create or replace type "emp_table_type" as table of "emp_row_type"; --创建函数 create or replace function fn_GetEmpnoByPipe(p_ename in varchar2) return "emp_table_type" pipelined is emp_row "emp_row_type"; --定义emp_row为行对象类型 begin for currow in (select empno,ename from e...
在Oracle中,我尝试用User-Defined数据类型这样做: CREATE OR REPLACE TYPE TABLE_RES_OBJ AS OBJECT ( id NUMBER ); CREATE OR REPLACE TYPE TABLE_RES AS TABLE OF TABLE_RES_OBJ; CREATE OR REPLACE FUNCTION region_parents (regionId IN INTEGER) RETURN TABLE_RES IS cteresult TABLE_RES; BEGIN WITH c...
end f_test_array;/select*fromtable(f_test_array(10));select*fromthe(selectf_test_array(10)fromdual);/*2、table()结合PIPELINED函数:*/create or replace function f_test_pipe(ninnumberdefaultnull)returnt_test_table PIPELINEDasv_test t_test_table :=t_test_table(); beginforiin1.. nvl(n,1...
table_name, column_name, row_value ,effective date The GET_TABLE_VALUE function returns the value of a cell in a user-defined table. The three text operands, which identify the cell (table_name, column_name, and row_value), are mandatory. The date operand is optional. If it is not ...
Oracle FIRST_VALUE() function examples We’ll use theproductstable from thesample databaseto demonstrate theFIRST_VALUE()function: The following example returns the product id, product name, list price, and the name of the product with the lowest price: ...
first_value() over(partition by … order by …):求分组后的第一个。 last_value() over(partition by … order by …):求分组后的最后一个。 count() over(partition by … order by …):求分组后的总数。 max() over(partition by … order by …):求分组后的最大值。
表值函数 ## 概述在MySQL数据库中,表值函数(Table-Valued Function)是一种特殊类型的函数,它可以返回一个结果集,该结果集可以像表一样被查询和操作。本文将你展示如何创建一个MySQL表值函数。 ## 创建值函数的步骤 以下表格展示了创建表值函数的步骤及每个步骤所需完成的任务。 | 步骤| 任务 | | ---...
1.Table()函数: set feedback off create or replace type type_int_date_varchar2 as object (i integer, d date, v varchar2(99)) / create or replace type table_int_date_varchar2 as table of type_int_date_varchar2 / create or replace function f_int_date_varchar2 return table_int_date...
Example:select * from table(manprivs.ListTabPrivs(‘sh,hr’,“,‘select,update,delete,insert’,'N‘,'PUBLIC’));*/Function ListSysPrivs(ObjOwner varchar2 default null) return PrivsList pipelined; 1. 2. 3. 4. 产看对象的系统权限
RAW if the measure column is RAW; otherwise the return value is VARCHAR2. Aggregate Examples The following single-set aggregate example lists all of the employees in Department 30 in the hr.employees table, ordered by hire date and last name: SELECT LISTAGG(last_name, ‘; ‘) WITHIN GROUP...