Oracle中的层次查询详解1 语法格式2 语法解释3 层次查询的限制4 层次查询的增强特性5 演示
1 语法格式select [level], column, expr... from table [where condition] start with condition connect by [prior column1= column2 | column1 = prior column2];2 语法解释层次查询是通过start with...
