在Kotlin中使用Anko SQLite获取记录计数

dependencies {
    implementation "org.jetbrains.anko:anko-sqlite:$anko_version"
}

import org.jetbrains.anko.db.*

class MyDatabaseOpenHelper(ctx: Context) : AnkoSQLiteOpenHelper(ctx, "MyDatabase", null, 1) {
    override fun onCreate(db: SQLiteDatabase) {
        // 创建表格的SQL语句
        db.createTable("MyTable", true,
            "id" to INTEGER + PRIMARY_KEY + AUTOINCREMENT,
            "name" to TEXT,
            // 其他列...
        )
    }

    override fun onUpgrade(db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {
        // 升级数据库的操作，例如删除旧表格并重新创建新表格
        db.dropTable("MyTable", true)
        onCreate(db)
    }
}

val database = MyDatabaseOpenHelper(context).writableDatabase
val count = database.use {
    select("MyTable").count("id")
        // 可以添加其他查询条件，例如where语句
        // .whereArgs("name = {name}", "name" to "John")
        .exec { parseSingle(IntParser) }
}