SQL helper query script

db help query .sql

/* fix nodejs app connection mysql */ 
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';
flush privileges;

/*** change database and table character encode ***/
/* for MySQL 5.5.3 abd newer version */
ALTER DATABASE databasename CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ALTER TABLE tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
/* for MySQL 5.5.2 or older which didn't support 4-byte UTF-8 */
ALTER DATABASE databasename CHARACTER SET utf8 COLLATE utf8_unicode_ci;
ALTER TABLE tablename CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci;