1.为什么有存储过程(procedure)还需要(Function) fun可以再select语句中直接调用,存储过程是不行的. 一般来说,过程显示的业务更为复杂:函数比较有针对性. create function funadd(@i int,@y int) returns int as begin return @i+@y end
alter function Fn_GetUserGroupRelation ( @DHsItemID int ) returns nvarchar(1024) begin declare @Col_HsItemID int declare @Result nvarchar(1024) set @Result='' select @Col_HsItemID = Col_HsItemID from Hs_Relation where Col_DHsItemID=@DHsItemID if @Col
select business_unit, voucher_id, listagg( vat_txn_type_cd, ',') within group (order by business_unit, voucher_id) from ps_voucher_line awhere business_unit = 'CZ090'and voucher_id like '%656'group by business_unit, voucher_id; --把一列值转化为一行用逗号隔开. 但是要去
<?php /** * SQL Parser from: http://code.google.com/p/php-sql-parser/ * License: New BSD */ class PHPSQLParser { var $reserved = array(); var $functions = array(); function __construct($sql = false) { #LOAD THE LIST OF RESERVED WORDS $this->load_res
序列 Sequence SQL Server 现在将序列当成一个对象来实现,创建一个序列的例子语法如下: CREATE SEQUENCE DemoSequence START WITH 1 INCREMENT BY 1; 使用序列的方法如下所表达的: SELECT VALUE FOR DemoSequence 序列与以前的种子列(identity)的区别很明显,种子列只限于当前列,而序列是一个对象层面的实现,则可以在多个表之间共享.这一点特点在管理软件序列号生成方面,是个不错的开始.和种子列相似
catalog . How to Add New Functions to MySQL . Features of the User-Defined Function Interface . User-Defined Function . UDF Argument Processing . UDF Return Values and Error Handling . UDF Compiling and Installing . Adding a New Native Function . UDF
http://www.oracle.com/technetwork/issue-archive/2011/11-sep/o51asktom-453438.html Our technologist caches scalar subqueries, votes for SQL, and recommends technology and community. One of the talks I gave recently at the Oracle Benelux User Group (
I tried to upgrade AX 2012 R3 Retail channel database from CU9 to CU11 for client. after generated new CreateDatabase.dll with upgraded Retail SDK, ran the Channel Configuration Utility, but got error. So I tried the sql queries from CreateDatabase p
程序包 Package 断开了依赖链 实验依赖关系: <1> 首先不使用包 -- 创建表 CREATE table t (x int); -- 创建视图 create view v as select * from t; -- 创建存储过程 create procedure p as begin for x in (select * from v) loop null; end loop; end; / -- 创建函数 create function f
function & procedure packages function --> arguments or parameters with arguments, IN, read only pass values inside the function eg : select * from emp where empno = IN OUT : write only, get value from inside the function eg : select ename into OUT
-- Function: antifraudjudge(character varying) -- DROP FUNCTION antifraudjudge(character varying); CREATE OR REPLACE FUNCTION antifraudjudge(IN loancode character varying, OUT outvalue text) RETURNS text AS $BODY$ declare stmt record; -- 声明被执行SQL变量 _
在从事软件开发的过程中,经常会涉及到在Linux下将数据库脚本文件从sh格式变为sql格式的问题.本文以一个实际的脚本文件为例,说明格式转换的过程. 1. sh文件内容 本文中的文件名为example.sh,其内容如下: #!/bin/bash function Init() { if [ -f"example.sql" ] then echo"example.sql is exits and is deleting it,then recreate it&qu
1 Overview Spark SQL is a Spark module for structured data processing. It provides a programming abstraction called DataFrames and can also act as distributed SQL query engine. 2 DataFrames A DataFrame is a distributed collection of data organized