declare c int
set c = 1
while c<700 do
update users set profile_display_name = concat(substring(first_name,1,1), last_name)
where profile_display_name is null and id between ((c-1)*10000+1) and (c*10000);
SET c = c+1;
End while ;
I am getting error. near declare and end while statement. Where am I making mistake??
This Works much better for me
DELIMITER $$
CREATE DEFINER=`ops`@`localhost` PROCEDURE `myproc`()
BEGIN
DECLARE c INT;
SET c = 1;
WHILE c < 700 DO
SELECT CONCAT('Loop #:', c) ;
update users
set profile_display_name = concat(substring(first_name,1,1), last_name)
where (profile_display_name is null or profile_display_name = '')
and id between ((c-1)*10000+1) and (c*10000);
commit;
SET c=c+1;
END WHILE;
END
Here's how it would be defined as a stored procedure:
DELIMITER $$
CREATE PROCEDURE proc_name()
BEGIN
DECLARE c int ; --- added ;
SET c = 1 ; --- added ;
WHILE c<700 DO
UPDATE users
SET profile_display_name = concat(substring(first_name,1,1), last_name)
WHERE profile_display_name IS NULL
AND id BETWEEN ((c-1)*10000+1) AND (c*10000);
SET c = c + 1 ;
END WHILE ;
END $$
DELIMITER ;
In MySQL compound statements and flow control structures can only be used in stored routines - MySQL Compound-Statement Syntax
;after each statement:declare c int; set c=1;