태그 보관물: subquery

subquery

SQL Server 쿼리가 UPDATE에서 SELECT와 다르게 동작하는 이유는 무엇입니까?

필드에서 파티션을 나눈 후 레코드가 순차적 번호를 갖도록 업데이트하는 SQL Server 쿼리를 작성했습니다. SELECT 문으로 실행하면 모든 것이 멋지게 보입니다.

DECLARE @RunDetailID INT = 448
DECLARE @JobDetailID INT

SELECT @JobDetailID = [JobDetailID] FROM [RunDetails] WHERE [RunDetailID] = @RunDetailID

SELECT
    [OrderedRecords].[NewSeq9],
    RIGHT([OrderedRecords].[NewSeq9], 4)
FROM
    (
        SELECT
            [Records].*,
            [Records].[SortField] + RIGHT('0000' + CAST(ROW_NUMBER() OVER(PARTITION BY [Records].[SortField] ORDER BY [Records].[RunDetailID], [Records].[SortField], [Records].[PieceID]) AS VARCHAR), 4) NewSeq9
        FROM
        (
            SELECT
                [MRDFStorageID],
                [RunDetailID],
                [SortField],
                [PieceID],
                [Seq9],
                [BallotType]
            FROM
                [MRDFStorage]
                    JOIN [BallotStyles] ON [MRDFStorage].[SortField] = [BallotStyles].[Style] and [BallotStyles].[JobDetailID] = @JobDetailID
            WHERE
                [RunDetailID] IN (SELECT [RunDetailID] FROM [RunDetails] WHERE [JobDetailID] = @JobDetailID AND [RunStatusID] <> 0)
        ) Records
    ) OrderedRecords
        JOIN MRDFStorage ON [OrderedRecords].[MRDFStorageID] = [MRDFStorage].[MRDFStorageID]
WHERE
    [MRDFStorage].[RunDetailID] = @RunDetailID

여기에 이미지 설명을 입력하십시오

그러나 쿼리를 UPDATE 명령으로 만들면 짝수를 건너 뛰기 시작합니다.

DECLARE @RunDetailID INT = 448
DECLARE @JobDetailID INT

SELECT @JobDetailID = [JobDetailID] FROM [RunDetails] WHERE [RunDetailID] = @RunDetailID

UPDATE
    [MRDFStorage]
SET
    [Seq9] = [OrderedRecords].[NewSeq9],
    [Overlay1] = [OrderedRecords].[NewSeq9],
    [Overlay10] = RIGHT([OrderedRecords].[NewSeq9], 4)
FROM
    (
        SELECT
            [Records].*,
            [Records].[SortField] + RIGHT('0000' + CAST(ROW_NUMBER() OVER(PARTITION BY [Records].[SortField] ORDER BY [Records].[RunDetailID], [Records].[SortField], [Records].[PieceID]) AS VARCHAR), 4) NewSeq9
        FROM
        (
            SELECT
                [MRDFStorageID],
                [RunDetailID],
                [SortField],
                [PieceID],
                [Seq9],
                [BallotType],
                CAST([SpecialProcessing] as Int) StartCount
            FROM
                [MRDFStorage]
                    JOIN [BallotStyles] ON [MRDFStorage].[SortField] = [BallotStyles].[Style] and [BallotStyles].[JobDetailID] = @JobDetailID
            WHERE
                [RunDetailID] IN (SELECT [RunDetailID] FROM [RunDetails] WHERE [JobDetailID] = @JobDetailID AND [RunStatusID] <> 0)
        ) Records
    ) OrderedRecords
        JOIN MRDFStorage ON [OrderedRecords].[MRDFStorageID] = [MRDFStorage].[MRDFStorageID]
WHERE
    [MRDFStorage].[RunDetailID] = @RunDetailID

나는이 부분에 특별히 초점을 맞추려고 노력했다.

[Records].[SortField] + RIGHT('0000' + CAST(ROW_NUMBER() OVER(PARTITION BY [Records].[SortField] ORDER BY [Records].[RunDetailID], [Records].[SortField], [Records].[PieceID]) AS VARCHAR), 4) NewSeq9

내가 모르는 부작용이 있습니까?

테이블 정의로 업데이트

CREATE TABLE [dbo].[MRDFStorage] (
    [MRDFStorageID]           INT            IDENTITY (1, 1) NOT NULL,
    [RunDetailID]             INT            NOT NULL,
    [PieceID]                 VARCHAR (15)   NULL,
    [SortField]               VARCHAR (20)   NULL,
    [BallotType]              VARCHAR (100)  NULL,
    [Seq9]                    VARCHAR (15)   NULL,
    CONSTRAINT [PK_MRDFStorage] PRIMARY KEY CLUSTERED ([MRDFStorageID] ASC),
    CONSTRAINT [FK_MRDFStorage_RunDetails] FOREIGN KEY ([RunDetailID]) REFERENCES [dbo].[RunDetails] ([RunDetailID])
);

CREATE TABLE [dbo].[BallotStyles] (
    [BallotStyleID]     INT           IDENTITY (1, 1) NOT NULL,
    [JobDetailID]       INT           NOT NULL,
    [Style]             VARCHAR (20)  NOT NULL,
    CONSTRAINT [PK_BallotStyles] PRIMARY KEY CLUSTERED ([BallotStyleID] ASC)
);

CREATE TABLE [dbo].[RunDetails] (
    [RunDetailID]        INT            IDENTITY (1, 1) NOT NULL,
    [JobDetailID]        INT            NOT NULL,
    CONSTRAINT [PK_RunDetails] PRIMARY KEY CLUSTERED ([RunDetailID] ASC)
);

답변

당신이 가지고있는 데이터를 보지 않으면 이것을 조금 더 어렵게하지만, 당신이 이것으로 볼 때 당신이 보는 것을 재현 할 수있었습니다.

insert into RunDetails(RunDetailID, JobDetailID) values(448, 1)
insert into MRDFStorage(RunDetailID, SortField) values(448, 'S1')
insert into MRDFStorage(RunDetailID, SortField) values(448, 'S1')
insert into MRDFStorage(RunDetailID, SortField) values(448, 'S1')
insert into BallotStyles(JobDetailID, Style) values(1, 'S1')
insert into BallotStyles(JobDetailID, Style) values(1, 'S1')

여기서 중요한 요소는의 두 행입니다 BallotStyles.

BallotStyles가장 내부 쿼리에서 조인하고 있으며 위와 같은 데이터를 사용하면의 각 행에 대해 중복 된 행이 표시됩니다 MRDFStorage. 열을 사용하지 않기 때문에 BallotStyles행의 존재 여부 만 확인하고 exists대신 절로 수행 할 수 있으며 물론 중복 행을 만들지 않습니다.

UPDATE
    [MRDFStorage]
SET
    [Seq9] = [OrderedRecords].[NewSeq9]
FROM
    (
        SELECT
            MRDFStorageID,
            [Records].[SortField] + RIGHT('0000' + CAST(ROW_NUMBER() OVER(PARTITION BY [Records].[SortField] ORDER BY [Records].[RunDetailID], [Records].[SortField], [Records].[PieceID]) AS VARCHAR), 4) NewSeq9
        FROM
        (
            SELECT
                M.[MRDFStorageID],
                M.[RunDetailID],
                M.[SortField],
                M.[PieceID],
                M.[BallotType]
            FROM
                [MRDFStorage] as M
-- Remove this join
--                    JOIN [BallotStyles] ON M.[SortField] = [BallotStyles].[Style] and [BallotStyles].[JobDetailID] = @JobDetailID
            WHERE
                [RunDetailID] IN (SELECT [RunDetailID] FROM [RunDetails] WHERE [JobDetailID] = @JobDetailID) and
-- Add this exists check instead of the join
                EXISTS (
                       SELECT *
                       FROM BallotStyles AS BS
                       WHERE M.SortField = BS.Style and
                             BS.JobDetailID = @JobDetailID
                       )
        ) Records
    ) OrderedRecords
        JOIN MRDFStorage ON [OrderedRecords].[MRDFStorageID] = [MRDFStorage].[MRDFStorageID]
WHERE
    [MRDFStorage].[RunDetailID] = @RunDetailID

답변