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mysql数据求和操作,更新问题

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Release: 2016-06-06 09:33:23
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mysql

BEGIN
INSERT INTO t_order_pricesum(r_company,priceSum)
SELECT r_company,sum(price) FROM t_order GROUP BY r_company;

END

我把t_order表中的数据筛选求和后插入t_order_pricesum里,
但t_order更新后再执行函数,因为原来有值了,无法更新,
怎么做才能在不删除t_order_pricesum表里的数据的情况下,更新数据。

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