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我相信可以優化這個sql-server查詢。我試圖使用一個外部連接沒有結果。任何人都可以幫助我優化這個查詢嗎?OPTIMIZE UNION SQL QUERY
SELECT '1' AS CodigoEmpresa,
T0.CodigoAlmacen,
'' AS CodigoUbicacion,
T0.CodigoArticulo,
T0.Partida,
CAST(T0.Unidades - ISNULL(T1.Unidades, 0) AS float) AS Unidades,
T0.FechaCaduca
FROM dbo.ERP_Stock_Entrada_FINAL AS T0
LEFT JOIN dbo.ERP_Stock_Salida_FINAL AS T1 ON T0.CodigoArticulo = T1.CodigoArticulo
AND T0.Partida = T1.Partida
AND T0.CodigoAlmacen = T1.CodigoAlmacen
UNION
SELECT '1' AS CodigoEmpresa,
T0.CodigoAlmacen,
'' AS CodigoUbicacion,
T0.CodigoArticulo,
T0.Partida,
CAST(ISNULL(T1.Unidades,0)-T0.Unidades AS FLOAT) AS Unidades,
T0.Fechacaduca
FROM ERP_Stock_Salida_Final AS T0
LEFT JOIN dbo.ERP_Stock_Entrada_FINAL AS T1 ON T0.CodigoArticulo = T1.CodigoArticulo
AND T0.Partida = T1.Partida
AND T0.CodigoAlmacen = T1.CodigoAlmacen
請必須在格式化這個問題是可讀的一個bash –
你實際上意味着'union'而不是'工會all' ? – GSerg
請用你正在使用的數據庫標記你的問題。 –