MySQL 如何从MySQL表中获取一个或多个列作为输出?

可以使用SELECT命令从MySQL表中获取一个或多个列作为输出。以下是一个示例，用于获取一个或多个列。

mysql> select * from Student;

+------+---------+---------+-----------+
| Id   | Name    | Address | Subject   |
+------+---------+---------+-----------+
| 1    | Gaurav  | Delhi   | Computers |
| 2    | Aarav   | Mumbai  | History   |
| 15   | Harshit | Delhi   | Commerce  |
| 17   | Raman   | Shimla  | Computers |
+------+---------+---------+-----------+

4 rows in set (0.01 sec)

mysql> select Name, Subject from Student;

+---------+-----------+
| Name    | Subject   |
+---------+-----------+
| Gaurav  | Computers |
| Aarav   | History   |
| Harshit | Commerce  |
| Raman   | Computers |
+---------+-----------+

4 rows in set (0.00 sec)

上面的查询从“Student”表中获取了两个列’Name’和’subject’。

mysql> select Address from Student;

+---------+
| Address |
+---------+
| Delhi   |
| Mumbai  |
| Delhi   |
| Shimla  |
+---------+

4 rows in set (0.00 sec)

上面的查询从’Student’表中仅获取一个列’Address’。

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