CRMQuery methods

• ExecSql(). Executes the SQL statement.
• Next(). Selects the next row or SELECT statement in the query.
• NextRecord(). Moves the specified query to the next record.
• Previous(). Selects the previous row or SELECT statement in the query.
• SelectSql(). Executes SQL statements.
• BeginTrans(). Starts transaction for the following SQL statements.
• CommitTrans(). Commits a transaction initiated by BeginTrans().
• RollbackTrans(). Rolls back a transaction initiated by BeginTrans().