public virtual void Visited(SqlDeleteClause deleteClause)
 {
 }
 public virtual void Visiting(SqlDeleteClause deleteClause)
 {
     sqlBuilder.Append("Delete");
 }
 private void SetupClauses()
 {
     this.sqlDeleteClause = new SqlDeleteClause(this);
     this.sqlFromClause = new SqlFromClause(this);
     this.sqlWhereClause = new SqlWhereClause(this);
 }