小编Xav*_*nou的帖子

我有一些性能问题.

我有一张大约200万行的表.

CREATE TABLE [dbo].[M8](
    [M8_ID] [int] IDENTITY(1,1) NOT NULL,
    [APPLIC] [char](8) NOT NULL,
    [NIVALERTE] [numeric](1, 0) NOT NULL,
    [LOGDH] [datetime2](7) NULL,
    [USERX] [char](20) NOT NULL,
    [TACHE] [char](3) NOT NULL,
    [PRG] [char](32) NOT NULL,
    [DOS] [numeric](3, 0) NOT NULL,
    [ERRNUM] [numeric](5, 0) NOT NULL,
    [LOGTXT] [char](200) NOT NULL)

我用C#和ADO.NET阅读它们

在管理工作室(SQL Server 2008 R2)中,使用该查询:

SELECT 
    M8.M8_ID, M8.APPLIC, M8.NIVALERTE, M8.LOGDH, M8.USERX, M8.TACHE, 
    M8.PRG, M8.DOS, M8.ERRNUM, M8.LOGTXT
FROM 
    M8 AS M8 WITH(NOLOCK) 
WHERE 
    ((M8.APPLIC LIKE 'DAV' ) )
ORDER BY 
    M8.LOGDH DESC, M8.M8_ID …