如何在选择查询中生成自动增量字段 [英] How to generate auto increment field in select query

问题描述

例如，我有一个包含2列的表，其中first_name和last_name具有这些值

For example I have a table with 2 columns, first_name and last_name with these values

Ali           Khani
Elizabette    Amini
Britney       Spears
,...

我想编写一个select查询，该查询生成如下表:

I want to write a select query that generate a table like this:

1     Ali           Khani
2     Elizabette    Amini
3     Britney       Spears
,...

感谢您的帮助.

推荐答案

如果是MySql，可以尝试

If it is MySql you can try

SELECT @n := @n + 1 n,
       first_name, 
       last_name
  FROM table1, (SELECT @n := 0) m
 ORDER BY first_name, last_name

SQLFiddle

SQLFiddle

对于SQLServer

And for SQLServer

SELECT row_number() OVER (ORDER BY first_name, last_name) n,
       first_name, 
       last_name 
  FROM table1 

SQLFiddle

SQLFiddle

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