如果我们从包含 NULL 值的表中将数据导出到 CSV 文件，MySQL 如何评估？

mysql> Select * from Student_info;
+------+---------+------------+------------+
| id   | Name    | Address    | Subject    |
+------+---------+------------+------------+
| 101  | YashPal | Amritsar   | History    |
| 105  | Gaurav  | Chandigarh | Literature |
| 125  | Raman   | Shimla     | Computers  |
| 130  | Ram     | Jhansi     | Computers  |
| 132  | Shyam   | Chandigarh | Economics  |
| 133  | Mohan   | Delhi      | Computers  |
| 150  | Saurabh | NULL       | Literature |
+------+---------+------------+------------+
7 rows in set (0.00 sec)

mysql> Select * from Student_info INTO OUTFILE 'C:/mysql/bin/mysql-files/student_27.csv' FIELDS TERMINATED BY ',';
Query OK, 7 rows affected (0.02 sec)

101   YashPal   Amritsar     History
105   Gaurav    Chandigarh   Literature
125   Raman     Shimla       Computers
130   Ram       Jhansi       Computers
132   Shyam     Chandigarh   Economics
133   Mohan     Delhi        Computers
150   Saurabh   \N           Literature