pl SQL数据类型-阿里云

[帮助文档] 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。

[帮助文档] 使用DBMS_AQ包中的存储过程添加/删除消息以及注册或注销PL/SQL回调存储过程

您可以使用DBMS_AQ包中的存储过程添加消息到队列、从队列中删除消息、注册或注销PL/SQL回调存储过程。

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PL/SQL数据类型

1、变量和常量变量语法： variable_name data_type [[NOT NULL] [:=VALUE]] 说明：NOT NULL对变量定义非空约束，必须为变量赋非空的初始值，并且不允许在任何时候将其值修改为NULL。 --变量样例...

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更新时间 2022-09-01 15:53:49

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