code: public SqlBuilder select(final String what) {
      if (null == what) {
        this.select = null;
      } else {
        if (Strings.contains(what.toLowerCase(), "select")) {
          this.select = what;
        } else {
          this.select = "select " + what;
        }
      }
      return this;
    }
docs: <p>
  select.
  </p>
  
  @param what a {@link java.lang.String} object.
  @return a {@link org.beangle.commons.dao.query.builder.SqlBuilder} object.