mysql procedure CONCAT error

Question

I want copy data to table from another table with current month

This sql is ok
SELECT * FROM aqi_hour where DATE_FORMAT( date, '%Y%m' ) = DATE_FORMAT( CURDATE( ) ,'%Y%m' )

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But this is not ok , execute CALL porcedureName() create procedure porcedureName () begin SET @sqlstr = CONCAT(' CREATE TABLE aqi_hour_',DATE_FORMAT(now(),'%Y%m') ,' SELECT * FROM aqi_hour where ', DATE_FORMAT( date, '%Y%m' ) ,'=', DATE_FORMAT( CURDATE( ) , '%Y%m' )); PREPARE stmt1 FROM @sqlstr ; EXECUTE stmt1 ; end create procedure porcedureName () begin SET @sqlstr = CONCAT(' CREATE TABLE aqi_hour_',DATE_FORMAT(now(),'%Y%m') ,' SELECT * FROM aqi_hour where ', DATE_FORMAT( date, '%Y%m' ) ,'=', DATE_FORMAT( CURDATE( ) , '%Y%m' )); PREPARE stmt1 FROM @sqlstr ; EXECUTE stmt1 ; end

Error message : [Err] 1054 - Unknown column 'date' in 'field list'

Thanks!

Answer 1

Try:

SET @`sqlstr` := CONCAT('CREATE TABLE aqi_hour_', DATE_FORMAT(NOW(), '%Y%m'),
                        ' SELECT *
                          FROM aqi_hour
                          WHERE DATE_FORMAT(date, \'%Y%m\') =
                                DATE_FORMAT(CURDATE() , \'%Y%m\')
                        ');