Oracle / PLSQL:MAX Function This Oracle tutorial explains how to use the Oracle/PLSQLMAX functionwith syntax and examples. Description The Oracle/PLSQL MAX function returns the maximum value of an expression. Syntax The syntax for the MAX function in Oracle/PLSQL is: SELECT MAX(aggregate_expre...
In Oracle, the MAX function can be used in combination with the DECODE function to return the maximum value from a set of different values based on specified conditions.The syntax for using MAX and DECODE together is:```SELECT MAX(DECODE(condition, value, expression)) FROM table_name;```He...
Oracle will return 2. But I want to return null. Is it any way to do it? what I can think is: select decode(max(case when col_1 is null then 1 else 0), 1, max(col_1), null) from table_1. Is there any better way? Since I need to do the aggregate function twice. Thanks...
create or replace function get_num(CONS_ID in number) return varchar2 is v_cons_no varchar2(20); begin select max(cons_no) into v_cons_no from c_cons where cons_id = CONS_ID; return v_cons_no; end get_num; / 其中cons_id为number(16) 是表c_cons的主键 cons_no为varchar2(16) ...
Oracle10gR2 (10.2.0.2 or higher) Workarounds: setting initialisation parameter BLANK_TRIMMING=TRUE declare PL/SQL CHAR and VARCHAR2 variable used in the INTO clause of SELECT statement as 4,000 bytes. Use CAST SQL function to constraint the size to that of the variable size like ...
DB2 and Oracle Syntax: MAX ([ALL | DISTINCT] expression ) OVER (window_clause) Parameters: DBMS Support: COUNT() function Syntax diagram - MAX() function Example: To get maximum 'ord_amout' from the 'orders' table, the following SQL statement can be used : ...
oracle 如何在带左连接的SQL select中使用多个max函数输出：| 识别号|数值_1|日期_1|长度_1| | - ...
In this SQL MAX function example, we've aliased the max(salary) field as "Highest salary". As a result, "Highest salary" will display as the field name when the result set is returned. SQL MAX Function - Using SQL GROUP BY Clause example ...
实现三个函数,关键都在于处理ODCIAggregateIterate(),即下面几张图中的高亮部分。Oracle自定义聚集函数的功能很强大,笔者暂时只钻研到这一层。 f_sum(),模拟SUM()函数: 定义TYPE: create or replace type f_sum_type2 as object ( num number, static function ODCIAggregateInitialize(sctx In Out f_sum_type...
oracle中to_number字符串转数字、max取最大值、dbms_random.value生成随机数及对小数做截取,四舍五入操作的函数,程序员大本营,技术文章内容聚合第一站。