打开行集和游标

问题描述

我创建了一些代码来检索传递的excel文件表和列名。然后，我想使用游标将每个工作表名称中的数据插入表中，因为可能有多个工作表。我认为问题在于游标没有正确设置变量@sheetname。问题是什么？注意：下面的查询已修改，不是我在sql中执行的查询。我对以下代码有疑问：

----------------Create Excel info table------------------------
    DECLARE @SheetNames TABLE (
        TABLE_CAT NVARCHAR(50) NULL,TABLE_SCHEM NVARCHAR(50),table_name NVARCHAR(50),TABLE_TYPE NVARCHAR(50),REMARKS NVARCHAR(50)
    )

    DECLARE @ColNames TABLE (
        TABLE_CAT NVARCHAR(30),TABLE_SCHEM NVARCHAR(30),table_name NVARCHAR(30),column_name NVARCHAR(30),data_type SMALLINT,type_name NVARCHAR(30),COLUMN_SIZE INT,BUFFER_LENGTH INT,DECIMAL_DIGITS SMALLINT,NUM_PREC_RADIX SMALLINT,NULLABLE SMALLINT,REMARKS NVARCHAR(254),COLUMN_DEF NVARCHAR(254),sql_DATA_TYPE SMALLINT,sql_DATETIME_SUB SMALLINT,CHAR_OCTET_LENGTH INT,ORDINAL_POSITION SMALLINT,IS_NULLABLE NVARCHAR(254),SS_DATA_TYPE tinyint
    )


    DECLARE @ExcelInfo TABLE (
        SheetName NVARCHAR(50),ColName NVARCHAR(50)
    )

    DECLARE @FILEPATH NVARCHAR(500) = @Path + '\' + @File;

    DECLARE @linkedServerName NVARCHAR(30) = 'x'


    -- Remove existing Linked Server (if necessary)
    IF EXISTS (SELECT
                NULL
            FROM sys.servers
            WHERE Name = @linkedServerName)
    BEGIN
        EXEC sp_dropserver @server = @linkedServerName,@droplogins = 'droplogins'
    END



    EXEC sp_addlinkedserver @server = @linkedServerName,@srvproduct = 'ACE 12.0',@provider = 'Microsoft.ACE.OLEDB.12.0',@datasrc = @FILEPATH,@provstr = 'Excel 12.0;HDR=Yes'

    -- Grab the current user to use as a remote login
    DECLARE @suser_sname NVARCHAR(256) = 'SA'

    -- Add the current user as a login
    EXEC sp_addlinkedsrvlogin @rmtsrvname = @linkedServerName,@useself = 'false',@locallogin = @suser_sname,@rmtuser = NULL,@rmtpassword = NULL

    -- Return the table/column info

    INSERT INTO @SheetNames
    EXEC sp_tables_ex @linkedServerName

    INSERT INTO @ColNames EXEC sp_columns_ex @linkedServerName
    ;

    WITH a
    AS
    (SELECT
            *
        FROM @SheetNames 
        
    INSERT INTO @ExcelInfo

        SELECT
            a.table_name,sn.column_name
        FROM @ColNames sn
        JOIN a
            ON a.table_name = sn.table_name


----------------End of Excel info table creation------------------------
SELECT * FROM @ExcelInfo 
WHERE SheetName LIKE '''Er%'
    DECLARE @Ericsson_Availability TABLE (
        [Date] DATETIME,ElID NVARCHAR(50),ElID1 NVARCHAR(50),[TCH NVARCHAR(10),[TCH2 NVARCHAR(50)
    );
    DECLARE @SHEETNAME NVARCHAR(500)
    BEGIN TRY 
    DECLARE FetchNames CURSOR LOCAL FOR
    
    SELECT disTINCT
        SheetName
    FROM @ExcelInfo
    WHERE SheetName LIKE '''Er%'
    OPEN FetchNames;
    FETCH NEXT FROM FetchNames INTO
    @SHEETNAME
    WHILE @@fetch_status = 0
    BEGIN
    
    INSERT INTO @Availability
    EXEC ('
SELECT  *
FROM  Openrowset(''Microsoft.ACE.OLEDB.12.0'',''Excel 12.0 Xml;HDR=YES;Database=' + @FILEPATH + ''',''
SELECT     
      *

FROM    [' + @SHEETNAME + ']
'') oro')

 
    FETCH NEXT FROM FetchNames INTO
    @SHEETNAME
    END
    CLOSE FetchNames
    DEALLOCATE FetchNames

    
    
    
        SELECT
            *
        FROM  @Availability;
        END TRY
        BEGIN CATCH
        PRINT ERROR_LINE()
        PRINT ERROR_MESSAGE()
        PRINT ERROR_STATE()
        END CATCH
END;

解决方法

我找到了解决方法！关于字符串串联的概念。在插入cod的（openrowset）部分之前，我应该使用replace函数，以便在openrowset部分要运行之前和之后以单引号的方式更改@sheetname的值。像这样的东西：

SET @SHEETNAME = REPLACE（@SHEETNAME，``''，``''''）

cursor openrowset tsql