mssql,mysql,Oracle 数据库中获得UUID字符串

 sql server : select replace(newId(),'-','')

      oracle :select sys_guid() from dual

SQL> select sys_guid() from dual;
SYS_GUID()
--------------------------------
74CC7FA2ABF7437D9AC29798ACC3E129

SQL> 

      mysql :UUID()

　　JAVA 中获取UUID

import java.util.UUID;

import org.junit.Test;

public class getUUID {
    @Test
    public void getUuid(){
        UUID u = UUID.randomUUID();
        System.out.println(u.toString().replace("-", ""));
    }
}