This chapter covers basic reference material on how to write programs in PL/SQL and their examples. PL/SQL allows dependencies between commands within the same block of code. It also allows for parameter passing up and down code block hierarchies. PL/SQL contains a definition of variable scope...
方法一: 设置环境变量,点击我的电脑--〉属性--〉高级-〉环境变量,增加:NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK,ZHS16GBK 与自己的数据库编码一致,保存后重新启动PL/SQL, 问题解决了吧? 方法二:写一个批处理plsql. bat放到plsqldeveloper安装目录下,内容如下: set nls_lang=SIMPLIFIED CHINESE_CHINA.ZHS16...
·函数:Create or replace function funcname(参数列表) return返回值as PL/SQL语句块 5.游标的定义为:用游标来指代一个DML SQL操作返回的结果集。即当一个对数据库的查询操作返回一组结果集时,用游标来标注这组结果集,以后通过对游标的操作来获取结果集中的数据信息。这里特别提出游标的概念,是因为它在PL/SQL...
PL/SQL Basic LoopBasic loop or simple loop is preferred in PL/SQL code when there is no surety about how many times the block of code is to be repeated. When we use the basic loop the code block will be executed at least once....
SQL 本身就是一个奇妙的存在 SQL 则完全不同,知道如何编写嵌套 SELECT 语句并不意味着你就了解 SQL。我学过我非常喜欢的 MySQL、微软的 T-SQL 和 PL/SQL,还曾在 MySQL、MSSQL、Oracle 和大量其他数据库管理系统上为存储过程、函数、触发器和视图编写了数千行代码。
Basic statements,PolarDB:This topic describes the basic PL/SQL statements. You can assign a value to a PL/SQL variable by using the following syntax:
The PL/SQL basic block coverage interface helps you ensure some quality, predictability and consistency, by assessing how well your tests exercise your code.
$$ LANGUAGE sql; then the following Code: CREATE OR REPLACE FUNCTION demo () RETURNS text AS $$ BEGIN PERFORM test(); RETURN ’OK’; END; $$ LANGUAGE plpgsql; Here is the another format Code: CREATE OR REPLACE FUNCTION demo ()
Use database links within PL/SQL code to declare a local variable of a remote user-defined type Convey a user-defined type argument or return value in a PL/SQL remote procedure call.
This section describes the declaration of variables in the PL/SQL and the scope of this variable in codes.Variable declarationFor the variable declaration syntax, see Fig