UPDATE wp_options SET option_value = replace(option_value, 'http://www.oldurl', 'http://www.newurl') WHERE option_name = 'home' OR option_name = 'siteurl';

UPDATE wp_posts SET guid = replace(guid, 'http://www.oldurl','http://www.newurl');

UPDATE wp_posts SET post_content = replace(post_content, 'http://www.oldurl', 'http://www.newurl');

UPDATE wp_postmeta SET meta_value = replace(meta_value,'http://www.oldurl','http://www.newurl');

mysqldump -u root -p -h host_name_or_ip -P port_number --databases db_name --tables tbl_1 tbl_2 > db_name.sql

//to import table
mysql -u -p host_name_or_ip -P port_number database_name < table_name.sql