如何在查询中生成序列号?

编程入门行业动态更新时间:2024-10-19 11:35:54

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我们正在使用PostgreSQL v8.2.3.

We're using PostgreSQL v8.2.3.

如何在查询输出中生成序列号?我想为查询返回的每一行显示序列号.

How do I generate serial number in the query output? I want to display serial number for each row returned by the query.

示例: SELECT员工ID，姓名FROM员工

我希望针对每一行生成并显示序列号.

I expect to generate and display serial number against each row starting from one.

推荐答案

您有两个选择.

升级到PostgreSQL v8.4并使用 row_number()函数:

Either upgrade to PostgreSQL v8.4 and use the row_number() function:

SELECT row_number() over (ORDER BY something) as num_by_something, * FROM table ORDER BY something;