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GBase 8s V8.8 SQL 指南:教程-6.2
2022-04-22 22:05:00 【GBASE数据库】
6.2 创建高级连接
创建连接一节显示如何在 SELECT 语句中包括 WHERE 子句以在一个列或多个列上连接
两个或多个表。它说明了自然连接和等值连接。
本章讨论如何使用两种更复杂的连接:自连接和外连接。如对简单连接描述的那样,可以
为表定义别名并将显示标号指定给表达式以缩短多表查询时间。还可以带 ORDER BY 子
句发出 SELECT 语句,这将把数据排序到临时表中。
版权声明
本文为[GBASE数据库]所创,转载请带上原文链接,感谢
https://blog.csdn.net/weixin_47390342/article/details/124351746
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