摘要: MySLQ IF(exp1,exp2,exp3) => 如果exp1为true,则返回exp2, 否则,返回exp3 SELECT IF(age>=25,"25岁及以上","25岁以下") age_cut,count(*) numberFROM user_profileGROUP BY age_cu 阅读全文
posted @ 2021-11-28 22:29 晨义 阅读(429) 评论(0) 推荐(0)