how to change the default value of a column in mysql code example
Example 1: set default value mysql db
ALTER TABLE mytbl ALTER j SET DEFAULT 1000;
Example 2: altering the column name in MySQL to have a default value
ALTER TABLE table_name ALTER COLUMN column_name SET DEFAULT 'literal';
Example 3: how to remove default in mysql
ALTER TABLE "table_name" ALTER COLUMN "name_column" DROP DEFAULT;