mysql change default value for column code example
Example 1: mysql how to change default charset
ALTER DATABASE databasename CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ALTER TABLE tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
Example 2: altering the column name in MySQL to have a default value
ALTER TABLE table_name ALTER COLUMN column_name SET DEFAULT 'literal';