https://blog.youkuaiyun.com/friday5pmzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/friday5pm/article/details/1641978https://blog.youkuaiyun.com/friday5pm/article/details/1641978friday5pmThu, 07 Jun 2007 11:15:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1641971https://blog.youkuaiyun.com/friday5pm/article/details/1641971friday5pmThu, 07 Jun 2007 11:11:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1606019https://blog.youkuaiyun.com/friday5pm/article/details/1606019friday5pmSat, 12 May 2007 16:11:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1592632https://blog.youkuaiyun.com/friday5pm/article/details/1592632friday5pmMon, 30 Apr 2007 10:10:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1553800https://blog.youkuaiyun.com/friday5pm/article/details/1553800friday5pmFri, 06 Apr 2007 10:06:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1544105https://blog.youkuaiyun.com/friday5pm/article/details/1544105friday5pmWed, 28 Mar 2007 15:44:00 +0800 Int32 是一个装箱的过程，反之则是拆箱的过程。许多其它变量类型也是如此，如：short Int16，long Int64 等。对于一般的程序员来说，大可不必去了解这一过程，因为这些装箱和拆箱的动作都是可以自动完成的，不需要写代码进行干预。但是我们需要记住这些类型之间的关系，所以，我们使用“别名”来记忆它们之间的关]]>https://blog.youkuaiyun.com/friday5pm/article/details/1544089https://blog.youkuaiyun.com/friday5pm/article/details/1544089friday5pmWed, 28 Mar 2007 15:39:00 +0800 select to_char(sysdate,YYYYMMDD W HH24:MI:SS) from dual; TO_CHAR(SYSDATE,YY ------------------- 20030327 4 18:16:09 SQL> select to_char(sysdate,W) from dual; T - 4 №2:取得当]]>https://blog.youkuaiyun.com/friday5pm/article/details/1538422https://blog.youkuaiyun.com/friday5pm/article/details/1538422friday5pmFri, 23 Mar 2007 11:01:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1538385https://blog.youkuaiyun.com/friday5pm/article/details/1538385friday5pmFri, 23 Mar 2007 10:36:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1538356https://blog.youkuaiyun.com/friday5pm/article/details/1538356friday5pmFri, 23 Mar 2007 10:25:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1532226https://blog.youkuaiyun.com/friday5pm/article/details/1532226friday5pmSat, 17 Mar 2007 17:44:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1532212https://blog.youkuaiyun.com/friday5pm/article/details/1532212friday5pmSat, 17 Mar 2007 17:29:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1523859https://blog.youkuaiyun.com/friday5pm/article/details/1523859friday5pmThu, 08 Mar 2007 09:43:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1521839https://blog.youkuaiyun.com/friday5pm/article/details/1521839friday5pmTue, 06 Mar 2007 10:01:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1474787https://blog.youkuaiyun.com/friday5pm/article/details/1474787friday5pmFri, 05 Jan 2007 15:00:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1471171https://blog.youkuaiyun.com/friday5pm/article/details/1471171friday5pmSun, 31 Dec 2006 15:19:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1464603https://blog.youkuaiyun.com/friday5pm/article/details/1464603friday5pmWed, 27 Dec 2006 16:04:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1417036https://blog.youkuaiyun.com/friday5pm/article/details/1417036friday5pmMon, 27 Nov 2006 16:38:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1408258https://blog.youkuaiyun.com/friday5pm/article/details/1408258friday5pmThu, 23 Nov 2006 12:57:00 +0800https://blog.youkuaiyun.com/friday5pm/article/details/1404966https://blog.youkuaiyun.com/friday5pm/article/details/1404966friday5pmWed, 22 Nov 2006 17:10:00 +0800