功能在MySQL（1064错误）

查询功能在MySQL（1064错误）

CREATE FUNCTION AverageRateofProduct 
    ( p_toDate datetime, p_productBatchId longtext ) 
    RETURNS decimal(18,2) 
    BEGIN 

    Declare p_averageRate decimal(18,2) ; 

    if((SELECT IFNULL(sum(inwardQuantity),0) FROM tbl_StockPosting WHERE (date < p_toDate and productBatchId =p_productBatchId))>0) 
     then  
     set p_averageRate = 
          select IFNULL(sum((inwardQuantity * rate)/sum(inwardQuantity)),0) 
          from tbl_StockPosting where (date < p_toDate and productBatchId =p_productBatchId) ; 
    END if; 

    return IFNULL(p_averageRate,0) ; 
end

给人和错误1064在第11行

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that 
corresponds to your MySQL server version for the right syntax to use near 'selec 
t IFNULL(sum((inwardQuantity * rate)/sum(inwardQuantity)),0) 
                 fro' at line 11

来源

2013-12-23 Nisar

请试试这个：在行选择IFNULL http://stackoverflow.com/questions/11226079/set-the-variable-result-from-query – vee

变化，我认为有以下

if(SELECT IFNULL(sum(inwardQuantity),0) FROM tbl_StockPosting 
    WHERE (date < p_toDate and productBatchId = p_productBatchId))

来源

2013-12-23 06:06:13 zzlalani

示值误差（总和（（内部数量*比率）/总和（内部数量）），0） – Nisar

尝试条件这一个

SELECT IF(inwardQuantity IS NULL,0,sum(inwardQuantity * rate) /sum(inwardQuantity)) 
    from tbl_StockPosting where (date < p_toDate and productBatchId =p_productBatchId) ;

来源

2013-12-23 06:53:22 vinayak

试试这个：

CREATE FUNCTION AverageRateofProduct (p_toDate DATETIME, p_productBatchId LONGTEXT) RETURNS DECIMAL(18,2) 
    READS SQL DATA 
BEGIN 
    DECLARE p_averageRate DECIMAL(18,2); 

    IF ((SELECT IFNULL(SUM(inwardQuantity),0) FROM tbl_StockPosting sp 
     WHERE sp.date < p_toDate AND productBatchId = p_productBatchId) > 0) THEN 
     SELECT IFNULL((SUM(inwardQuantity * rate)/SUM(inwardQuantity)),0) INTO p_averageRate 
     FROM tbl_StockPosting sp WHERE sp.date < p_toDate AND productBatchId = p_productBatchId; 
    END IF; 

    RETURN IFNULL(p_averageRate,0); 
END

来源

2013-12-23 07:51:10

功能在MySQL（1064错误）

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