mysql obtains self-increasing serial number when querying

Others 2020-10-30 13:06:27 views: null

SELECT  (@i:=@i+1),A.asset_code FROM (SELECT @i:=0) as i,leo_strategic_indicators  A  order by A.score DESC ;

Take (select @i:0) as a derived table
and add one to the calculation loop through the previous @i:=@i+1 to get the self-increasing serial number

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Origin blog.csdn.net/qq_37823979/article/details/107355215

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