SQL-ORDER BY 多字段排序(升序、降序)

ORDER BY _column1, _column2; /* _column1升序，_column2升序 */

 

ORDER BY _column1, _column2 DESC ; /* _column1升序，_column2降序 */

 

ORDER BY _column1 DESC , _column2 ; /* _column1降序，_column2升序 */

 

ORDER BY _column1 DESC , _column2 DESC ; /* _column1降序，_column2降序 */