<p style="display:none"> 数据库重载： https://blog.csdn.net/pg_hgdb/article/details/78643527 https://www.cnblogs.com/ryanzheng/p/9576978.html Btree索引新增了Deduplication特性 https://www.modb.pro/db/37847 索引扫描类型：https://blog.csdn.net/qq_35260875/article/details/106084392 btree解析：https://www.jb51.net/article/204311.htm btree索引生效原则：https://blog.csdn.net/baochao95/article/details/62057633 hash 索引：https://www.jb51.net/article/205229.htm 索引管理https://www.cnblogs.com/lottu/p/7526700.html 数据库系统函数：http://postgres.cn/docs/13/functions-admin.html#FUNCTIONS-ADMIN-DBOBJECT base目录：https://blog.csdn.net/weixin_39992480/article/details/102825345 系统表： https://help.aliyun.com/document_detail/181306.html?spm=a2c4g.11186623.6.1184.27a561e2RxQKck http://postgres.cn/docs/13/views-overview.html 窗口函数 http://postgres.cn/docs/13/tutorial-window.html 窗口函数使用实例：https://www.cnblogs.com/funnyzpc/p/9311281.html http://postgres.cn/docs/13/sql-expressions.html#SYNTAX-WINDOW-FUNCTIONS http://www.imooc.com/wiki/sqlbase/sqlpractice6.html 扩展： https://www.kancloud.cn/zzgjb/pgsql/76195 https://www.jianshu.com/p/eb291cda5498 http://www.postgres.cn/v2/news/viewone/1/273 https://blog.csdn.net/enmotech/article/details/96225598 https://blog.csdn.net/asmartkiller/article/details/118399993 原理： https://www.cnblogs.com/abclife/p/11347460.html 14版本新特性： https://baijiahao.baidu.com/s?id=1700618928477213165&wfr=spider&for=pc https://cdn.modb.pro/db/125747 https://www.sohu.com/a/468238269_115128 FSM: http://blog.chinaunix.net/uid-24774106-id-3764994.html https://blog.csdn.net/pg_hgdb/article/details/79810792 </p>