ORACLEÖиø±í¡¢ÁÐÔö¼Ó×¢ÊÍÒÔ¼°¶ÁȡעÊÍ
ÔÚORACLEÖиø±í¡¢ÁÐÔö¼Ó×¢ÊÍÒÔ¼°¶ÁȡעÊÍ
1¡¢¸ø±íÌî¼Ó×¢ÊÍ£ºSQL>comment on table ±íÃû is '±í×¢ÊÍ";
2¡¢¸øÁмÓ×¢ÊÍ£ºSQL>comment on column ±í.ÁÐ is 'ÁÐ×¢ÊÍ';
3¡¢¶ÁÈ¡±í×¢ÊÍ£ºSQL>select * from user_tab_comments where comments is not null;
4¡¢¶ÁÈ¡ÁÐ×¢ÊÍ£ºSQL>select * from user_col_commnents where comments is not null and table_name='±íÃû';
¸½±íUSER_TAB_COMMENTSºÍuser_col_commentsµÄ½á¹¹£º
1¡¢user_tab_commentsÓÉtable_name¡¢table_typeºÍcommentsÈý²¿·Ö×é³É¡£
2¡¢user_col_commentsÓÉtable_name¡¢column_nameºÍcommentsÈý²¿·Ö×é³É¡£
3¡¢ÔÚSQL*PLUSÖÐÏÔʾ±í½á¹¹£ºdesc ±íÃû;
±¾ÎÄÀ´×ÔCSDN²©¿Í£¬×ªÔØÇë±êÃ÷³ö´¦£ºhttp://blog.csdn.net/wsw002/archive/2005/11/14/529186.aspx
Ïà¹ØÎĵµ£º
ÎÊÌâÒ»£ºÈç±£¼ÓÔØJDBCÇý¶¯³ÌÐò£º
Õý³£ÎÒÃǼÓÔØÇý¶¯³ÌÐòÓÐÈý¸ö;¾¶£º
1.Class.forName(String)ÕâÏëµ±ÓÚclassLoaderÒ»¸öStringÖ¸¶¨µÄÀ࣬ÔÚ×°ÔØÊ±°Ñ¸ÃÇý¶¯³ÌÐòµÄ¾²Ì¬ÄÚÈݶ¼³õʼ»¯£¬ÆäʵÕâʱÇý¶¯³ÌÐòÀàµ÷ÓÃÁËDriverManager.registerDriver(driver)·½·¨¡£
2.ʹÓÃϵͳÊôÐÔ£ºSystem.getPro ......
¡¾51CTO.com¶À¼ÒÌØ¸å¡¿Ãæ¶Ô¾ª»ÅµÄ¿Í»§ºÍ¹ã·ºÖÊÒɵÄýÌ壬Oracle¹Ù·½×î½üÖÕÓÚ³ö°ñ°²Ãñ£¬ÄDZãÊÇÒ»¸öÒÔ“SUN CUSTOMERS ,Oracle Plans To£º”Ϊ´ó±êÌâµÄ¹ã¸æ¡£Ö±Òë¹ýÀ´±ã¹ýÀ´¿ÉÖªµÀ£¬Oracle½«Òª¼Ó´óSPARCºÍSolarisµÄͶÈëÁË£¬¶ø´óÀϰ尣ÀïÉÒ²ÏòIBMÓ²¼þÏÂÁËÕ½Ê飬Éù³ÆOracle½«×îÖÕÓ®µÃÕⳡ¾ºÕù……
&n ......
ÓкܶàÓ¦ÓÃÏîÄ¿, ¸ÕÆð²½µÄʱºòÓÃMYSQLÊý¾Ý¿â»ù±¾ÉÏÄÜʵÏÖ¸÷ÖÖ¹¦ÄÜÐèÇó£¬Ëæ×ÅÓ¦ÓÃÓû§µÄÔö¶à£¬Êý¾ÝÁ¿µÄÔö¼Ó£¬MYSQL½¥½¥µØ³öÏÖ²»¿°ÖظºµÄÇé¿ö£º
Á¬½ÓºÜÂýÉõÖÁå´»ú£¬ÓÚÊǾÍÓаÑÊý¾Ý´ÓMYSQLǨµ½ORACLEµÄÐèÇó£¬Ó¦ÓóÌÐòÒ²ÒªÏàÓ¦×öһЩÐ޸ġ£±¾ÈË×ܽá³öÒÔϼ¸µã×¢ÒâÊÂÏϣÍû¶Ô´ó¼ÒÓÐËù°ïÖú¡£
1£® ×Ô¶¯Ôö³¤µÄÊý¾ÝÀàÐ ......
Oracle±Ê¼Ç
l ¹ØÓÚTRUNCº¯Êý
SELECT
RELATED_ID ,
DOC_ID ,
CAT_ID ,
CAT_CODE ,
RELEASE_DATE ,
&n ......
Ö»ÊÇsqlserver ÌṩµÄÔ¶³ÌÊý¾Ý·ÃÎʺ¯Êý; ÔÚ±¾µØsqlserver ÖÐÈ¡ÍⲿÊý¾ÝÔ´Êý¾Ýʱºò¿ÉÓÃ;
¶ÔÁ¬½Ó±¾µØ oracle ²Ù×÷Ô¶³Ì oracle ²»ÄÜʹÓÃ; ²âÊÔ: pl/sql ÖÐʹÓÃ:
select * from openrowset(................); ÎÞЧ!!!!!!!!!!!!!!
ÔÚoracle ÖÐÐèÒª·ÃÎÊÔ¶³ÌÊý¾Ý,ÐèÒª½¨Á¢Ò»Á¬½ÓÔ¶³Ìoracle µÄ dblink ;
ÔÙÓÃÈçÏ·½ ......