Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

OracleÖУ¬ÓÃÒ»ÌõSqlʵÏÖÈÎÒâµÄÐÐתÁÐÆ´½Ó ¶àÐÐÆ´½Ó

 ±í½á¹¹ºÍÊý¾ÝÈçÏ£¨±íÃûTest£©£º
NO VALUE  NAME
1       a       ²âÊÔ1
1       b       ²âÊÔ2
1       c       ²âÊÔ3
1       d       ²âÊÔ4
2       e       ²âÊÔ5
4       f        ²âÊÔ6
4       g       ²âÊÔ7
SqlÓï¾ä£º
select No,
       ltrim(max(sys_connect_by_path(Value, ';')), ';') as Value,
       ltrim(max(sys_connect_by_path(Name, ';')), ';') as Name
  from (select No,
               Value,
               Name,
               rnFirst,
               lead(rnFirst) over(partition by No order by rnFirst) rnNext
          from (select a.No,
                       a.Value,
                       a.Name,
                       row_number() over(order by a.No, a.Value desc) rnFirst
                  from Test a) tmpTable1) tmpTable2
&n


Ïà¹ØÎĵµ£º

OracleÖеÄNullÖµ½âÎö

         ÓÐÈË×ܽáÁËÊý¾Ý¿âÖÐNullÖµµÄ¸ÅÄ±È½Ï¾«Á¶£¬ÕªÂ¼ÈçÏ£º
NullÊÇÊý¾Ý¿âÖÐÌØÓеÄÊý¾ÝÀàÐÍ£¬µ±Ò»Ìõ¼Ç¼µÄij¸öÁÐΪNull£¬Ôò±íʾÕâ¸öÁеÄÖµÊÇδ֪µÄ¡¢ÊDz»È·¶¨µÄ¡£¼ÈÈ»ÊÇδ֪µÄ£¬¾ÍÓÐÎÞÊýÖֵĿÉÄÜÐÔ¡£Òò´Ë£¬Null²¢²»ÊÇÒ»¸öÈ·¶¨µÄÖµ¡£
ÕâÊÇNullµÄÓÉÀ´¡¢Ò²ÊÇNullµÄ»ù´¡£¬ËùÓк ......

oracle 10g»ù´¡²Ù×÷±í

¡¡¡¡1´´½¨Ð±í
¡¡¡¡1.1´Ó²éѯµ½µÄ±í´´½¨±í
¡¡¡¡create table temp as select stuName,stuNo,stuSex from stuInfo where stuAge>25;
¡¡¡¡1.2´´½¨Ð±í
¡¡¡¡/*ѧÉúÐÅÏ¢±í*/
¡¡¡¡create table stuInfo(
¡¡¡¡stuName varchar2(10) ,
¡¡¡¡stuNo varchar2(10),
¡¡¡¡stuSex varchar2(4),
¡¡¡¡stuAge number(2),
¡¡¡¡st ......

Óà Navicat for Oracle ¹ÜÀí Oracle10g/11g Êý¾Ý¿â

    Navicat for xxx ÊÇÒ»¸öÓÅÐãµÄÊý¾Ý¿â¹ÜÀí¿Í»§¶Ë£¬ÓÐ MySQL¡¢Oracle µÈ°æ±¾¡£½¨Òé´ó¼Ò×îºÃÓà Enterprise °æ±¾£¬¹¦ÄÜÈ«ÃæÒ»Ð©£¬µ«½ÏÖ®ÓÚÃâ·ÑµÄ Lite °æ£¬ÆóÒµ°æ¿ÉÊÇÒª»¨Òø×ÓÂòµÄ¡£
    °²×° Navicat for Oracle ºó£¬Ê×ÏÈÐèÒª½¨Ò»¸ö“Á¬½Ó”£¬×÷Ϊij¸ö¹ÜÀíÈÎÎñµÄ±êʶ£¬ÒòΪ×÷Ϊ¿ ......

SQL Server 2005°²È«ÉèÖÃÖ¸ÄÏ

 ¡¡¡¡×ܵÄÀ´Ëµ£¬MS SQL 2005µÄ°²È«ÐÔ±ÈSQL 2000ҪǿÉϲ»ÉÙ£¬²»¹ýĬÈÏÉèÖû¹ÊÇÓкÍÔ­À´Ò»ÑùµÄ©¶´£¬ÏÂÃæÎÒÃÇÀ´ÐÞ¸ÄÒ»ÏÂĬÈÏÉèÖá£
¡¡¡¡1¡¢ÐÞ¸ÄĬÈÏ£Ó£ÁÃÜÂë¡£
¡¡¡¡°²×°MSSQLʱʹÓûìºÏģʽ£¬µ±È»SAÃÜÂë×îºÃ²»ÄÜΪ¿Õ£¬ÔÚSQL2005ÖУ¬¿ÉÒÔ¶ÔSAÕâ¸ö³¬¼¶Óû§Ãû½øÐÐÐ޸Ļòɾ³ý¡£
use master
ALTER LOGIN [ ......

sqlÓï¾ä

 1. ˵Ã÷£º¸´ÖƱí(Ö»¸´Öƽṹ£¬Ô´±íÃû£ºa£¬Ð±íÃû£ºb)
SQL: select * into b from a where 1<>1;
        2. ˵Ã÷£º¿½±´±í(¿½±´Êý¾Ý£¬Ô´±íÃû£ºa£¬Ä¿±ê±íÃû£ºb)
SQL: insert into b(a, b, c) select d, e, f from b;
        3. ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ