如何以有意义的方式对行进行排序?
为了以有意义的方式对行进行排序,我们可以使用 ORDER BY 子句。假设我们想对下表中的行进行排序 −
mysql> Select * from Student; +--------+--------+--------+ | Name | RollNo | Grade | +--------+--------+--------+ | Gaurav | 100 | B.tech | | Aarav | 150 | M.SC | | Aryan | 165 | M.tech | +--------+--------+--------+ 3 rows in set (0.00 sec)
以下查询按“姓名”对表进行排序。
mysql> Select * from student order by name; +--------+--------+--------+ | Name | RollNo | Grade | +--------+--------+--------+ | Aarav | 150 | M.SC | | Aryan | 165 | M.tech | | Gaurav | 100 | B.tech | +--------+--------+--------+ 3 rows in set (0.00 sec)
以下查询按“等级”对表进行排序。
mysql> Select * from student order by Grade; +--------+--------+--------+ | Name | RollNo | Grade | +--------+--------+--------+ | Gaurav | 100 | B.tech | | Aarav | 150 | M.SC | | Aryan | 165 | M.tech | +--------+--------+--------+ 3 rows in set (0.00 sec)
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