ORACLE的解析器按照从右到左的顺序处理FROM子句中的表名，FROM子句中写在最后的表(基础表 driving

table)将被最先处理，在FROM子句中包含多个表的情况下,你必须选择记录条数最少的表作为基础表。如果有3个以上的表连接查询,

-ORACLE resolver in accordance with the right-to-left order in FROM clause in the deal table, FROM clause in the final table (based on Table driving table) will be the first to deal with, in the FROM clause contains more than one table circumstances, you must select at least the number of records as the basis of the table table. If there are three or more table join queries,