摘要: 关于SQL的各种连接详情:https://www.cnblogs.com/Swaggy-yyq/p/14267882.html SQL SERVER: 左连接: select a.* from a, b where a.id *=b.id; 右连接: select a.* from a, b whe 阅读全文
posted @ 2020-12-18 10:56 Haoeaoi 阅读(173) 评论(0) 推荐(0)