WITH FUNCTION语句概述 WITH FUNCTION 仅在 GBase 8s 的 ORACLE 模式下支持。WITH FUNCTION 语句用于临时声明并定义存储函数。WITH FUNCTION 定义的函数对象不会存储到系统表中，且只在当前 SQL 语句内有效。说法图如下：说明及限制 <WITH FUNCTION> 语句定义函数 <function_declaration> 作用域<with_select_block > ...
FUNCTION with_function(p_id IN NUMBER) RETURN NUMBER IS BEGIN RETURN p_id; END; SELECT with_function(id) FROM test WHERE rownum = 1 / WITH_FUNCTION(ID) --- 1 SQL> 有意思的是,当WITH子句中包含PL/SQL声明时,分号";"不再能用作SQL语句的终止符。如果我们使用它,SQL*Plus会等待更多命令文本...
FUNCTION with_function(p_id IN NUMBER) RETURN NUMBER IS BEGIN RETURN p_id; END; SELECT with_function(id) FROM test WHERE rownum = 1 / WITH_FUNCTION(ID) --- 1 SQL> 有意思的是,当WITH子句中包含PL/SQL声明时,分号";"不再能用作SQL语句的终止符。如果我们使用它,SQL*Plus会等待更多命令文本...
Serverless, high performant Oracle Database service that runs all workloads, including OLTP, analytics, batch, JSON, Internet of Things (IoT), and more. NoSQL Predictable single-digit millisecond performance at scale, suitable for applications with dynamic I/O rate or for serverless applications; ...
Getting Started with Oracle SQL Developer 3.0 PurposeThis tutorial introduces Oracle SQL Developer 3.0 and shows you how to manage your database objects.Time to CompleteApproximately 50 minutesOverviewOracle SQL Developer is a free graphical tool that enhances productivity and simplifies database ...
The MIN function returns the minimum value of the expression you provide it. This is almost the same as the lowest value. Just like theMAXfunction, it’s a standard SQL function, so it works in many versions of SQL (Oracle, SQL Server, MySQL, PostgreSQL, and more) ...
SQL JSON Vector|Vector Documentation Graph|Graph Documentation Spatial Sample Code Database EE PL/SQL Learn how to use Oracle Sharding for mission-critical, internet-scale apps IMDB Toolkit for SAP NetWeaver Integrate, Analyze and Act on All Data using Autonomous Database ...
在做项目的过程中,一个页面使用类似例如以下的SQL查询数据。为了保密和使用方便,我把项目中有关的表名和字段替换使用ORACLE数据库中的系统表和字段。 在我所做的项目中。类似ALL_TABLES的表中大概有8W多条数据,以下这个查询SQL非常慢。 WITH PARAMS AS (SELECT
An Oracle By Example (OBE) tutorial,Performing a Unit Test of Your PL/SQL in Oracle SQL Developer 2.1, is similar to this one, but it uses a copy of the EMPLOYEES table from the Oracle sample HR schema, which includes more columns and rows as well as different data. For information ab...
MIN– This function gets the lowest of the supplied values. It’s the opposite of the MAX function. SUM– This function adds up all of the values supplied to it. COUNT– This function counts the number of values supplied. You can find a full list ofOracle SQL functions here. Other func...