top N percent聽 (),
with ties order by,top ,
distinct聽 2.Count()
count(*)聽 ,avg,max,min,sum
3.Group by ,:,,Having group by where ,where,having.
4.RCube Compute Compute by 5. : 1 inner join 2 on :select distinct (lastname+' '+firstname) as name,orderid from employees as e inner join orders as o on e.employeeid=o.employeeid
:,:table1,table1table2,table2Table1 left join table2 on expression
Table1 left outer join table2 on expression
:table2,table2table1,table1Table1 right join table2 on expression
Table1 right outer table2 on expression
:,.
Table1 full join table2 on expression
Table1expression
聽
:where,table1,table2,Table1 cross join table2
聽
6.Union聽 [all],all
.
聽
7.
DML,.32,,.
:
,where.
,.
鍏堝灞傛煡璇㈠啀鍐呭眰鏌ヨ鍐嶅灞傚啀鍐呭眰
:select lastname,firstname from employees as e where '1998-1-1' in (select orderdate from orders as o where o.employeeid=e.employeeid)
exists(not exists),,true ,false
:select lastname,firstname from employees as e where exists (select * from orders as o where o.employeeid=e.e.employeeid and o.orderdate='1998-1-1')
聽 where.
,.
聽:select lastname,firstname from employees where employeesid in (select employeesid from orders where orders.orderdate='1998-1-1')
聽
瀛愭煡璇㈠彲浠ヤ綔涓烘淳鐢熺殑琛?/p>
鍙互浣滀負琛ㄨ揪寮?/p>
Select聽 productname,unitprice,(unitprice-(select avg(unitprice) from products) ) as diff from products where productname='chai'
妯℃嫙鑱旀帴瀛愬彞
having
鐤鵑涔嬬嫾鐨刯ava涔嬫梾 2006-10-09 14:21 鍙戣〃璇勮
]]>鐤鵑涔嬬嫾鐨刯ava涔嬫梾 2006-06-26 14:44 鍙戣〃璇勮
]]>聽
01. 涓嶈"涓嶅彲鑳?涓変釜瀛?
02. 鍑′簨絎竴鍙嶅簲:鎵炬柟娉?鑰屼笉鏄壘鍊熷彛. 銆銆
03. 閬囧埌鎸姌瀵硅嚜宸卞ぇ澹拌:澶浜? 銆銆
04. 涓嶈娑堟瀬鐨勮瘽,涓嶈惤鍏ユ秷鏋佹儏緇?涓鏃﹀嚭鐜扮珛鍗蟲闈㈠鐞嗐銆
05. 鍑′簨鍏堣绔嬬洰鏍?騫朵笖灝介噺鍒朵綔"姊︽兂鐗?. 銆銆
06. 鍑′簨棰勫厛浣滆鍒?灝介噺灝嗙洰鏍囪瑙夊寲. 銆銆
07. 宸ヤ綔鏃墮棿.姣忎竴鍒?姣忎竴縐掗兘鍋氭湁鍒╀簬鐢熶駭鐨勪簨鎯? 銆銆
08. 闅忔椂鐢ㄩ浂紕庣殑鏃墮棿(濡傜瓑浜恒佹帓闃熺瓑)鍋氶浂紕庣殑浜嬫儏. 銆銆
09. 瀹堟椂. 銆銆
10. 鍐欎笅鏉?涓嶈澶緷闈犺剳琚嬭蹇? 銆銆
11. 闅忔椂璁板綍鐏墊劅. 銆銆
12. 鎶婇噸瑕佺殑瑙傚康,鏂規硶鍐欎笅鏉?騫惰創璧鋒潵,浠ラ殢鏃舵彁紺鴻嚜宸?
13. 璧拌礬姣斿鉤鏃跺揩30%,璧拌礬鏃惰剼灝栫◢鐢ㄥ姏鎺ㄨ繘,鑲綋璇█鍋ュ悍鏈夊姏,涓嶆噿 鏁?钀庨潯.
14. 姣忓ぉ鍑洪棬鐓ч暅瀛?緇欒嚜宸變竴涓嚜淇＄殑寰瑧. 銆銆
15. 姣忓ぉ鑷垜鍙嶇渷涓嬈? 銆銆
16. 姣忓ぉ鍧氭寔涓嬈¤繍鍔? 銆銆
17. 鍚績璺充竴鍒嗛挓,鎸囧湪鍋氶噸瑕佷簨鎯呭墠,鐤插姵鏃?蹇冩儏鐑﹁簛鏃?绱у紶鏃? 銆銆
18. 寮浼氬潗鍦ㄥ墠鎺? 銆銆
19. 寰瑧. 銆銆
20. 鐢ㄥ績鍊懼惉,涓嶆墦鏂鏂硅璇? 銆銆
21. 璇磋瘽鏃跺０闊蟲湁鍔?鎰熻鑷繁澹伴煶浼間箮鑳戒駭鐢熸湁鎰熸煋鍔涚殑紓佸満.
22. 璇磋瘽涔嬪墠,鍏堣冭檻涓涓嬪鏂圭殑鎰熷彈. 銆銆
23. 姣忓ぉ鏈夋剰璇?鐪熻瘹鍦拌禐緹庡埆浜轟笁嬈′互涓? 銆銆
24. 鍙婃椂鍐欐劅璋㈠崱,鍝曟槸鐢ㄤ究絎哄啓. 銆銆
25. 涓嶇敤璁枼,鎸囪矗鐨勫彛鍚昏窡鍒漢璇磋瘽. 銆銆
26. 鎺у埗浣忎笉瑕佽鑷繁鍋氬嚭涓鴻嚜宸辮京鎶ょ殑絎竴鍙嶅簲. 銆銆
27. 姣忓ぉ鍋氫竴浠?鍒嗗浜?. 銆
28. 涓嶇浠諱綍鏂歸潰,姣忓ぉ蹇呴』鑷沖皯鍋氫竴嬈?榪涙涓鐐圭偣". 銆銆
29. 姣忓ぉ鎻愬墠15鍒嗛挓涓婄彮,鎺ㄨ繜30鍒嗛挓涓嬬彮. 銆銆
30. 姣忓ぉ鍦ㄤ笅鐝墠鐢? 鍒嗛挓鐨勬椂闂村仛涓澶╃殑鏁寸悊宸ヤ綔. 銆銆
31. 瀹氭湡瀛橀挶. 銆銆
32. 鑺備凱. 銆銆
33. 鏃跺父榪愮敤"澶磋剳椋庢毚". 銆銆
34. 鎭畧璇氫俊,璇村埌鍋氬埌.
35. I am the best One!!!
鐤鵑涔嬬嫾鐨刯ava涔嬫梾 2006-06-24 19:34 鍙戣〃璇勮
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