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   ÔÚÒ»°ãSelectÓï¾äÖÐÎÒÃÇͨ¹ýOrder by ...Asc/DescÀ´½øÐÐÅÅÐò¡£µ«ÊÇÕâÖÖÅÅÐò·½Ê½ÔÚÊä³öʱ£¬²»°üº¬ÅÅÐòºóµÄÐòºÅÐÅÏ¢¡£
   ÏÖÔÚ½éÉÜÒ»ÏÂOracleÖпÉÒÔÓÃÓÚÅÅÐòÊä³öµÄ·½·¨¡£
   1. RANK ( ) OVER ( [query_partition_clause] order_by_clause )
   RANK ( ) OVER ( [query_partition_clause] order_by_clause )ÖÐ[query_partition_clause]±íʾOracleÖзÖ×é·½·¨£¬Í¨³£Óï¾ä¸ñʽΪ£ºpartition by ÁÐÃû1[,ÁÐÃû2...] 
   order_by_clause ±íʾÅÅÐòµÄÒÀ¾Ý£¬Í¨³£Óï¾ä¸ñʽΪOrder by ÁÐÃû1[,ÁÐÃû2...]¡£ÕâÓëSelectÓï¾äÖÐOrder by Óï¾äÏàͬ¡£Ò»Ñù¿ÉÒÔÔÚÁÐÃûºóÌí¼ÓAsc£¨Ä¬ÈÏ£©»òDesc½øÐÐÉýÐòºÍ½µÐòµÄÑ¡Ôñ¡£
   ²ÉÓÃRANK ( ) OVER ( [query_partition_clause] order_by_clause )ºóÐòºÅµÄ¸ñʽÈçÏÂÀý:1,2,2,4,5,5,5,8,9,10...
   RANK ( ) OVER ( [query_partition_clause] order_by_clause )¶ÔÓÚ²éѯ³öÓï¾äÒ²»á½øÐÐ×Ô¶¯ÅÅÐò¡£
  
   Àý£º±íScoreTbÊý¾ÝÈçÏÂ
   GroupID                   PLAYNAME                  SCORE
    ----------  ------------------ -------------------- ----------
         01                           a1                          100
         01                           a2                          100
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Oracle DropÃüÁî

--ɾ³ý¿ÕµÄ±í¿Õ¼ä£¬µ«ÊDz»°üº¬ÎïÀíÎļþ
drop tablespace tablespace_name;
--ɾ³ý·Ç¿Õ±í¿Õ¼ä£¬µ«ÊDz»°üº¬ÎïÀíÎļþ
drop tablespace tablespace_name including contents;
--ɾ³ý¿Õ±í¿Õ¼ä£¬°üº¬ÎïÀíÎļþ
drop tablespace tablespace_name including datafiles;
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drop tablespace table ......

Oracle ¿ìÕÕ¼° dblinkʹÓà £¨Á½Ì¨·þÎñÆ÷Êý¾Ýͬ²½£©


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--          Ä¿µÄ——Ҫͬ²½µ½µÄÊý¾Ý¿â
/*Ò»¡¢´´½¨dblink£º*/
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drop database link dblink_anson;
Create public
database link dblink_an ......

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