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  • 表变量和临时表

    SET NOCOUNT ON;

    DECLARE @TestTable TABLE (
    RowID INT IDENTITY PRIMARY KEY CLUSTERED,
    Name VARCHAR(9) NOT NULL UNIQUE,
    Age TINYINT NULL,
    rowguid UNIQUEIDENTIFIER NOT NULL DEFAULT(newid()));

    begin tran

    INSERT INTO @TestTable (Name, Age) VALUES ('Roy', 25),('中国风', 21);
    rollback tran

    SELECT 'Insert rows' as Action, * FROM @TestTable;
    /*
    Action RowID Name Age rowguid
    Insert rows 1 Roy 25 84C4F6CC-3AB3-4D7D-8779-0DCF3414AB61
    Insert rows 2 中国风 21 1DB02A77-F20E-4326-A4E4-023CE9F5DEA7
    */
    go
    if OBJECT_ID('Tempdb..#TestTable') is not null
    drop table #TestTable
    CREATE TABLE #TestTable (
    RowID INT IDENTITY PRIMARY KEY CLUSTERED,
    Name VARCHAR(9) NOT NULL UNIQUE,
    Age TINYINT NULL,
    rowguid UNIQUEIDENTIFIER NOT NULL DEFAULT(newid()));

    begin tran

    INSERT INTO #TestTable (Name,Age) VALUES ('Roy', 25),('中国风', 21);
    rollback tran
    SELECT 'Insert rows' as Action,* FROM #TestTable
    /*
    无记录
    */

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  • 原文地址:https://www.cnblogs.com/q101301/p/4213763.html
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