:
import androidx.room.migration.Migration
import androidx.sqlite.db.SupportSQLiteDatabase
   :
@Database(
  entities = [SiteUrl::class],
  entities = [SiteUrl::class, List01Data::class],
  version = 1,
  version = 2,
  exportSchema = false
)

abstract class AppDatabase : RoomDatabase() {
  abstract fun siteUrlDao(): SiteUrlDao
  abstract fun list01DataDao(): List01DataDao

  companion object {
   :
    /**
     * バージョン1から2へのマイグレーション
     * List01Dataテーブルを追加
     */
    private val MIGRATION_1_2 = object : Migration(1, 2) {
      override fun migrate(database: SupportSQLiteDatabase) {
        // List01Dataテーブルを作成
        database.execSQL("""
          CREATE TABLE IF NOT EXISTS `list01_data` (
            `key` TEXT NOT NULL,
            `occ_date` TEXT NOT NULL,
            `data1` TEXT NOT NULL,
            `data2` TEXT NOT NULL,
            `data3` TEXT NOT NULL,
            PRIMARY KEY(`key`)
          )
        """.trimIndent())
      }
    }

    fun getDatabase(context: Context): AppDatabase {
   :
          .addMigrations(MIGRATION_1_2)
          .build()
   :