Question

以下代码在SQL中出现错误

关键字＆＃39;选择＆＃39;附近的语法不正确。

这是我的合并代码，其中InstalledSoftwareList是一个已使用的已定义表。

 MERGE [dbo].[TableName] AS TargetTable      
        USING UDTableName AS SourceTable                    
        ON (TargetTable.[EId] = SourceTable.[EId]
        AND TargetTable.[MId] = SourceTable.[MId]
        AND TargetTable.PackageId = (SELECT Id FROM [PackagesDummyTable] SP WHERE SP.[Version] = SourceTable.[Version] AND SP.[Name] = SourceTable.[Name])
        )    

        WHEN NOT MATCHED BY TARGET                                -- If the records in the Customer table is not matched?-- then INSERT the record
            THEN INSERT ([Guid], [PackageId], [CName], [UUID], [MAC], [Date], [isUninstalled], [LastUpdatedDateTime], [DataCapturedTime], [SGuid], [UniqueId], [MId], [EId])
                Select SourceTable.Guid,SP.PackageId,SourceTable.CName,SourceTable.UUID,SourceTable.MAC,SourceTable.Date,SourceTable.isUninstalled,GETUTCDATE(),SourceTable.DataCapturedTime,SourceTable.SGuid, SourceTable.UniqueId, SourceTable.MId, SourceTable.EId
                FROM [PackagesDummyTable] SP WHERE SP.[Version] = SourceTable.[Version] AND SP.[Name] = SourceTable.[Name];

我指的是https://msdn.microsoft.com/en-us/library/bb510625.aspx。我的语法似乎是正确的。谁可以帮我这个事。我正在使用SQL Azure。

Answer 1

如果您想要执行多个MERGE操作，

CRUD会很好。在这种情况下，我们只需要插入新记录。你能尝试这样的事吗：

INSERT INTO ([Guid], [PackageId], [CName], [UUID], [MAC], [Date], [isUninstalled], [LastUpdatedDateTime], [DataCapturedTime], [SGuid], [UniqueId], [MId], [EId])
SELECT SourceTable.Guid,SP.PackageId,SourceTable.CName,SourceTable.UUID,SourceTable.MAC,SourceTable.Date,SourceTable.isUninstalled,GETUTCDATE(),SourceTable.DataCapturedTime,SourceTable.SGuid, SourceTable.UniqueId, SourceTable.MId, SourceTable.EId
-- we need these two tables in order to import data
FROM UDTableName AS SourceTable     
INNER JOIN [PackagesDummyTable] SP 
    ON SP.[Version] = SourceTable.[Version] 
    AND SP.[Name] = SourceTable.[Name]
-- we are joing this table in order to check if there is new data for import
LEFT JOIN [dbo].[TableName] AS TargetTable  
    ON TargetTable.[EId] = SourceTable.[EId]
    AND TargetTable.[MId] = SourceTable.[MId]
-- we are importing only the data that is new
WHERE TargetTable.PackageId IS NULL;

Answer 2

正如@gotqn所说，如果你只需要访问新数据，你可以直接插入语句。

如果要求您必须使用MERG INTo，您可以将脚本更改为

    MERGE [dbo].[TableName] AS TargetTable      
    USING (
            SELECT UN.[EId],UN.[MId],SP.ID ,UN.Guid,SP.PackageId,UN.CName,UN.UUID,UN.MAC,UN.Date,UN.isUninstalled
                  ,UN.DataCapturedTime,UN.SGuid, UN.UniqueId
            FROM  UDTableName AS UN AS 
            INNER JOIN  [PackagesDummyTable] SP  ON SP.[Version] = UN.[Version] AND SP.[Name] = UN.[Name]  
         )  SourceTable          
    ON TargetTable.[EId] = SourceTable.[EId]
    AND TargetTable.[MId] = SourceTable.[MId]
    AND TargetTable.PackageId = SourceTable.Id

    WHEN NOT MATCHED BY TARGET                                -- If the records in the Customer table is not matched?-- then INSERT the record
        THEN INSERT ([Guid], [PackageId], [CName], [UUID], [MAC], [Date], [isUninstalled], [LastUpdatedDateTime], [DataCapturedTime], [SGuid], [UniqueId], [MId], [EId])
            VALUES( SourceTable.Guid,SourceTable.PackageId,SourceTable.CName,SourceTable.UUID,SourceTable.MAC,SourceTable.Date,SourceTable.isUninstalled,GETUTCDATE(),SourceTable.DataCapturedTime,SourceTable.SGuid, SourceTable.UniqueId, SourceTable.MId, SourceTable.EId)
    ;

在合并查询的Insert语句中使用Select From表

2 个答案: