src/database/migrations/2016_07_04_000060_create_geonames_iso_language_codes_table.php
public function up()
    {
        Schema::create('geonames_iso_language_codes', function (Blueprint $table) {
            $table->char('iso_639_3',3)->primary();
            $table->char('iso_639_2',3)->unique()->nullable();
            $table->char('iso_639_1',2)->unique()->nullable();
            $table->string('language_name', 200);
        });
    }
public function up()
    {
        Schema::create('geonames_iso_language_codes', function (Blueprint $table) {
            $table->char('iso_639_3',3)->primary();
            $table->char('iso_639_2',3)->unique()->nullable();
            $table->char('iso_639_1',2)->unique()->nullable();
            $table->string('language_name', 200);
        });
    }
Run the migrations.

@return void