STATIC FUNCTION ODCIAGGREGATEINITIALIZESCTX(IN OUT WM\_CONCAT\_IMPL) RETURN NUMBER,MEMBER FUNCTION ODCIAGGREGATEITERATE(SELF IN OUT WM\_CONCAT\_IMPL, P1 IN VARCHAR2) RETURN NUMBER );```还需要定义类型体：```sql CREATE OR REPLACE TYPE BODY WM_CONCAT_IMPL IS MEMBER FUNCTION ODCIAGGREGATERETURN(...
Let's dive deeper into the various aspects of using the GROUP_CONCAT function in Oracle SQL. 2.1 Basic Usage: To concatenate values from a single column, we can use the GROUP_CONCAT function within a standard SELECT statement. For example: SELECT column1, GROUP_CONCAT(column2) FROM table ...
AI代码解释 CREATEORREPLACETYPEBODYWM_CONCAT_IMPLISSTATICFUNCTIONODCIAGGREGATEINITIALIZE(SCTXINOUTWM_CONCAT_IMPL)RETURNNUMBERISBEGINSCTX:=WM_CONCAT_IMPL(NULL);RETURNODCICONST.SUCCESS;END;MEMBERFUNCTIONODCIAGGREGATEITERATE(SELFINOUTWM_CONCAT_IMPL,P1INVARCHAR2)RETURNNUMBERISBEGINIF(CURR_STRISNOTNULL)THENCURR_S...
insert into test values('aaa','1');insert into test values('bbb','2');insert into test values('ccc','5');insert into test values('ddd','3');select wm_concat(a),wm_concat(b) from test;WM_CONCAT(A) WM_CONCAT(B)1 aaa,bbb,ccc,ddd 1,2,5,3 没有问题的。drop tab...
--- 我们通过 10g 所提供的 WMSYS.WM_CONCAT 函数即可以完成 行转列的效果 1. select t.rank, WMSYS.WM_CONCAT() TIME From t_menu_item t GROUP BY 1. DEPTNO ENAME --- --- 10 CLARK, KING, MILLER 20 ADAMS, FORD, JONES, SCOTT, SMITH...
Oracle之函数concat、lpad 一、引言 程序测试需要生成大量的测试数据,且测试数据有主键,主键自增,于是决定用存储过程来实现,经过半天的查资料终于完成了,记录之,学习之 二、存储过程 格式: CREATEPROCEDUREremove_emp (employee_idNUMBER)AStot_empsNUMBER;BEGINDELETEFROMemployeesWHEREemployees.employee_id=remove_emp....
concat('1234', lpad(i,18,0)) 生成规则是,以1234开头,后跟18位自增数字的字符串 注意:使用concat函数时,里面的字符串如果是"引起的,则会提示错误,这个应该跟Oracle中'和"的用法区别有关,没有深入了解,不知道什么原因。 参考:Oracle函数大全 Oracle Function...
RETURN NUMBER );/ create or replace TYPE BODY zh_concat_im IS STATIC FUNCTION ODCIAGGREGATEINITIALIZE(SCTX IN OUT zh_concat_im)RETURN NUMBER IS BEGIN SCTX := zh_concat_im(NULL) ;RETURN ODCICONST.SUCCESS;END;MEMBER FUNCTION ODCIAGGREGATEITERATE(SELF IN OUT zh_concat_im,P1 IN VARCHAR2)
Note that WM_CONCAT is undocumented and unsupported by Oracle, meaning it should not be used in production systems. The LISTAGG function, which can produce the same output asWM_CONCAT is both documented and supported by Oracle. 1. 现有数据结构 ...
In this article, we will explore the syntax, working mechanism and other details of the CONCAT function in SQL and we will also make up various different examples about it.在本⽂中,我们将探讨SQL中CONCAT函数的语法,⼯作机制和其他细节,并且还将组成各种有关它的⽰例。