种常复制FROM <left_table>  ON <join_condition>  <join_type>   JOIN <right_table>  WHERE <where_condition>  GROUPBY <group_by_list>  HAVING <having_condition>  SELECT DISTINCT <select_list>  ORDERBY <order_by_condition>  LIMIT   <limit_number>  1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.