小编che*_*tan的帖子

我有更新查询,如

update dedupctntest a set a.city = case when exists(
select b.shortname from DEDUPADDRESSDICT where lower(a.city) =lower(b.shortname) and rownum = 1) b  then
b.fullname else a.city end;

但它会给出missing keyword错误

任何人都能说出错在哪里？

我在桌子上有一个名字chandreshkumar nareshbhai.我想将其更新为chandresh naresh

是否可以在Oracle中使用正则表达式？

我有一个演示应用程序来检查选择更新查询

public class Test implements Runnable{

    public Test() {
    }

    public static void main(String[] args) {
        Thread t1 = new Thread(new Test());
        Thread t2 = new Thread(new Test());

        t1.start();
        t2.start();
    }

    public void run() {
        // TODO Auto-generated method stub
        try{
            String updateWith = "";
            String sel = "SELECT SIDNUMBERTO FROM tblmserialbatchdetail WHERE sidnumberto = ("+
            "SELECT max(sidnumberto) FROM tblmserialbatchdetail WHERE generationmode='A' and nvl(serialprefix,' ') = nvl('',' ') " +
            "and sidlengthwithoutprefix =12) FOR UPDATE";
            //System.out.println("SELECT QUERY ===: "+sel);
            String …

我有这个阿拉伯文:???? ??????.当我尝试将其保存在MySQL数据库中时,它不会保存.

有没有办法将其保存为原始文本？

这是我在客户端套接字上使用的代码

Socket connected = Server.accept();
ObjectOutputStream oos = new ObjectOutputStream(connected.getOutputStream());

oos.writeObject(dPFPSample.serialize());

这是我在服务器套接字上使用的代码

Socket clientSocket = new Socket("localhost", 5002);
ObjectInputStream ois = new ObjectInputStream(clientSocket.getInputStream());

DPFPSample dpfpSample = (DPFPSample) ois.readObject();

我收到了一个错误 java.lang.ClassCastException exception on ois.readObject() line