Question

I’m developing metro app using Windows 8 release preview and C#(VS 2012) and I downloaded SQLite 3.7.13 from link and successfully integrated with my app using this procedure, By using below code I can create table and insert data

var dbpath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "test.db");
            using (var db = new SQLite.SQLiteConnection(dbpath))
            {
                db.CreateTable<Test>();
                db.RunInTransaction(() =>
                    {
                        for (int i = 0; i < 10; i++)
                        {
                            db.Insert(new Test() { id = i,dept = "CS", Firstname = "First" + i.ToString(), Lastname = "Last" + i.ToString() });
                        }
                    });                
            }

Where Test my inner class

class Test
    {
        [AutoIncrement,PrimaryKey]
        public int id { get; set; }
        public string dept { get; set; }
        public string Firstname { get; set; }
        public string Lastname { get; set; }
        public override string ToString()
        {
            return string.Format("{0},{1}", Lastname, Firstname);
        }
    }

By using below code i can retrieve all the records in Test table

var dbpath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "test.db");
            using (var db = new SQLite.SQLiteConnection(dbpath))
            {   
                var data = db.Table<Test>();                    
            }

So my question is how can we give prepared statements in SQLLite?
For example: if i want to find the count of records of dept “CS” in my table, and
what if i want the records of only dept “CS” from my table
Please help me, Thanks in advance.

Answer 1

You should be able to use Linq statements:

• Count

  var count = db.Table<Test>().Count();

• Filtering

  var data = db.Table<Test>().Where(test => test.dept == “CS”);