ÈýÖÐSQL ·ÖÒ³·½·¨Ð§ÂÊ·ÖÎö
ÈýÖÖSQL·ÖÒ³·¨Ð§ÂÊ·ÖÎö
±íÖÐÖ÷¼ü±ØÐëΪ±êʶÁУ¬[ID] int IDENTITY (1,1)
1.·ÖÒ³·½°¸Ò»£º(ÀûÓÃNot InºÍSELECT TOP·ÖÒ³)
¡¡Óï¾äÐÎʽ£ºÀûÓÃNot InºÍSELECT TOP·ÖÒ³) ЧÂÊÖУ¬ÐèҪƴ½ÓSQLÓï¾ä
SELECT TOP 10 * from TestTable WHERE (Id NOT IN (SELECT TOP 20 id from TestTable ORDER BY id )) ORDER BY ID
2.·ÖÒ³·½°¸¶þ£º(ÀûÓÃID´óÓÚ¶àÉÙºÍSELECT TOP·ÖÒ³)
Óï¾äÐÎʽ£ºÀûÓÃID´óÓÚ¶àÉÙºÍSELECT TOP·ÖÒ³)ЧÂÊ×î¸ß£¬ÐèҪƴ½ÓSQLÓï¾ä
SELECT TOP 10 * from TestTable WHERE (ID > (SELECT MAX(id) from (SELECT TOP 20 id from TestTable ORDER BY id) AST))
3.·ÖÒ³·½°¸Èý£º(ÀûÓÃSQLµÄÓÎ±ê´æ´¢¹ý³Ì·ÖÒ³)
Óï¾äÐÎʽ£ºÀûÓÃSQLµÄÓÎ±ê´æ´¢¹ý³Ì·ÖÒ³) ЧÂÊ×î²î£¬µ«ÊÇ×îΪͨÓÃ
create procedure SqlPager
@sqlstr nvarchar(4000), --²éѯ×Ö·û´®
@currentpage int, --µÚNÒ³
@pagesize int --ÿҳÐÐÊý
as
set nocount on
declare @P1 int, --P1ÊÇÓαêµÄid
@rowcount int
exec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1,@rowcount=@rowcount output
select ceiling(1.0*@rowcount/@pagesize) as ×ÜÒ³Êý--,@rowcount as ×ÜÐÐÊý,@currentpage as µ±Ç°Ò³
set @currentpage=(@currentpage-1)*@pagesize+1
exec sp_cursorfetch @P1,16,@currentpage,@pagesize
exec sp_cursorclose @P1
set nocount off
Ïà¹ØÎĵµ£º
×Ó²éѯ£º
ʹÓÃ×Ó²éѯµÄÔÔò
1.Ò»¸ö×Ó²éѯ±ØÐë·ÅÔÚÔ²À¨ºÅÖС£
2.½«×Ó²éѯ·ÅÔڱȽÏÌõ¼þµÄÓÒ±ßÒÔÔö¼Ó¿É¶ÁÐÔ¡£
×Ó²éѯ²»°üº¬ ORDER BY ×Ӿ䡣¶ÔÒ»¸ö SELECT Óï¾äÖ»ÄÜÓÃÒ»¸ö ORDER BY ×Ӿ䣬
²¢ÇÒÈç¹ûÖ¸¶¨ÁËËü¾Í±ØÐë·ÅÔÚÖ÷ SELECT Óï¾äµÄ×îºó¡£
ORDER BY ×Ó¾ä¿ÉÒÔʹÓ㬲¢ÇÒÔÚ½øÐÐ Top-N ·ÖÎöʱÊDZØÐëµÄ¡£
3.ÔÚ×Ó² ......
Case¾ßÓÐÁ½ÖÖ¸ñʽ¡£¼òµ¥Caseº¯ÊýºÍCaseËÑË÷º¯Êý¡£
--¼òµ¥Caseº¯Êý
CASE sex
WHEN '1' THEN 'ÄÐ'
WHEN '2' THEN 'Å®'
ELSE 'ÆäËû' END
--CaseËÑË÷º¯Êý
CASE WHEN sex = '1' THEN 'ÄÐ'
  ......
Ê×ÏÈ´ò¿ªSQL Server Management Studio£¬½¨Á¢Ò»¸öÊý¾Ý¿â£¬½¨Á¢ºÃÊý¾Ý¿âºóÑ¡ÔñÄãµÄÊý¾Ý¿âÃû£¬ÓÒ¼ü--ÈÎÎñ--µ¼ÈëÊý¾Ý¿â
´ò¿ªSQLµ¼ÈëºÍµ¼³öÏòµ¼--ÏÂÒ»²½--Êý¾ÝÔ´Ñ¡Ôñ£¨Microsoft Access£©--Ñ¡ÔñÄãµÄACCESSÊý¾Ý¿âÈ»ºóÏÂÒ»²½
¡¡
¹Ø¼üµÄÒ»²½ÔÚ“Ñ¡ÔñÔ´±íºÍÔ´ÊÓͼ”ÕâÀѡÔñ±í--±à¼Ó³Éä--Ñ¡ ......
¡í1:È¡µÃµ±Ç°ÈÕÆÚÊDZ¾Ôµĵڼ¸ÖÜ
SQL> select to_char(sysdate,'YYYYMMDD W HH24:MI:SS') from
dual;
TO_CHAR(SYSDATE,'YY
-------------------
20030327 4 18:16:09
SQL> select to_char(sysdate,'W') from dual;
T
-
4 ......
1
:
replace
º¯Êý
µÚÒ»¸ö²ÎÊýÄãµÄ×Ö·û´®£¬µÚ¶þ¸ö²ÎÊýÄãÏëÌæ»»µÄ²¿·Ö£¬µÚÈý¸ö²ÎÊýÄãÒªÌæ»»³Éʲô
select
replace
(
'
lihan
'
,
'
a
'
,
'
b
'
)
--
---------------------------
lihbn
£¨ËùÓ°ÏìµÄÐÐÊýΪ
1
ÐУ©
==== ......