发布网友 发布时间:2022-04-07 21:29
共4个回答
懂视网 时间:2022-04-08 01:50
批量添加20000条数据用时8秒。 try { String url = "jdbc:oracle:thin:@IP:1521:orcl"; // orcl为数据库的SID String user = "oracle"; String password = "oracle"; StringBuffer sql = new StringBuffer(); sql.append("insert into ex_log (EX_LOG_ID,EX_LOG_DATE) values (?,?)"); Class.forName("oracle.jdbc.driver.OracleDriver"); Connection con = (Connection) DriverManager.getConnection(url,user,password); // 关闭事务自动提交 con.setAutoCommit(false); Long startTime = System.currentTimeMillis(); PreparedStatement pst = (PreparedStatement) con.prepareStatement(sql.toString()); for (int i = 0; i < list.size(); i++) { ExLog exLog = (ExLog)list.get(i); pst.setString(1, exLog.getExLogId()); pst.setString(2, exLog.getExLogDate()); // 把一个SQL命令加入命令列表 pst.addBatch(); } // 执行批量更新 pst.executeBatch(); // 语句执行完毕,提交本事务 con.commit(); Long endTime = System.currentTimeMillis(); System.out.println("用时:" + (endTime - startTime)); pst.close(); con.close(); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); }
Connection conn = null; PreparedStatement stmt = null; StringBuffer sql = new StringBuffer(); sql.append("merge into DEEPDATA.WARNING_MES t1 "); sql.append("using (select ? as CUSTOMER_ID,? as added,? as integrated_risk,? as inner_risk,? as industry_risk,? as region_risk from dual) t2 "); sql.append("on (t1.CUSTOMER_ID=t2.CUSTOMER_ID) "); sql.append("when matched then "); sql.append("update set "); sql.append("t1.added = t2.added,t1.integrated_risk = t2.integrated_risk,t1.INNER_RISK = t2.INNER_RISK,t1.industry_risk = t2.industry_risk,t1.region_risk = t2.region_risk "); sql.append("when not matched then "); sql.append("insert (t1.CUSTOMER_ID,t1.added,t1.integrated_risk,t1.INNER_RISK,t1.industry_risk ,t1.region_risk) "); sql.append("values(t2.CUSTOMER_ID,t2.added,t2.integrated_risk,t2.INNER_RISK,t2.industry_risk ,t2.region_risk)"); try { conn = DriverManager.getConnection(url, dbUser, dbPassword); // 关闭自动提交; conn.setAutoCommit(false); stmt = conn.prepareStatement(sql.toString()); Timestamp timestamp = Timestamp.valueOf(GetDate .getTodayDate_FullFormat()); if (result != null && result.size() > 0) { double tmpValue; for (Map<String, Object> map : result) { tmpValue = Double.parseDouble(map.get( ConstValue.IntegratedRisk).toString()); if (specialHandle.contains(map.get("id").toString())) { tmpValue = tmpValue * 1.72; } stmt.setInt(1, Integer.parseInt(map.get("id").toString())); stmt.setTimestamp(2, timestamp); stmt.setDouble(3, tmpValue); stmt.setDouble(4, Double.parseDouble(map.get( ConstValue.InnerRisk).toString())); stmt.setDouble(5, Double.parseDouble(map.get( ConstValue.IndustryRisk).toString())); stmt.setDouble(6, Double.parseDouble(map.get( ConstValue.RegionRisk).toString())); stmt.addBatch(); } stmt.executeBatch(); conn.commit(); } stmt.close(); conn.close(); } catch (SQLException e) { e.printStackTrace(); }
[转载]Oracle批量执行
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热心网友 时间:2022-04-07 22:58
为什么我在cmd窗口中输入sqlplus user/pass为报错热心网友 时间:2022-04-08 00:16
select ......后面 加 ; 就可以执行多个sql了!热心网友 时间:2022-04-08 01:51
。。。一般都是按照你说的那样整的吧。。