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SQL&MySQL查询添加字段为行号_MySQL

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Release: 2016-06-01 13:37:35
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SQL&MySQL查询添加字段为行号

 

SQL:

select row_number() over(order by col desc) ,* from table;

 

函数“row_number”必须有使用 ORDER BY 的 OVER 子句,按照字段col来排

列自动取值

MySQL:

 

SET @r=0;

SELECT @r:=IFNULL(@r,0)+1 AS rownum,table.* FROM table ORDER BY col DESC;

 

与SQL不同,为循环添加字段,如果查询所有行必须加上表名table.*,若取某个

字段则不需要,col1,col2...

 

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