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/* Formatted on 2009/12/02 16:01 (Formatter Plus v4.8.8) */
SELECT TO_CHAR (TO_DATE ('2009-12-02', 'YYYY-MM-DD'), 'WW')
  from DUAL;
²»¹ýto_char()º¯ÊýÔÚ¼ÆËãÒ»ÄêÖеڼ¸ÖÜÊÇ´Ó¸ÃÄêµÄ1ÔÂ1ÈÕ¿ªÊ¼µÄ¡£
 
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/* Formatted on 2009/12/02 15:31 (Formatter Plus v4.8.8) */
SELECT TO_CHAR
          (DECODE
              (SIGN
                  (  (  TO_DATE ('2009-12-02', 'YYYY-MM-DD')
                      + TO_NUMBER
                              (DECODE (TO_CHAR (TRUNC (TO_DATE ('2009-12-02',
                                                                'YYYY-MM-DD'
                                                               ),
                                &nb


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oracle¸´Ï°£¨Ò»£© Ö®OracleÌåϵ½á¹¹

      ѧϰOracle DBAÒ²°ë¸ö¶àѧÆÚÁË£¬½ñÌìÃÍÈ»²Å·¢ÏÖ£¬Ô­À´ÎÒµÄÊ黹ÊǺÜеģ¬ÉϿβÙ×÷ʱºòÒ²Ö»ÊÇÖªµÀ´ó¸ÅÔõô×ö£¬µ«ÊÇÒªÕæµÄÈ«²¿×Ô¼º×ö£¬¶ø²»È¥·­Ê黹ÊÇÓÐÒ»¶¨µÄÄѶȵģ¬ËùÒÔÄØ£¬½ñÌ쿪ʼ½«DBA´ÓÍ·¸´Ï°Ò»±é£¬Í¬Ê±ÔÙ²Ù×÷Ò»±é¡£
      µÚÒ»Õ£¬Ñ§µÄÊÇOracleµÄÌåϵ½á¹¹£ ......

OracleÊý¾Ý¿â»¹Õæ²»ºÃÕû

´ÓÔÚLinuxÉÏ°²×°Oracleµ½Í¶ÈëʹÓòż¸Ì죬Åöµ½µÄÎÊÌâ¾Í³É°ÙÉÏǧµÄ¡£ÔÚʹÓÿͻ§¶ËÁ¬½ÓÔ¶³ÌOracleÊý¾Ý¿â·þÎñÆ÷ʱ£¬³öÏÖÁËlistener refused the connection with the following error ora-12519 Listener refused the connection with the following error:ORA-12519, TNS:no appropriate service handler foundThe Connection ......

oracle union

select t.lot_number
from inv.mtl_onhand_quantities_detail t
left join mtl_system_items_b mi
on t.inventory_item_id = mi.inventory_item_id
where mi.segment1 like '101%' and mi.organization_id = 102
group by t.lot_number having count(*)=1 union
select t.lot_number||'x'
......

ORACLE WITH AS Ó÷¨

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