日日操夜夜添-日日操影院-日日草夜夜操-日日干干-精品一区二区三区波多野结衣-精品一区二区三区高清免费不卡

SELECT 命令可用于從 MySQL 表中獲取一列或多列作為輸出。下面給出了一個

示例來獲取一列或多列

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)

登錄后復(fù)制

上面的查詢從“學(xué)生”表中獲取兩列“姓名”和“主題”。

mysql> Select Address from Student;

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

4 rows in set (0.00 sec)

登錄后復(fù)制

上面的查詢僅從“學(xué)生”表中獲取一列“地址”。

以上就是我們?nèi)绾螐?MySQL 表中獲取一列或多列作為輸出？的詳細內(nèi)容，更多請關(guān)注www.92cms.cn其它相關(guān)文章！