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

sql È¡·´

 update anketo1 set fb = substring('10',fb+1,1) WHERE id =5
ºóÀ´ÎÊÁËBM,BM˵ֱ½ÓÈ¡·´
update anketo1 set fb = ~ fb WHERE id =5
ÎÒ¸æËßÁËBMÓÃsubstringÒ²¿ÉÒÔ.
BM˵:"Õâ¼Ò»ïÀ÷º¦£¬ÕâÒ²ÄÜÏë³ö,ÕâÊôÓÚаÃÅÎ书."
×îºóÓÖÏëµ½ÓÃABSÈ¡¾ø¶ÔÖµÒ²¿ÉÒÔ
update anketo1 set fb = abs(fb-1)
ÎÒ¾õµÃ²»¹ÜÊÇʲôÎ书,ÄÜÖÆÊ¤¾ÍÊǺõÄÎ书.
ÒÔÉÏÈýÖÖ·½·¨¶¼ÊDz»´íµÄ·½·¨.


Ïà¹ØÎĵµ£º

SQLºÍORACLEº¯Êý±È½Ï

 
SQLServerºÍOracleÊÇ´ó¼Ò¾­³£Óõ½µÄÊý¾Ý¿â£¬Ôڴ˸Ðл×÷Õß×ܽá³öÕâЩ³£Óú¯ÊýÒÔ¹©´ó¼Ò²Î¿¼¡£
Êýѧº¯Êý£º
¡¡1.¾ø¶ÔÖµ
¡¡¡¡ S:SELECT abs(-1) value
¡¡¡¡ O:SELECT abs(-1) value from dual
2.È¡Õû(´ó)
¡¡¡¡ S:SELECT ceiling(-1.001) value
¡¡¡¡ O:SELECT ceil(-1.001) value from dual
3.È¡Õû£¨Ð¡£© ......

pl/sqlÀûÓÃrownumÈ¡µÃÅÅÐòºóµÄ²¿·ÖÐÐÐòÁÐ

ÎÒÃÇʹÓÃoracleµÄÈ˶¼ÖªµÀ¿ÉÒÔͨ¹ýrownumαÁеõ½²éѯ½á¹ûÐòÁÐÇ°ÃæµÄÖ¸¶¨µÄÐУ¬ÎªÁËÏÂÃæ¸üºÃµÄ½øÐÐ˵Ã÷ÎÊÌ⣬ÎÒÃÇÏÈÀ´´´½¨Ò»¸öÊý¾Ý±ítable1£º
create table table1
(AAA integer primary key,
BBB varchar(30));
È»ºóÔÚtable1ÖвåÈë9ÌõÊý¾Ý£º
insert into table1 values (8, 'good');
insert into table1 values (7 ......

Oracle:pl/sql Òì³£´¦Àí[ת]


pl/sql ÌṩÁËÇ¿´ó¶øÁé»îµÄÊÖ¶ÎÀ´²¶×½ºÍ´¦Àí³ÌÐò²úÉúµÄÒì³££¬´Ó¶øÊ¹ oracle µÄÓû§Ô¶ÀëһЩÁîÈË·³ÄÕµÄ bug ¡£
 
pl/sql Òì³£´¦ÀíµÄ¸ÅÄîºÍÊõÓï
 
ÔÚ oracle ÖÐËùÓеĴíÎó¶¼±»ÈÏΪÊDz»Ó¦¸Ã·¢ÉúµÄÒì³£¡£Ò»¸öÒì³£¿ÉÄÜÊÇÒÔÏ 3 ÖÖÇé¿öµÄÒ»ÖÖ£º
u       ÓÉϵͳ²úÉúµÄ´íÎó£¨& ......

SQL Server Ë«»úÈȱ¸1(based on log shipping)

        ÈÕÖ¾´«ËÍÊÇSQL SERVER2000ÆóÒµ°æ½øÐÐË«»úÈȱ¸µÄÒ»¸öÖ÷Òª½â¾ö·½°¸£¬ÆäÔ­Àí±È½Ï¼òµ¥£¬ÊµÏÖÒ²±È½Ï·½±ã£¬Ö»ÊÇÓÉÓÚºÍWindowsÖ®¼ä´í×Û¸´ÔӵĹØÏµ£¬µ¼ÖÂÉèÖÃÆðÀ´Óв»ÉÙÀ§ÄÑ£¬³öÏÖÎÊÌâÒ²²»ÈÝÒ×Õï¶Ï¡£
1.ʵÏÖ¸ÅÊö
 *Ë«»úÈȱ¸Õë¶ÔµÄÊǾßÌåµÄij¸öÊý¾Ý¿â¶ø²»ÊÇÕû¸ö·þÎñÆ÷
 Ë«» ......

SQL Server 2000 Êý¾Ý¿âͬ²½

SQL Server 2000 Êý¾Ý¿âͬ²½ÅäÖõÄÔ­Àí
¸´ÖƵĸÅÄî
Microsoft? SQL Server? 2000 µÄ¸´ÖÆÊÇÔÚÊý¾Ý¿âÖ®¼ä¶ÔÊý¾ÝºÍÊý¾Ý¿â¶ÔÏó½øÐи´ÖÆ
ºÍ·Ö·¢²¢½øÐÐͬ²½ÒÔÈ·±£ÆäÒ»ÖÂÐÔµÄÒ»×é¼¼Êõ¡£
ʹÓø´ÖÆ¿ÉÒÔ½«Êý¾Ý·Ö·¢µ½²»Í¬Î»Öã¬Í¨¹ý¾ÖÓòÍø¡¢Ê¹Óò¦ºÅÁ¬½Ó¡¢Í¨¹ý Internet ·Ö
·¢¸øÔ¶³Ì»òÒÆ¶¯Óû§¡£¸´ÖÆ»¹Äܹ»Ê¹Óû§Ìá¸ßÓ¦ÓóÌÐòÐÔÄÜ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ