Data retrieval: SELECT

The SELECT statement allows you to retrieve information from the database. This section describes how to execute a SELECT statement and how to handle the result set it returns.

To execute a SELECT statement

Declare a ULCommand object, which holds the query.
ULCommand cmd;

Assign a statement to the object.

cmd = conn.CreateCommand();
cmd.Command = "SELECT MyColumn FROM MyTable";

Execute the statement.

Query results can be returned as one of several types of objects. In this example, a ULDataReader object is used. In the following code, the result of the SELECT statement contains a string, which is output to the command prompt.

ULDataReader customerNames = prepStmt.ExecuteReader();
int fc = customerNames.GetFieldCount();
while( customerNames.MoveNext() ) {
  for ( int i = 0; i < fc; i++ ) {
    System.Console.Write(customerNames.GetString( i ) + " " );
  }
  System.Console.WriteLine();
}

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