如何使用Java删除MySQL表？

Z时代
2024-01-10
分类：综合

让我们首先在数据库中创建一个表。创建表的查询如下

create table customerDetails
   -> (
   -> CustomerId int,
   -> CustomerName varchar(30)
   -> );

现在显示数据库中的所有表，以检查customerDetails表是否存在。

查询如下

show tables;

以下是输出

+------------------------------+
| Tables_in_test3              |
+------------------------------+
| bestdateformatdemo           |
| customerdetails              |
| deletedemo                   |
| differentdatetime            |
| expandedoutputdemo           |
| fieldlessthan5chars          |
| lastrecordbeforelastone      |
| mostrecentdatedemo           |
| nullcasedemo                 |
| order                        |
| orderbydatethentimedemo      |
| posts                        |
| productdemo                  |
| radiansdemo                  |
| selecttextafterlastslashdemo |
| siglequotesdemo              |
| studentinformation           |
| updatestringdemo             |
+------------------------------+
18 rows in set (0.00 sec)

看一下示例输出，我们有“ customerdetails”表。

这是要删除的Java代码表。我们的数据库是test3

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
public class DropTableDemo {
   public static void main(String[] args) {
      Connection con = null;
      PreparedStatement ps = null;
      try {
         con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test3?useSSL=false", "root", "123456");
         ps = con.prepareStatement(
         String.format("DROP TABLE IF EXISTS %s", "customerdetails"));
         boolean result = ps.execute();
      } catch (Exception e) {
         e.printStackTrace();
      }
   }
}

现在查看数据库test3，检查表'customerDetails'是否存在，因为我们已经在上面删除了它。

查询如下

show tables;

以下是输出

+------------------------------+
| Tables_in_test3              |
+------------------------------+
| bestdateformatdemo           |
| deletedemo                   |
| differentdatetime            |
| expandedoutputdemo           |
| fieldlessthan5chars          |
| lastrecordbeforelastone      |
| mostrecentdatedemo           |
| nullcasedemo                 |
| order                        |
| orderbydatethentimedemo      |
| posts                        |
| productdemo                  |
| radiansdemo                  |
| selecttextafterlastslashdemo |
| siglequotesdemo              |
| studentinformation           |
| updatestringdemo             |
+------------------------------+
17 rows in set (0.00 sec)