摘要： 内部临时表的类型和产生时机相关，翻译自：http://dev.mysql.com/doc/refman/5.6/en/internal-temporary-tables.htmlIn some cases, the server creates internal temporary tables while processing queries. Such a table can be held in memory and processed by theMEMORYstorage engine, or stored on disk and processed by theMyISAMstor 阅读全文