS FLOAT) != CAST(pr.Earnings_Above_UEL AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT --Different
s.EEid,
CAST(s.Ee_Contributions_Pt1 AS FLOAT) AS 'Star EeContributionsPT1',
CAST(pr.Ee_Contributions_Pt1 AS FLOAT) AS 'PR EeContributionsPT1',
CAST(s.Ee_Contributions_Pt1 AS FLOAT) - CAST(pr.Ee_Contributions_Pt1 AS FLOAT) AS 'EeContributionsPT1 Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Ee_Contributions_Pt1 AS FLOAT) != CAST(pr.Ee_Contributions_Pt1 AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.Ee_Contributions_Pt2 AS FLOAT) AS 'Star EeContributionsPT2',
CAST(pr.Ee_Contributions_Pt2 AS FLOAT) AS 'PR EeContributionsPT2',
CAST(s.Ee_Contributions_Pt2 AS FLOAT) - CAST(pr.Ee_Contributions_Pt2 AS FLOAT) AS 'EeContributionsPT2 Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Ee_Contributions_Pt2 AS FLOAT) != CAST(pr.Ee_Contributions_Pt2 AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT --Different
s.EEid,
CAST(s.Er_Contributions AS FLOAT) AS 'Star ErContributions',
CAST(pr.Er_Contributions AS FLOAT) AS 'PR ErContributions',
CAST(s.Er_Contributions AS FLOAT) - CAST(pr.Er_Contributions AS FLOAT) AS 'ErContributions Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Er_Contributions AS FLOAT) != CAST(pr.Er_Contributions AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.Ee_Rebate AS FLOAT) AS 'Star EeRebate',
CAST(pr.Ee_Rebate AS FLOAT) AS 'PR EeRebate',
CAST(s.Ee_Rebate AS FLOAT) - CAST(pr.Ee_Rebate AS FLOAT) AS 'EeRebate Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Ee_Rebate AS FLOAT) != CAST(pr.Ee_Rebate AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.Er_Rebate AS FLOAT) AS 'Star ErRebate',
CAST(pr.Er_Rebate AS FLOAT) AS 'PR ErRebate',
CAST(s.Er_Rebate AS FLOAT) - CAST(pr.Er_Rebate AS FLOAT) AS 'ErRebate Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Er_Rebate AS FLOAT) != CAST(pr.Er_Rebate AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.Ee_Reduction AS FLOAT) AS 'Star EeReduction',
CAST(pr.Ee_Reduction AS FLOAT) AS 'PR EeReduction',
CAST(s.Ee_Reduction AS FLOAT) - CAST(pr.Ee_Reduction AS FLOAT) AS 'EeReduction Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.Ee_Reduction AS FLOAT) != CAST(pr.Ee_Reduction AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.TaxPreviousEmt AS FLOAT) AS 'Star TaxPreviousEmt',
CAST(pr.TaxPreviousEmt AS FLOAT) AS 'PR TaxPreviousEmt',
CAST(s.TaxPreviousEmt AS FLOAT) - CAST(pr.TaxPreviousEmt AS FLOAT) AS 'TaxPreviousEmt Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.TaxPreviousEmt AS FLOAT) != CAST(pr.TaxPreviousEmt AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.TaxablePayPreviousEmt AS FLOAT) AS 'Star TaxablePayPreviousEmt',
CAST(pr.TaxablePayPreviousEmt AS FLOAT) AS 'PR TaxablePayPreviousEmt',
CAST(s.TaxablePayPreviousEmt AS FLOAT) - CAST(pr.TaxablePayPreviousEmt AS FLOAT) AS 'TaxablePayPreviousEmt Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.TaxablePayPreviousEmt AS FLOAT) != CAST(pr.TaxablePayPreviousEmt AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.TaxThisEmt AS FLOAT) AS 'Star TaxThisEmt',
CAST(pr.TaxThisEmt AS FLOAT) AS 'PR TaxThisEmt',
CAST(s.TaxThisEmt AS FLOAT) - CAST(pr.TaxThisEmt AS FLOAT) AS 'TaxThisEmt Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.TaxThisEmt AS FLOAT) != CAST(pr.TaxThisEmt AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.TaxablePayThisEmt AS FLOAT) AS 'Star TaxablePayThisEmt',
CAST(pr.TaxablePayThisEmt AS FLOAT) AS 'PR TaxablePayThisEmt',
CAST(s.TaxablePayThisEmt AS FLOAT) - CAST(pr.TaxablePayThisEmt AS FLOAT) AS 'TaxablePayThisEmt Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.TaxablePayThisEmt AS FLOAT) != CAST(pr.TaxablePayThisEmt AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.AccYearBal AS FLOAT) AS 'Star AccYearBal',
CAST(pr.AccYearBal AS FLOAT) AS 'PR AccYearBal',
CAST(s.AccYearBal AS FLOAT) - CAST(pr.AccYearBal AS FLOAT) AS 'AccYearBal Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.AccYearBal AS FLOAT) != CAST(pr.AccYearBal AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.PAYEYearBal AS FLOAT) AS 'Star PAYEYearBal',
CAST(pr.PAYEYearBal AS FLOAT) AS 'PR PAYEYearBal',
CAST(s.PAYEYearBal AS FLOAT) - CAST(pr.PAYEYearBal AS FLOAT) AS 'PAYEYearBal Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.PAYEYearBal AS FLOAT) != CAST(pr.PAYEYearBal AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.ACCYearUnits AS FLOAT) AS 'Star ACCYearUnits',
CAST(pr.ACCYearUnits AS FLOAT) AS 'PR ACCYearUnits',
CAST(s.ACCYearUnits AS FLOAT) - CAST(pr.ACCYearUnits AS FLOAT) AS 'ACCYearUnits Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.ACCYearUnits AS FLOAT) != CAST(pr.ACCYearUnits AS FLOAT) AND s.PayCode = pr.PayCode

UNION

SELECT DISTINCT
s.EEid,
CAST(s.PAYEYearUnits AS FLOAT) AS 'Star PAYEYearUnits',
CAST(pr.PAYEYearUnits AS FLOAT) AS 'PR PAYEYearUnits',
CAST(s.PAYEYearUnits AS FLOAT) - CAST(pr.PAYEYearUnits AS FLOAT) AS 'PAYEYearUnits Difference'
FROM starPayHistory s
INNER JOIN payRunPayHistory pr ON pr.EEid = s.EEid
WHERE CAST(s.PAYEYearUnits AS FLOAT) != CAST(pr.PAYEYearUnits AS FLOAT) AND s.PayCode = pr.PayCode

这是结果的图片。如您所见，结果全都位于错误的标题名称下。Any recommendations are greatly appreciated

SO here is an example of expected result. The columns with the two different values and then the difference.

2 个答案:

答案 0 :(得分：0)

我不明白你的意思，但这是基于Oracle RDBMS的一些建议：

  • 使用UNION集运算符时，您不必在SELECT指令中使用DISTINCT-UNION自动删除所有重复项，
  • 最后一列的别名来自firs SELECT指令-省略了第二个及其他SELECT的名称，
  • 列必须具有相似的数据类型，但不能具有相同的数据类型-允许隐式转换（例如'2'可以自动从字符串转换为数字），
  • 如果要在查询结果之间产生eny差异，请检查MINUS set运算符。

答案 1 :(得分：0)

一个关系（表）由一个标题和一组元组组成。在示例查询中，您将所有CAST列都放在同一标题下。如果您希望它们在不同的列中，则可以添加虚拟列，并在最外层使用聚合来删除虚拟变量：

  SELECT DISTINCT
    EEid，
    CAST（s.Gross AS FLOAT）作为“ Star Gross”，
    CAST（现价浮动净值）作为“ PR毛重”，
    CAST（s.Gross AS FLOAT）-CAST（pr.Gross AS FLOAT）AS'Gross Difference'，
    CAST（空值表示为FLOAT）作为“ Star NetPay”，
    CAST（不包含FLOAT）作为“ PR NetPay”，
    CAST（空值表示为FLOAT）作为“ NetPay差异”
来自starPayHistory的
加入payRunPayHistory公关
  开启pr.EEid = s.EEid
放送（s.Gross AS FLOAT）！=放送（s.Gross AS FLOAT）-这看起来很危险
  AND s.PayCode = pr.PayCode

联盟

选择地区
    EEid
    CAST（空值表示为FLOAT）AS ...，
    CAST（空值表示为FLOAT）AS ...，
    CAST（空值表示为FLOAT）AS ...，
    CAST（s.NetPay AS FLOAT）作为“ Star NetPay”，
    CAST（pr.NetPay AS FLOAT）作为“ PR NetPay”，
    CAST（s.NetPay AS FLOAT）-CAST（pr.NetPay AS FLOAT）AS'NetPay差异'
来自starPayHistory的
加入payRunPayHistory公关
    开启pr.EEid = s.EEid
CAST（s.NetPay AS FLOAT）！= CAST（pr.NetPay AS FLOAT）
  AND s.PayCode = pr.PayCode

一些评论：

  • 如果您使用UNION，则DISTINCT是多余的
  • 比较浮标可能会给您带来麻烦
  • <>是标准运算符，尽管！=在大多数DBMS中均可使用

但是，看起来好像您正在使用相同的表进行连接，因此我认为您可以像这样简化查询：

  SELECT DISTINCT
    EEid，
    CAST（s.Gross AS FLOAT）作为“ Star Gross”，
    CAST（现价浮动净值）作为“ PR毛重”，
    CAST（s.Gross AS FLOAT）-CAST（pr.Gross AS FLOAT）AS'Gross Difference'，
    CAST（s.NetPay AS FLOAT）作为“ Star NetPay”，
    CAST（pr.NetPay AS FLOAT）作为“ PR NetPay”，
    CAST（s.NetPay AS FLOAT）-CAST（pr.NetPay AS FLOAT）AS'NetPay差异'
来自starPayHistory的
加入payRunPayHistory公关
  开启pr.EEid = s.EEid
在哪里（s.Gross <> pr.Gross或s.NetPay <> pr.NetPay）
  AND s.PayCode = pr.PayCode

我不清楚在值相等的情况下您想做什么，因此我将继续进行介绍。当然，您必须扩展查询以包括其他列。

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