如何從單個參數獲取多個值到SQL Server中的過程中

Question

請幫我解決以下問題。

我想從單個參數獲取多個值到SQL Server中的過程，我正在學習SQL和C＃。

這裏是我的代碼：

ALTER PROCEDURE AProc_Getback 
    (@fcode VARCHAR(10)) 
AS 
BEGIN 
    UPDATE t_PALM_PersonnelFileMst 
    SET fdflag = 0, frdate = null, fddate = null, 
     fdtype = null, fdreason = null 
    WHERE fcode IN ('@fcode') 

    DELETE FROM t_pald_dimissiontrm 
    WHERE fcode IN ('@fcode') 
END 

Exec AProc_Getback '512888,512889' 

非常感謝

Answer 1

Use Table-Valued Parameters

CREATE TYPE FCodes AS TABLE ( 
    Code VARCHAR(32) -- Use type of "fcode" column 
); 

存儲過程

ALTER PROCEDURE AProc_Getback 
(
    @fcode FCodes 
) 
AS 
BEGIN 
    UPDATE t_PALM_PersonnelFileMst SET 
     fdflag = 0, 
     frdate = null, 
     fddate = null, 
     fdtype = null, 
     fdreason = null 
    WHERE fcode IN (SELECT Code FROM @fcode) 

    DELETE FROM t_pald_dimissiontrm 
    WHERE fcode IN (SELECT Code FROM @fcode) 
END 

執行

DECLARE @Codes AS FCodes 
INSERT INTO @Codes VALUES ('123'), ('456'), ('789') 

EXEC AProc_Getback @Codes 

從C＃您可以創建類型的參數與DataTable的價值，並將其傳遞到存儲過程

var codesParameter = new SqlParameter 
{ 
    ParameterName = "@fcodes", 
    SqlDbType = SqlDbType.Structure, 
    TypeName = "dbo.FCodes", // Important! - name of type in database 
    Value = dataTableOfCodes // Should contain column with name "Code" 
}; 

using (var connection = new SqlConnection(connectionString)) 
using (var command = connection.CreateCommand()) 
{ 
    command.CommandText = "dbo.AProc_Getback"; 
    command.CommandType = CommandType.StoredProcedure; 
    command.Parameters.Add(codesParameter); 

    connection.Open(); 
    command.ExecuteNonQuery(); 
} 

Answer 2

Alter PROCEDURE AProc_Getback (@fcode varchar(Max) 

    ) AS 

    Begin update t_PALM_PersonnelFileMst set fdflag = 0,frdate = null,fddate = null,fdtype = null, fdreason = null where fcode in (select Item 
from dbo.SplitString(@fcode, ',')) 
    delete from t_pald_dimissiontrm where fcode in (select Item 
from dbo.SplitString(@fcode, ',')) end 

然後

Exec AProc_Getback '512888,512889' 

Answer 3

首先，你的參數必須能夠保持輸入數據。目前，它只能接收最多10個字符的數據。見@fcode varchar(10)。

如果您沒有可用的分割功能，您可以創建一個。或者，您可以使用一些內聯代碼來實現這一點。例如：

ALTER PROCEDURE AProc_Getback(@Fcode VARCHAR(MAX)) 
AS 
BEGIN 

    CREATE TABLE #FCodes (Item VARCHAR(30)); 
    DECLARE @Insert VARCHAR(MAX) = 'INSERT INTO #FCodes VALUES ('''+REPLACE(@Fcode,',','''),(''')+''');'; 
    EXEC (@Insert); 


    UPDATE t_PALM_PersonnelFileMst 
    SET 
     fdflag = 0, 
     frdate = NULL, 
     fddate = NULL, 
     fdtype = NULL, 
     fdreason = NULL 
    WHERE fcode IN(SELECT Item FROM #FCodes); 


    DELETE FROM t_pald_dimissiontrm 
    WHERE fcode IN(SELECT Item FROM #FCodes); 
END;