Contents Overview and IntroductionHow Analytic Functions WorkThe SyntaxExamplesCalculate a running TotalTop-N Queries Example 1 Example 2Windows Range Windows Compute average salary for defined range Row Windows Accessing Rows Aroun…
标记一下,慢慢看 http://www.oracle-base.com/articles/misc/articles-misc.php Miscellaneous Articles DBA Development Middleware Application Express (APEX) MySQL Operating System Installations Oracle VM Others DBA AutoNumber And Identity Functionality - Implem…
Oracle 10gR2分析函数汇总 (Translated By caizhuoyi 2008‐9‐19) 说明: 1. 原文中底色为黄的部分翻译存在商榷之处,请大家踊跃提意见: 2. 原文中淡蓝色字体的文字,不宜翻译,保持原样. 1. ANALYTIC FUNCTIONS Analytic functions compute an aggregate value based on a group of rows. They differ from aggregate functions…
LAST UPDATE: 1 Dec 15, 2016 APPLIES TO: 1 2 3 4 Oracle Database - Enterprise Edition - Version 7.0.16.0 and later Oracle Database - Standard Edition - Version 7.0.16.0 and later Oracle Database - Personal Edition - Version 7.1.4.0 and later I…
oracle查询:取出每组中的第一条记录按type字段分组,code排序,取出每组中的第一条记录 方法一: select type,min(code) from group_info group by type; 注意:select 后面的列要在group by 子句中,或是用聚合函数包含,否则会有语法错误. 方法二: SELECT * FROM(SELECT z.type , z.code ,ROW_NUMBER()OVER(PARTITION BY z.type ORDER BY z.cod…