如果设备是新设备,则可能没有任何数据,因此会导致divide by zero。1 )) AS avg_l_day 我尝试过围绕除法子查询使用 浏览17提问于2021-02-10得票数 0 回答已采纳 1回答 无法理解有关更新行锁的PostgreSQL文档 、 当锁子句出现在子选择中时,锁定的行是子查询返回到外部查询的行。这可能比单独检查子查询所显示...
Postgresql divide by zero caused by subquery, Postgresql divide by zero caused by subquery. Ask Question Asked 1 year, 4 months ago. Modified 1 year, If the device is new it may not have any data and it is causing divide by zero. My query is: PostgreSQL error: Fatal: role "username"...
我现在尝试添加另一个公式列,通过使用下面的公式将返回的数量除以销售数量,但收到错误" error : Possible Divide by Zero“我认为问题是NetSuite引用(-)为负的返回数量,我需要弄清楚如何让它通过使用绝对值而不使用(-)负的方式计算此公式。这可以通过case语句表达式来实现吗?公式: Case</e 浏览11提问于20...
例6:ZERO_DIVIDE异常,用数字除以零。 DECLARE v_width INTEGER; v_height INTEGER := 0; v_area INTEGER := 6; BEGIN v_width := v_area / v_height; dbms_output.put_line('v_width = ' || v_width); EXCEPTION WHEN zero_divide THEN dbms_output.put_line('Division by zero'); END; BEGIN...
RAISE zero_divide; EXCEPTION WHEN zero_divide THEN RAISE NOTICE '% %', sqlcode, sqlerrm; END; 结果显示如下: NOTICE: 1 User-Defined Exception 主动抛出异常 除了因为系统出错导致自动抛出内部异常外,您可以采用以下三种方式主动抛出异常。示例如下: ...
(numerator/another_label.denominator);--这个会报错,因为引用的是内部的,这个值是0 EXCEPTION WHEN ZERO_DIVIDE THEN DBMS_OUTPUT.PUT_LINE('Divide-by-zero error: can''t divide ' || numerator || ' by ' || denominator); WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE('Unexpected error.'); END another...
WHEN division_by_zero THEN RETURN 0; --处理除零异常 END; $$ LANGUAGE plpgsql; 上述代码创建了一个名为divide_numbers的函数,用于进行两个数相除的计算。如果除数为零,则会抛出一个自定义的异常,并在异常处理块中返回0。 此外,可以使用BEGIN、COMMIT和ROLLBACK等语句来控制函数的事务行为。通过事务控制,可以...
Then we divide the total of male members by the total of female members to get the ratio. In this case, it returns 200%: Male/Female ratio --- 200 (1 row) Fourth, delete a female member: DELETE FROM members WHERE gender = 2; And execute the query to calculate the male/female...
在这个例子中,我们定义了一个名为divide_numbers的存储过程,它接受两个整数参数并返回它们的商。如果第二个参数(除数)为零,存储过程将抛出一个异常。EXCEPTION块用于捕获division_by_zero异常,并在捕获到异常时执行特定的操作,这里我们选择返回NULL并打印一条通知信息。
To set work_mem, take the number of connections, add 32, divide by your astrological sign expressed as a number (Aquarius is 1), convert it to base 7, and then read that number in decimal megabytes. So, I am here to tell you that every formula setting work_mem is wrong. Every. Si...