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法学如何使用另一张表在 JDBC 中创建一张表？
可以使用以下语法创建一个与现有表相同的表
CREATE TABLE new_table as SELECT * from old_table;
假设我们有一个名为 dispatches 的表，其中包含 5 条记录，如下所示
+-------------+--------------+--------------+--------------+-------+----------------+ | ProductName | CustomerName | DispatchDate | DeliveryTime | Price | Location | +-------------+--------------+--------------+--------------+-------+----------------+ | Key-Board | Raja | 2019-09-01 | 05:30:00 | 7000 | Hyderabad | | Earphones | Roja | 2019-05-01 | 05:30:00 | 2000 | Vishakhapatnam | | Mouse | Puja | 2019-03-01 | 05:29:59 | 3000 | Vijayawada | | Mobile | Vanaja | 2019-03-01 | 04:40:52 | 9000 | Chennai | | Headset | Jalaja | 2019-04-06 | 18:38:59 | 6000 | Goa | +-------------+--------------+--------------+--------------+-------+----------------+
以下 JDBC 程序与数据库建立连接，并使用现有表的定义创建一张新表。
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class CreateTable {
public static void main(String args[]) throws Exception{
//Registering the Driver
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//Getting the connection
String mysqlUrl = "jdbc:mysql:///mydatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established......");
//Creating the Statement object
Statement stmt = con.createStatement();
//Query to create a table
String query = "CREATE TABLE Sales as SELECT * from dispatches";
//Executing the query
stmt.execute(query);
System.out.println("Table created......");
}
}输出
Connection established...... Table created......
如果您验证 Sales 表的内容，您可以观察到它与 dispatches 表创建相同。
mysql> select * from Sales; +-------------+--------------+--------------+--------------+-------+----------------+ | ProductName | CustomerName | DispatchDate | DeliveryTime | Price | Location | +-------------+--------------+--------------+--------------+-------+----------------+ | Key-Board | Raja | 2019-09-01 | 05:30:00 | 7000 | Hyderabad | | Earphones | Roja | 2019-05-01 | 05:30:00 | 2000 | Vishakhapatnam | | Mouse | Puja | 2019-03-01 | 05:29:59 | 3000 | Vijayawada | | Mobile | Vanaja | 2019-03-01 | 04:40:52 | 9000 | Chennai | | Headset | Jalaja | 2019-04-06 | 18:38:59 | 6000 | Goa | +-------------+--------------+--------------+--------------+-------+----------------+ 5 rows in set (0.00 sec)
更新于： 30-Jul-2019
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