আমি একটি এসকিউএল সার্ভার ক্যোয়ারী লিখেছি যা ক্ষেত্রের পার্টিশন করার পরে ক্রমসংখ্যক সংখ্যা থাকতে রেকর্ড আপডেট করে। আমি যখন এটি নির্বাচনী বিবৃতি হিসাবে চালিত করি তখন সবকিছু দুর্দান্ত দেখাচ্ছে:
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
যাইহোক, আমি যখন একটি আপডেট আপডেট কমান্ডে ক্যোয়ারী করি তখন এটি এমনকি সংখ্যাকে এড়িয়ে যেতে শুরু করে:
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
আমি বিশেষভাবে এই অংশে দৃষ্টি নিবদ্ধ করার চেষ্টা করেছি:
[Records].[SortField] + RIGHT('0000' + CAST(ROW_NUMBER() OVER(PARTITION BY [Records].[SortField] ORDER BY [Records].[RunDetailID], [Records].[SortField], [Records].[PieceID]) AS VARCHAR), 4) NewSeq9
এর কোন পার্শ্ব প্রতিক্রিয়া কি আমি অজ্ঞ?
টেবিল সংজ্ঞা সাথে আপডেট করুন
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)
);
UPDATE [MRDFStorage]
সঙ্গেUPDATE m
এবংJOIN MRDFStorage ON ...
সঙ্গেJOIN MRDFStorage m ON ...
আমার ভয় আপডেট হয়তো কিছু সারি একাধিকবার আপডেট করছি। এই ব্লগ পোস্টটি পড়ুন: আসুন হালনাগাদ থেকে আপডেট অবচয়!