日期:2014-05-16  浏览次数:20526 次

oracle浼樺寲-----缁熻鎺掑簭鏁堢巼



聽鍏堣鏄庝笅涓氬姟鏌ヨ涓昏瀛楁(id,org_code,org_name,org_count鍏朵腑org_count涓鸿绠楃粺璁″嚭鐨勬暟閲?鎸夋暟閲忓墠10鏉″€掑簭鎺掑垪棣栧厛鑰冭檻鍒扮敤鍒嗛〉杈撳嚭鏉ユ帶鍒舵晥鐜?/p>

鍏堣创涓婅鍙?/p>

SELECT t.ID,t.ORG_CODE,t.ORG_NAME,t.ORG_COUNT from
(SELECT ROWNUM RN ,A.ID,A.ORG_CODE,A.ORG_NAME,A.ORG_COUNT FROM
(SELECT c.ID,c.ORG_CODE,c.ORG_NAME,
(SELECT count(ID) from llt_report b where b.SEND_ORG_ID=c.ID) as ORG_COUNT from Llt_Org_Info c order by ORG_COUNT desc)
聽A WHERE ROWNUM <=10) t WHERE RN >0

鍥犱负oracle 涓笉鏀寔top 鍏抽敭瀛楋紝鍒嗛〉鍙兘闈爎ownum 鏉ユ帶鍒舵潯鏁版潵鏄剧ず锛屼絾鏈€鍐呭眰鏌ヨ鏃跺凡缁忔妸鎵€鏈夌粨鏋滈兘鎵弿涓€閬?/p>

SELECT c.ID,c.ORG_CODE,c.ORG_NAME,
(SELECT count(ID) from llt_report b where b.SEND_ORG_ID=c.ID) as ORG_COUNT from Llt_Org_Info c order by ORG_COUNT desc

鍦ㄧ敤鍒嗛〉鎺у埗鏃跺氨鏄鎵€鏈夋煡璇㈢粨鏋滃垎椤?骞舵病鏈夊彧鏌?0鏉$劧鍚庡杩?0鏉℃帓搴?涔熷氨鏄鍒嗛〉骞舵病鏈夎捣鍒颁富瑕佷綔鐢?

濡傛灉鍦ㄦ煡璇腑鐢≧OWNUM 鎺у埗浣忔潯鏁颁絾缁撴灉鍙堜笉瀵?br>SELECT c.ID,c.ORG_CODE,c.ORG_NAME,
(SELECT count(ID) from llt_report b where b.SEND_ORG_ID=c.ID) as ORG_COUNT from Llt_Org_Info c

where聽rownum<=10聽order by ORG_COUNT desc

缁忚繃鍙嶅娴嬭瘯鍙戠幇闂涓昏闆嗕腑鍦╫rder by 鎺掑簭鍚庢晥鐜囨槑鏄句笅闄?璇存槑鏌ヨ鏃秓racle鍏堝琛ㄧ粺涓€鏌ヨ涓€閬嶇劧鍚庡張鎺掑簭閲嶆墽琛屼竴閬?锛侊紒(浣嗘帓搴忓繀椤讳繚鐣?

棣栧厛oracle涓劅瑙夊垎椤靛お绻佺悙锛屼笉鏂灞傚眰缁撴灉闆嗚繘绋嬫搷浣滐紝棰戠箒浣跨敤select鏌ヨ 澧炲姞瀵硅〃鐨勬搷浣滄鏁伴檷浣庝簡鏌ヨ鏁堢巼

10鏉℃煡璇㈣€楁椂绾?.4绉?/p>

閭d箞Oracle涓浣曟搷浣滅粺璁$殑瀛楁鎺掑簭

浼樺寲鐨勫嚑鐐瑰缓璁細

1鍋ュ.鐨剆ql涓嶈渚濊禆鏁版嵁杩涜鏉′欢杩囨护锛岃鏍规嵁琛ㄧ殑鍒濊》璁捐鏉ヨ繘琛岃繃婊ゆ潯浠?/p>

2瑕侀€夊ソ鍩虹琛紝(鍩虹琛ㄦ爣鍑?淇℃伅娑电洊鍏紝鏁版嵁閲忓敖鍙兘灏?濂芥瘮闆姳鍨嬭璁′腑鐨勪腑蹇?

鐜板湪鑰冭檻鐩存帴绛涢€夊嚭鎵€闇€瀛楁锛岀粍鎴愮粨鏋滈泦

--浼樺寲鍚?br>select t.send_org_id,
(select a.org_code from llt_org_info a where a.id=t.send_org_id) as org_code,
(select a.org_name from llt_org_info a where a.id=t.send_org_id) as org_name,
count(t.send_org_id) as count_send_org_id聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 ----缁熻鏁伴噺鐨勫瓧娈?/p>

from llt_report t
where t.send_org_id in (select id from llt_org_info)聽聽聽聽聽聽 --杩囨护闈炴墍闇€淇℃伅
group by t.send_org_id order by count_send_org_id desc

聽鑰楁椂澶х害0.09绉?/p>

鏁堢巼鏈変簡璐ㄧ殑鏀瑰彉

鎬荤粨:oracle涓帓搴忎笉寤鸿鐢╫racle涓彁渚涚殑ROWNUM鍒嗛〉锛屽洜涓篟OWNUM鍙兘瀵规煡璇㈢殑鎵€鏈夌粨鏋滃湪杩囨护锛屽苟娌″湪鏌ヨ涓帶鍒舵暟閲?锛屽缓璁洿鎺ョ瓫閫夊瓧娈垫帓搴忎笉浠呭噺灏戜簡SELECT鐨勯绻佷娇鐢紝涔熶娇璇彞缁撴灉鏇村姞鏄庢湕锛?/p>