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

ʹÓÃsqlÓï¾ä»ñµÃµ±Ç°ÔÂÌìÊý


 Ê¹ÓÃsqlÓï¾ä»ñµÃµ±Ç°ÔÂÌìÊý
   --»ñµÃµ±ÔÂÌìÊý  
    select day(dateadd(mm,1,getdate())-day(getdate())) as ±¾ÔÂÌìÊý ;  
    select getdate() as µ±Ç°ÈÕÆÚ;  
    select day(getdate()) as Ä¿Ç°µÚ¼¸Ìì;  
    select getdate()-day(getdate())  as ÉϸöÔÂ×îºóÒ»Ìì; -- ¼õÈ¥Á˵±Ç°µÄÌìÊý  
    select dateadd(mm,1,getdate())-day(getdate()) as ¼ÓÉÏÒ»¸öÔÂ; -- Ò²¾ÍÊÇÕâ¸öÔµÄ×îºóÒ»Ìì 
    select day(dateadd(mm,1,getdate())-day(getdate())) as »ñµÃµ±ÔÂÌìÊý;


Ïà¹ØÎĵµ£º

SQL »ù±¾²Ù×÷ ɾ³ý ÐÞ¸Ä Ë¢ÐÂ

SQL³£ÓÃÃüÁîʹÓ÷½·¨£º    
   
  (1)   Êý¾Ý¼Ç¼ɸѡ£º    
   
  sql="select   *   from   Êý¾Ý±í   where   ×Ö¶ÎÃû=×Ö¶ÎÖµ   order   by   ×Ö¶ÎÃû   [desc]"    
   
  sq ......

SQL ³£ÓÃÓï¾ä

Student(S#,Sname,Sage,Ssex) ѧÉú±í
Course(C#,Cname,T#) ¿Î³Ì±í
SC(S#,C#,score) ³É¼¨±í
Teacher(T#,Tname) ½Ìʦ±í
 
ÎÊÌ⣺
1¡¢²éѯ“001”¿Î³Ì±È“002”¿Î³Ì³É¼¨¸ßµÄËùÓÐѧÉúµÄѧºÅ£»
  select a.S# from (select s#,score from SC where C#='001') a,(select s#,score
& ......

Oracle·¢²¼Ãâ·ÑÊý¾Ý¿â¿ª·¢¹¤¾ßSQL Developer 1.2


Oracle·¢²¼Ãâ·ÑÊý¾Ý¿â¿ª·¢¹¤¾ßSQL Developer 1.2
2007.09.25  À´×Ô£ºCSDN¡¡  ÄŲ»º°   ¹²ÓÐÆÀÂÛ()Ìõ ·¢±íÆÀÂÛ    ÊÕ²Ø
Oracle SQL DeveloperÊǼ׹ÇÎĹ«Ë¾Ãâ·ÑÌṩµÄÊý¾Ý¿â¿ª·¢¹¤¾ß£¬¿É°ïÖúÓû§¼ò»¯¿ª·¢¹¤×÷£¬Ìá¸ß±àÖÆºÍµ÷ÊÔSQLºÍPL/SQL´úÂëµÄЧÂÊ¡£ÏÖÔÚ£¬Õâ¸öÃâ·Ñ¹¤ ......

SQL ³£Óú¯Êý ±Ê¼Ç Garin Zhang

SQL³£Óú¯Êý£º
1. ASCII()£º·µ»Ø×Ö·û´®×î×ó¶Ë×Ö·ûµÄASCIIÂë¡£
2. CHAR()£º½«ASCIIת»»³É×Ö·û¡£(0~255)
3. LOWER()ºÍUPPER()¡£
4. STR()£º°ÑÊýÖµÐÍÊý¾Ýת»»Îª×Ö·ûÐÍÊý¾Ý
    SRT(<float_expression>[,length[,<decimal>]])
LTRIM()°Ñ×Ö·û´®Í·²¿¿Õ¸ñÈ¥µô£¬RTRIM()°Ñ×Ö·û´®Î²¿Õ¸ñÈ¥µô¡£
È¡× ......

sql´æ´¢¹ý³Ì

±¾ÎÄ´Ó¶à¸ö½Ç¶È²ûÊöÁËSQL ServerÓë´æ´¢¹ý³ÌµÄ±È½Ï¡£
¢ÙΪʲôҪʹÓô洢¹ý³Ì£¿
ÒòΪËü±ÈSQLÓï¾äÖ´Ðп졣
¢Ú´æ´¢¹ý³ÌÊÇʲô?
°ÑÒ»¶ÑSQLÓï¾äÂÞÔÚÒ»Æð,»¹¿ÉÒÔ¸ù¾ÝÌõ¼þÖ´Ðв»Í¨SQLÓï¾ä¡£
¢ÛÀ´Ò»¸ö×î¼òµ¥µÄ´æ´¢¹ý³Ì£º
CREATE PROCEDURE dbo.testProcedure_AX
AS
select userID from
 USERS order by userid ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ