Question

I have inserted a lot of information into a SQlite database from my program. Now, my small task is to look up the database and find some statistics from it.

Ex: I have a database with three fields – Timestamp, Message and Key
Now, I want to check the database in the Message column and count the number of times a certain keyword(say “ERROR”) occurs in the database.

What is the simplest way to do this?
SELECT Message from Database and how do i add the filter???

I use Regex to filter out some stuff before Insert. Should i do something similar here?

Thanks

Edit:

I used the solution mentioned below SELECT count(*) but am still unaware of how to get the value out to use it in another function. I have shown the code i used below. I am new to SQL and it possibly is wrong. Please help!

public void selectFromDatabase()
    {
        String cntnStr_query = "data source=C:\\TMU_Files\\test31.s3db";
        SQLiteConnection connection_query = new SQLiteConnection(cntnStr_query);
        connection_query.Open();
        SQLiteCommand cmd_query = connection_query.CreateCommand();
        cmd_query.CommandText = "SELECT count(*) from LogDatabase where LogMessage like '%ERR%'";
        SQLiteDataAdapter da_query = new SQLiteDataAdapter(cmd_query);
        DataSet ds_query = new DataSet();
        //MessageBox.Show(cmd_query.ExecuteNonQuery().ToString());
        //MessageBox.Show(count.ToString());
        try
        {
            da_query.Fill(ds_query);
            DataTable dt_query = ds_query.Tables[0];
        }
        catch (Exception e)
        {
            MessageBox.Show(e.ToString());
        }
        finally
        {
            cmd_query.Dispose();
            connection_query.Close();
        }
        //cmd_query.Dispose();
        //connection_query.Close();

    }
}

}

Answer 1

select count(*) from database where message like '%error%'

As to how it should look like in code, try something like this:

using(var sda=new SQLiteDataAdapter(
  "SELECT count(*) from LogDatabase where LogMessage like '%ERR%'",
  "data source=C:\\TMU_Files\\test31.s3db")
{
  var dt=new DataTable();
  sda.Fill(dt);
  return dt;
}