從java中的訪問表中獲取所有約束的名稱

Question

如何獲取所有約束，如在MS Access數據庫中定義的主鍵和外鍵。 對於MySql，我們使用describe table_name

同樣，在java程序中使用它的MS Access的查詢是什麼？

Answer 1

import java.sql.*; 
public class DescQueryOutput{ 

    public static void main(String args[]) 
    { 
     try 
     { 
      Class.forName("com.mysql.jdbc.Driver"); 
      Connection con = DriverManager.getConnection ("jdbc:mysql://localhost:3306/test","root","root"); 
      Statement stmt = con.createStatement(); 
      String query = "DESC newaccount"; 

      ResultSet rs = stmt.executeQuery(query); 
      System.out.println("COLUMN NAME\tDATATYPE\tNULL\tKEY\tDEFAULT\tEXTRA"); 
    while (rs.next()) 
    { 
     System.out.print(rs.getString(1)+"\t"); 
     System.out.print(rs.getString(2)+"\t"); 
     System.out.print(rs.getString(3)+"\t"); 
     System.out.print(rs.getString(4)+"\t"); 
     System.out.print(rs.getString(5)+"\t"); 
     System.out.println(rs.getString(6)); 
    } 
     } 

     catch (SQLException e) { 
      e.printStackTrace(); 
     } catch (ClassNotFoundException e) { 
      e.printStackTrace(); 
     } 

     finally { 
     } 
    } 
}