摘要: 说到连表查询,我们先了解下别名。别名可以用在表上,也可以用在表中参数名。即 SELECT "表格别名". "表中参数名" "表中参数别名" FROM “表格名” "表格别名" 或 SELECT "表格别名". "表中参数名" AS "表中参数别名" FROM “表格名” AS "表格别名" 举个例子 阅读全文
posted @ 2023-06-18 21:15 Alpha_To_Beta 阅读(131) 评论(0) 推荐(0)