Question

我试图在java中创建一个sql语句，它使用timediff函数比较表中的两个sql日期对象。这就是我的陈述：

SELECT EMPLOYEEID, COUNT(ORDER_TYPE) AS BREAKFASTCOUNT, MIN(TIMEDIFF(ORDER_ACCEPTED_TIME,ORDER_COMPLETION_TIME)) AS MINPREP, MAX(TIMEDIFF(ORDER_ACCEPTED_TIME, ORDER_COMPLETION_TIME)) AS MAXPREP FROM ORDERS WHERE ORDERDATE BETWEEN '4/01/2015' AND '4/30/2015' AND ORDER_TYPE ='Breakfast' GROUP BY EMPLOYEEID

但是，当我运行此语句时，我收到错误：

java.sql.SQLSyntaxErrorException: 'TIMEDIFF' is not recognized as a function or procedure.

是否有任何理由发生此错误？

Answer 1

我希望，这是您正在寻找的查询。这显示了以分钟为单位的时差。

SELECT 
    EMPLOYEEID, 
    COUNT(ORDER_TYPE) AS BREAKFASTCOUNT,
    MIN(dateDIFF(MINUTE,ORDER_ACCEPTED_TIME,ORDER_COMPLETION_TIME)) AS MINPREP, 
    MAX(dateDIFF(MINUTE,ORDER_ACCEPTED_TIME, ORDER_COMPLETION_TIME)) AS MAXPREP 
FROM ORDERS 
WHERE ORDERDATE BETWEEN '4/01/2015' AND '4/30/2015' 
AND ORDER_TYPE ='Breakfast' 
GROUP BY EMPLOYEEID

JDBC sql中的TimeDiff函数

1 个答案: