Question

这发生在第4行。

UPDATE CashBalances 
   SET Balance1=0,
       Balance2=0 
 WHERE PID=100040 
   AND Date='20081024' 

IF @@ROWCOUNT=0 
  INSERT INTO CashBalances(PID,Date,BalanceCode,Balance1,Balance2,CCY)
    VALUES (100040 ,'20081024', (SELECT TOP 1 balancecode 
                                   FROM cashbalances 
                                  WHERE date=(SELECT MAX(Date) 
                                                FROM CashBalances 
                                               WHERE PID=100040) 
  IF @@ROWCOUNT = 0 SELECT 'I' AS balancecode),0,0,' ')

我正在尝试检索一个平衡代码，其中日期是特定pid的最大值。如果返回零行，则返回'I'作为余额代码。

感谢。

Answer 1

只需创建另一个valiable然后插入它：

IF (SELECT COUNT(PID) FROM CashBalances WHERE PID=100040) > 0
BEGIN
    UPDATE CashBalances SET Balance1=0,Balance2=0 WHERE PID=100040 AND Date='20081024';
END
ELSE
BEGIN
    --Here your create it, could be that you use different type
    DECLARE @ConditionalValue NVARCHAR(MAX) = 'I';

    --Here you set it with a right value that you need on condition
    IF @@ROWCOUNT > 0 
    SET @ConditionalValue = (SELECT TOP 1  
                                FROM cashbalances 
                                WHERE date=(SELECT MAX(Date) 
                                        FROM CashBalances 
                                        WHERE PID=100040))
    --Insert your final value
    INSERT INTO CashBalances(PID, Date, BalanceCode, Balance1, Balance2, CCY)
    VALUES (100040 ,'20081024', @ConditionalValue,0,0,' ')
END

Answer 2

坚持选择或值。不是都。正如Arvo所提到的，你不能在查询中使用if。你可以改用案例，但你不需要它。

update CashBalances 
set Balance1=0, Balance2=0 
where PID=100040 AND Date='20081024' 

if @@ROWCOUNT=0 
Begin
    declare @Balancecode char(1)='I'

    select top 1 @Balancecode =  balancecode
    from cashbalances cb
    where PID=100040
    order by date desc

    insert into CashBalances(PID,Date,BalanceCode,Balance1,Balance2,CCY)
    values (100040 ,'20081024', @balanceCode,0,0,' ')
end

Answer 3

您可以采用不同的方式进行此操作。

如果PID=100040 AND Date='20081024'上没有数据，则插入查询将起作用。

DECLARE @Query NVARCHAR(MAX) = '
    INSERT INTO CashBalances(PID,Date,BalanceCode,Balance1,Balance2,CCY)
    VALUES 
    (
        100040 ,
        ''20081024'',
        COALESCE ((SELECT TOP 1 balancecode FROM cashbalances WHERE date=(SELECT MAX(Date) FROM CashBalances WHERE PID=100040), ''I'',
        0,
        0,
        '' ''
    )';


SELECT @Query = 'UPDATE CashBalances 
                    SET Balance1=0,
                    Balance2=0 
                  WHERE PID=100040 
                 AND Date=''20081024''
                 '
WHERE 
    PID=100040 AND 
    Date='20081024' 


EXECUTE sp_executesql @Query

Answer 4

UPDATE CashBalances SET Balance1=0,Balance2=0 WHERE PID=258 AND 
Date='20081024' 

IF @@ROWCOUNT = 0  
BEGIN 
DECLARE @BalCode Char(1) 
SET @BalCode = ISNULL((SELECT TOP 1 Balancecode
FROM CashBalances 
WHERE Date=(SELECT MAX(Date) FROM CashBalances WHERE PID=258)),'I')

INSERT INTO CashBalances(PID,Date,BalanceCode,Balance1,Balance2,CCY)
VALUES (258 ,'20081024',@BalCode,0,0,' ')
END

--- @ teo van tok

关键字“选择”附近的语法不正确。用于平衡代码

4 个答案: