1. Concatenating the fields SELECT CONCAT('http://www.abc.com?parentCategoryId=' ,CATEGORY_ID,'&categoryId=', RELATED_CATEGORY_ID ) FROM RELATED_CATEGORY WHERE CATEGORY_ID IN (SELECT CATEGORY_ID FROM CATALOG_TO_CATEGORY WHERE CATALOG_ID = 1 AND ACTIVE_FLAG='Y') 2. ERROR 1148 (42000): The used command is not allowed with this MySQL version . LOAD DATA LOCAL INFILE 'users.txt' INTO TABLE users FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' (userid,fistname); Throws an error something like " ERROR 1148 (42000): The used command is not allowed with this MySQL version ." For me the mysql server was an RDS and I was trying to load data from another ec2 instance. When I google around I got suggestions to restart mysqld as "mysql -u user -p --local-infile menagerie" , which was not possible as it was an RDS service. To get it working I had to add following in /etc/mysq