SQL，PL-SQL和T-SQL有什么区别? [英] What is the difference between SQL, PL-SQL and T-SQL?

问题描述

SQL，PL-SQL和T-SQL有什么区别?

What is the difference between SQL, PL-SQL and T-SQL?

谁能解释这三者之间的区别，并提供可以适当使用它们的方案?

Can anyone explain what the differences between these three are, and provide scenarios where each would be relevantly used?

推荐答案

• SQL是用于对集合进行操作的查询语言.

  • SQL is a query language to operate on sets.

    它或多或少是标准化的，并且几乎被所有关系数据库管理系统使用:SQL Server，Oracle，MySQL，PostgreSQL，DB2，Informix等.

    It is more or less standardized, and used by almost all relational database management systems: SQL Server, Oracle, MySQL, PostgreSQL, DB2, Informix, etc.

    PL/SQL是Oracle使用的专有过程语言

    PL/SQL is a proprietary procedural language used by Oracle

    PL/pgSQL是PostgreSQL使用的过程语言

    PL/pgSQL is a procedural language used by PostgreSQL

    TSQL是Microsoft在SQL Server中使用的专有过程语言.

    TSQL is a proprietary procedural language used by Microsoft in SQL Server.

    过程语言旨在扩展SQL的能力，同时能够与SQL很好地集成.添加了一些功能，例如局部变量和字符串/数据处理.这些功能使图灵语言变得完整.

    Procedural languages are designed to extend SQL's abilities while being able to integrate well with SQL. Several features such as local variables and string/data processing are added. These features make the language Turing-complete.

    它们还用于编写存储过程:驻留在服务器上的代码段，用于管理复杂的业务规则，而这些业务规则很难或根本无法通过基于纯集合的操作来管理.

    They are also used to write stored procedures: pieces of code residing on the server to manage complex business rules that are hard or impossible to manage with pure set-based operations.

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