zoukankan      html  css  js  c++  java
  • Get Primary Key Column From A Table


    import
    java.sql.Connection; import java.sql.DatabaseMetaData; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; public class Main { public static void main(String[] args) throws Exception { Connection conn = getHSQLConnection(); System.out.println("Got Connection."); Statement st = conn.createStatement(); st.executeUpdate("create table survey (id int,name varchar, PRIMARY KEY (id) );"); st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')"); ResultSet rs = null; DatabaseMetaData meta = conn.getMetaData(); // The Oracle database stores its table names as Upper-Case, // if you pass a table name in lowercase characters, it will not work. // MySQL database does not care if table name is uppercase/lowercase. // rs = meta.getPrimaryKeys(null, null, "survey"); java.util.List list = new java.util.ArrayList(); while (rs.next()) { String columnName = rs.getString("COLUMN_NAME"); System.out.println("getPrimaryKeys(): columnName=" + columnName); } st.close(); conn.close(); } private static Connection getHSQLConnection() throws Exception { Class.forName("org.hsqldb.jdbcDriver"); System.out.println("Driver Loaded."); String url = "jdbc:hsqldb:data/tutorial"; return DriverManager.getConnection(url, "sa", ""); } public static Connection getMySqlConnection() throws Exception { String driver = "org.gjt.mm.mysql.Driver"; String url = "jdbc:mysql://localhost/octopus"; String username = "root"; String password = "root"; Class.forName(driver); // load MySQL driver Connection conn = DriverManager.getConnection(url, username, password); return conn; } public static Connection getOracleConnection() throws Exception { String driver = "oracle.jdbc.driver.OracleDriver"; String url = "jdbc:oracle:thin:@localhost:1521:caspian"; String username = "mp"; String password = "mp2"; Class.forName(driver); // load Oracle driver Connection conn = DriverManager.getConnection(url, username, password); return conn; } }
  • 相关阅读:
    IntelliJ IDEA隐藏不想看到的文件或文件夹
    IntelliJ IDEA更改字体和大小
    Dubbo实践(一)入门示例
    部署Jar包到远程Maven仓库
    Linux网卡别名
    ORACLE NLS_LENGTH_SEMANTICS 参数的用途
    Oracle编辑数据时提示:这些查询结果不可更新,请使用ROWI或者SELECT……FOR UPDATE获得可更新结果
    Notepad++格式化JSON字符串
    Xshell配色为Ubuntu风格
    【剑指offer】判断一个序列是否是二叉搜索树的后序遍历,C++实现
  • 原文地址:https://www.cnblogs.com/hephec/p/4563165.html
Copyright © 2011-2022 走看看