conn.Open(); OleDbCommand cmd = new OleDbCommand("SELECT [Region], SUM([Amount]) FROM [Sheet1$] GROUP BY [Region]", conn); OleDbDataReader reader = cmd.ExecuteReader(); while (reader.Read())
In the sprawling ecosystem of Microsoft data technologies, certain components work so effectively behind the scenes that they often go unnoticed until something breaks. The Microsoft Access Database Engine (formerly known as the Jet Red engine, and later the Access Connectivity Engine or ACE) is precisely such a component. microsoft access database engine
Legacy systems, Windows-only automation, and rapid internal tools that need to query Excel or Access without overhead. OleDbCommand cmd = new OleDbCommand("SELECT [Region]
using (OleDbConnection conn = new OleDbConnection(connString)) SUM([Amount]) FROM [Sheet1$] GROUP BY [Region]"
Console.WriteLine($"reader[0]: reader[1]");