摘要: 常规写法: select * from temp where 字段1 is null and 字段2 is not null or 字段1 is not null and 字段2 is null 高级写法: select * from temp where decode(字段1,null,0,1) 阅读全文
posted @ 2021-08-27 17:07 网瘾少女 阅读(2225) 评论(0) 推荐(0)