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私はMySQLデータベースに取り組んでいます。私はテーブルを持っていますempreporting、このテーブルには 列が含まれemployeeidていますreportingemployeeid

SELECT e3.`ReportingEmployeeId` AS Level0,e2.`ReportingEmployeeId` AS Level1,e1.`ReportingEmployeeId` AS Level2,e1.`EmployeeId` AS Level3
FROM empreporting e1
LEFT JOIN empreporting e2 ON e1.`ReportingEmployeeId` = e2.`EmployeeId`
LEFT JOIN empreporting e3 ON e2.`ReportingEmployeeId` = e3.`EmployeeId`

以下の結果を与える上記のクエリ：

レベル0 レベル1 レベル2 レベル3

\N \N 379 369

\N 379 484 372

\N \N \N 379

必要な結果の形式は次のとおりです。

レベル0 レベル1 レベル2 レベル3

379 369 \N \N

379 484 372 \N

379 \N \N \N

誰か助けてください。前もって感謝します

プラカシュ

4

2 に答える 2

2

最後に書かれたクエリ

SELECT 
CASE 
    WHEN e3.`ReportingEmployeeId` IS NOT NULL THEN e3.`ReportingEmployeeId`+1000000 
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NOT NULL THEN e2.`ReportingEmployeeId`
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NULL AND e1.`ReportingEmployeeId` IS NOT NULL THEN e1.`ReportingEmployeeId`
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NULL AND e1.`ReportingEmployeeId` IS NULL AND e1.`EmployeeId`  IS NOT NULL THEN e1.`EmployeeId` 
END AS Level0,
CASE 
    WHEN e3.`ReportingEmployeeId` IS NOT NULL THEN e2.`ReportingEmployeeId`
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NOT NULL THEN e1.`ReportingEmployeeId`
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NULL AND e1.`ReportingEmployeeId` IS NOT NULL THEN e1.`EmployeeId`
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NULL AND e1.`ReportingEmployeeId` IS NULL AND e1.`EmployeeId`  IS NOT NULL THEN NULL
END AS Level1,
CASE 
    WHEN e3.`ReportingEmployeeId` IS NOT NULL THEN e1.`ReportingEmployeeId`
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NOT NULL THEN e1.`EmployeeId` 
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NULL AND e1.`ReportingEmployeeId` IS NOT NULL THEN NULL
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NULL AND e1.`ReportingEmployeeId` IS NULL AND e1.`EmployeeId`  IS NOT NULL THEN NULL
END AS Level2,
CASE
    WHEN e3.`ReportingEmployeeId` IS NOT NULL THEN e1.`EmployeeId` 
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NOT NULL THEN NULL 
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NULL AND e1.`ReportingEmployeeId` IS NOT NULL THEN NULL
    WHEN e3.`ReportingEmployeeId` IS NULL AND e2.`ReportingEmployeeId` IS NULL AND e1.`ReportingEmployeeId` IS NULL AND e1.`EmployeeId`  IS NOT NULL THEN NULL
END AS  Level3
FROM empreporting e1
LEFT JOIN empreporting e2 ON e1.`ReportingEmployeeId` = e2.`EmployeeId` 
LEFT JOIN empreporting e3 ON e2.`ReportingEmployeeId` = e3.`EmployeeId`
于 2013-09-19T11:08:53.993 に答える