oracl 和db2 常用语法比较： 1、取前N条记录 Oracle：Select * from TableName where rownum <= N; DB2：Select * from TableName fetch first N rows only; 2、取得系统日期 Oracle：Select sysdate from dual; DB2：Select current timestamp from sysibm.sysdummy1; 3、空值转换 Oracle：Select
代码如下:/// 共享锁 public class ShareLock { ReaderWriterLock Lock; IDisposable readLock, writeLock; public IDisposable ReadLock { get { Lock.AcquireReaderLock(-1); return readLock; } } public IDisposable WriteLock { get { Lock.AcquireWriter
