A B C三个表
A数据表
B为条件设置表 BID B1 B2 B3四个字段
C为用户表CID UID等字段
统计A表 符合3个条件A1 A2 A3三个条件,这三个条件是统计用户数据得出的条件。
然后根据C表该用户CID更新的UID值
事实上就是把符合三个条件的BID的值更新到C表的CID
B表设定的条件
BID=1 B1=10 B2=100 B3=180
BID=2 B1=30 B2=150 B3=200
BID=3 B1=50 B2=180 B3=230
统计好的$A1 $A2 $A3三个条件去对比>=B表B1 B2 B3值,然后将对应条件的BID值 更新到C表的CID
请问这个怎么做?用内链接可是C表的CID只等于B表BID其中的一个值。
我现在的做法是两个sql语句,1一个查询符合条件的BID,第2个语句将符合条件的BID再更新到C
有没有办法一个mysql语句完成?
回复讨论(解决方案)
你这个三个表,只有对用2个表有对应的关联字段,在根据条件去查下,就行了,最关键是得要有关联字段才行
目前只有两个语句完成了,关联应该不太可能。

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