Statement state=null; try {//1.注册驱动 Class.forName("com.mysql.cj.jdbc.Driver");//2.定义sql String sql="insertintoaccountvalues(null,'王五',3000)";//3.获取Connection对象 conn=DriverManager.getConnection("jdbc:mysql:///db1", "root", "root");//4.获取执行sql的对象Statement state=conn...
Result execuitQuery(String sql) : 执行DQL(select)语句 JDBC练习_insert语句 需求:account表:添加一条数据 java Statement statement =null; Connection connection=null;try{ Class.forName("com.mysql.cj.jdbc.Driver"); String sql= "insert into account values(null,'王五',3000)"; connection= DriverManager...
代码如下: packagecom.hy.action.jdbc;importjava.sql.Connection;importjava.sql.SQLException;importjava.sql.Statement;importjava.text.MessageFormat;importjava.text.SimpleDateFormat;importjava.util.ArrayList;importjava.util.Calendar;importjava.util.Date;importjava.util.List;importorg.apache.log4j.Logger;import...
这里的this.plan就是SingleTableOperation,handler是PolarDB-X的CN与DN间交互的MyJdbcHandler,可以认为是执行物理计划的handler,会根据plan生成真正的物理SQL,下发到DN执行。 由于这条SQL较为简单,CN不需要过多处理,再举一例Insert语句:insert into sbtest(k) values(101),(102); 经过优化器后,该语句的执行计划是...
Sharding-jdbc 4.1.1 & 4.1.0 The sql is very simple: Table t = new Table(); t.setSeq(post.getSeq()); em.persist(t); I also have a lot of other db statement, some with JPA, some just sql statement, they are all ok, but the above sql will cause the following problems: ...
at io.shardingjdbc.core.jdbc.core.statement.ShardingPreparedStatement.route(ShardingPreparedStatement.java:161) at io.shardingjdbc.core.jdbc.core.statement.ShardingPreparedStatement.execute(ShardingPreparedStatement.java:140) at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandle...
ds.setUrl("jdbc:oracle:thin:@192.168.1.4:1521:orcl"); ds.setUsername("dpmanage"); ds.setPassword("dpmanage"); ds.setDriverClassName("oracle.jdbc.driver.OracleDriver"); return ds; } 报错信息 Exception in thread "main" java.lang.RuntimeException: java.sql.SQLFeatureNotSupportedException ...
getConnection( "jdbc:mysql://127.0.0.1:9030/test?rewriteBatchedStatements=true", "root", ""); String sql = "INSERT INTO t_select_test (a, b, c, d) VALUES(?, ?, ?, ?)"; PreparedStatement ps = conn.prepareStatement(sql); for (int i = 0; i < 4; i++) { ps.setString(1,...
getConnection("jdbc:h2:~/test", "sa", ""); // add application code here conn.close(); } } 如果给定地址的数据库并不存在, 同时H2还提供了一个简单的管理界面,使用下面的命令就可以启动H2管理界面: java -jar h2*.jar 默认情况下访问http://localhost:8082就可以访问到管理界面: ...
在JDBC中,Connection通过prepareStatement()方法来创建PreparedStatement对象. prepareStatement()方法有多种重载实现,我们这里主要看下面两种: 方法一: PreparedStatementprepareStatement(Stringsql,intautoGeneratedKeys)throwsSQLException; 方法二: PreparedStatementprepareStatement(Stringsql,StringcolumnNames[])throwsSQLException; ...