Getting error while executing the mysql query

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Hi Team,

Trying to achive query result into csv file with the below query--

SET @outpath = '/var/lib/mysql-files/';
SET @outfile = date_format(curdate(),'%Y%m%d');
SET @outextension = concat(@outpath,'StepCount_',@outfile,'.csv ');
SET @SQL :=Concat("select 'Participent Name','Email ID','DAY1','DAY2','DAY3','DAY4','DAY5','DAY6','DAY7','DAY8','DAY9','DAY10','DAY11','DAY12','DAY13','DAY14','DAY15','DAY16','DAY17','DAY18','DAY19','DAY20','DAY21','DAY22','DAY23','DAY24','DAY25','DAY26','DAY27','DAY28'
union all
select concat(ifnull(u.First_name,''),' ',ifnull(u.Middle_name,''),' ',ifnull(u.last_Name,'')) Name,u.email AS 'Email ID',ifnull(s.day_4,'') AS Day1,ifnull(s.day_5,'') AS Day2,ifnull(s.day_6,'') AS Day3,ifnull(s.day_7,'') AS Day4,ifnull(s.day_8,'') AS Day5,ifnull(s.day_9,'') AS Day6,ifnull(s.day_10,'') AS Day7,ifnull(s.day_11,'') AS Day8,ifnull(s.day_12,'') AS Day9,ifnull(s.day_13,'') AS Day10,ifnull(s.day_14,'') AS Day11,ifnull(s.day_15,'') AS Day12,ifnull(s.day_16,'') AS Day13,ifnull(s.day_17,'') AS Day14,ifnull(s.day_18,'') AS Day15,ifnull(s.day_19,'') AS Day16,ifnull(s.day_20,'') AS Day17,ifnull(s.day_21,'') AS Day18,ifnull(s.day_22,'') AS Day19,ifnull(s.day_23,'') AS Day20,ifnull(s.day_24,'') AS Day21,ifnull(s.day_25,'') AS Day22,ifnull(s.day_26,'') AS Day23,ifnull(s.day_27,'') AS Day24,ifnull(s.day_28,'') AS Day25,ifnull(s.day_29,'') AS Day26,ifnull(s.day_30,'') AS Day27,ifnull(s.day_31,'') AS Day28  from users u Left join step s on u.id=s.fk_user_id  ",CHAR(39),@outextension,CHAR(39)) ;
PREPARE stmt FROM @SQL;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

but getting below error --

Quote:
Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''/var/lib/mysql-files/StepCount_20220117.csv '' at line 3

What I have tried:

Quote:
Remove the double commas , insert space between users and file name etc

but still getting same error.

Posted 16-Jan-22 23:05pm

him_mca

Updated 16-Jan-22 23:33pm

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Richard Deeming · Accepted Answer · 2022-01-16T23:33:00

Take a look at your final query:

SQL

SELECT ...
UNION ALL SELECT ...
'/var/lib/mysql-files/StepCount_20220117.csv'

That last line is not a valid MySql command. Assuming you want to write the query results to a file, you're missing the INTO OUTFILE clause:
MySQL :: MySQL 8.0 Reference Manual :: 13.2.10.1 SELECT ... INTO Statement[^]

SQL

SET @SQL :=Concat("select ...", " INTO OUTFILE ", CHAR(39), @outextension, CHAR(39));