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("-", ""));
     }
 }