INSERT INTO `b_common_member_count` (uid) SELECT uid FROM `b_common_member` WHERE uid NOT IN (SELECT uid FROM `b_common_member_count`)
把b_common_member里的uid，不重复的全部插入到b_common_member_count的uid里。
MYSQL INSERT INTO SELECT 不插入重复数据
原文：http://www.cnblogs.com/kingfly/p/4283397.html