pl SQL变量的相关内容

问答 2024-08-15 来自：开发者社区

在PL/SQL函数中，声明和引用变量及中间结果遵循什么原则？

阿里云文档 2024-07-26

PolarDBPostgreSQL有哪些PL/SQL的错误和消息

本文介绍了错误和消息的相关内容。

文章 2024-04-19 来自：开发者社区

Oracle的PL/SQL定义变量和常量：数据的稳定与灵动

在Oracle的PL/SQL世界中，变量和常量就像是我们生活中的“容器”，用来存储和管理数据。变量是那些灵动多变的容器，它们可以随着程序的运行而不断变化；而常量则是那些稳定不变的容器，一旦赋予了初始值，就始终如一。作为一位资深的Oracle数据管理员，今天我将带领大家走进这个充满变化与稳定的变量和常...

阿里云文档 2023-12-14

PolarDBPostgreSQL版PL/SQL的基本语句_云原生数据库PolarDB PostgreSQL版（兼容Oracle）_云原生数据库 PolarDB(PolarDB)

本文介绍了基本语句的相关内容。

阿里云文档 2023-12-14

PolarDBPostgreSQL版PL/SQL的声明信息_云原生数据库PolarDB PostgreSQL版（兼容Oracle）_云原生数据库 PolarDB(PolarDB)

本文介绍了PL/SQL的声明信息。

文章 2023-05-05 来自：开发者社区

PL/SQL编程—变量

SQL> declare 2 c_tax_rate number(3,2):=0.03; 3 v_name varchar2(20); 4 v_passwd varchar2(20); 5 v_sale number(7,2); 6 v_tax_sale number(7,2); 7 begin 8 select name,passwd,salar...

阿里云文档 2023-03-21

如何创建PolarDBO引擎的PL/SQL子类型

PolarDB PostgreSQL版（兼容Oracle）支持用户定义的PL/SQL子类型和（子类型）别名。子类型是具有一组可选约束的数据类型，这些约束限制可以存储在该类型的列中的值。适用于该子类型所基于的类型的规则仍然适用，但您可以使用其他约束限制该类型中存储值的精度或小数位数。

文章 2022-02-17 来自：开发者社区

PL/SQL学习笔记_01_基础：变量、流程控制

PL/SQL语句可以在Oracle客户端的 SQL窗口或者 command 窗口中运行在SQL窗口中运行步骤同 SQL语句在command 窗口中运行的步骤如下： 1）File—new command window，出现下图 2）输入命令：set serveroutput on ，回车执行 ...

文章 2022-02-16 来自：开发者社区

PL/SQL编程之变量

对于PL/SQL编程，准确的说oracle数据库存储过程这一部分，哎呀，当初学习的时候感觉老难了。其实很简单，就是多学几遍，学不会再学。慢慢的，就可以搞定了。心得传授完毕，言归正传。下面来讲一下plsql变量相关的知识：先来看一下下面这段代码： declare   v_num number(20); begin   dbms_output.put_line('请输出：'||...

文章 2022-02-16 来自：开发者社区

复合变量可以将不同数据类型的多个值存储在一个单元中。由于复合类型可以由用户自己根据需要定义其结构，所以复合数据类型也称为自定义数据类型。在PL/SQL中，使用%TYPE声明的变量类型与数据表中字段的数据类型相同，当数据表中字段数据类型修改后，PL/SQL程序中相应变量的类型也自动随之改变。如EMP表中有一个ENAME字段，其数据类型为VARCHAR2(30),声明变量v_name用来存放E.....

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