如何在mysql数据库中更新查询

Question

我正在尝试使用以下代码更新mysql数据库 当我运行程序时，我在控制台

中收到以下错误

---

错误：

You have an error in your SQL syntax; check the manual that corresponds to your MySQL
server version for the right syntax to use near 
'SET AVG_COST = 100000 , RWDS_INCENT = 200 , OTH_EXPENSES = 10000 , 
TRAVELLING_EX' at line 1

代码：

        Class.forName("com.mysql.jdbc.Driver");
        Connection con = DriverManager.getConnection(DB_URL,"root","root");
        System.out.println("Remote DB connection established");
        PreparedStatement statement=con.prepareStatement("UPDATE TBL_MONTHLY_EXPENSES_DETAILS  " +
                "SET AVG_COST = "+AVG_COST+" ," +
                   " RWDS_INCENT = "+RWDS_INCENT +" ,"+
                   " OTH_EXPENSES = "+OTH_EXPENSES+" ,"+
                   " TRAVELLING_EXPENSES = "+TRAVELLING_EXPENSES+" ,"+
                   " CLIENT_VISITS = "+CLIENT_VISITS+" ,"+
                   " REV_RECD = "+REV_RECD+" "
                +" WHERE PJT_CODE = '"+PJT_CODE
                +"' AND PJT_MONTH = '"+PJT_MONTH
                +"' AND PJT_YEAR = '"+PJT_YEAR+"' "
                );
        statement.executeUpdate();

Answer 1

TRAVELLING_EXPENSES可能有问题。检查您要更新的值。