sql top n

新兵培養中心

4月 1, 2013

范姜慕秋

kuso

Oracle top-n SQL - Oracle Consulting, Oracle Support and Oracle Training by BC Or軍官的家mark 是一位標準的軍人，他連自己的家中的每一個地方，都給它冠上跟軍事有關的名稱..比如說：廚房稱為「後勤補給中心」.....客廳稱為「軍事情報站」兒子的臥房稱為 「男兵宿舍」.....女兒的臥房稱為 「女兵宿舍」 ......有一天，有客人到 mark家，在看過上面的稱謂之後嘖嘖稱奇， Question: I need to write a query that performs a top-10 SQL, and I hear that top-n queries are tricky in Oracle. What are the methods to get top-n rows back in Oracle SQL? Answer: Oracle top-n SQL is tricky! Yes, being declarative, there are many ways to...

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我昨晚碰到鬼擋牆

4月 1, 2013

梁寒瑤

kuso

SQL SERVER – Performance Comparison – INSERT TOP (N) INTO Table – Using Top with INSERT | Journey to笑...(妙答)超自然 我昨晚碰到鬼擋牆，為啥我立刻吃了一盅佛跳牆還是走不出去？ 答：你不是佛，吃再多的佛跳牆也是沒用的；還有，你沒事帶佛跳牆在身上幹麻？[超自然 ] 算命的說我命短，我該抽長壽煙來延長壽命嗎？ 答：建議抽新樂園直接上天堂以免夜長夢多。 [兩性關係 ] Recently I wrote about SQL SERVER – INSERT TOP (N) INTO Table – Using Top with INSERT I mentioned about how TOP works with INSERT. I have mentioned that I will write about the performance in next article. Here is the performance comparison of the two ......

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換位子

4月 1, 2013

林若綠

kuso

Top-N Rows Queries | SQL Performance Explained有對夫妻結婚多年，丈夫總是忘記一些特別的日子，結婚三十五週年那天，他們在餐桌吃早餐時，妻子 向她 先生暗示：「老伴，你知不知道，我們坐在這兩張椅子上已經整整三十五年了?」丈夫徐徐放下報紙，望著老婆說： 「妳...是不是想跟我換位子?」Top-N queries are queries that limit the result to a specific number of rows. These are often queries for the most recent or the “best” entries of a result set. For efficient execution ......

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白痴知識問答

4月 1, 2013

黃懷雙

kuso

SQL SERVER – INSERT TOP (N) INTO Table – Using Top with INSERT | Journey to SQL Authority with Pinal問:我家附近有人養狗..而且不管它隨便跑，經常晚上在我家門口拉屎，有沒有辦法不讓它在我家拉屎嗎?答:每次狗拉屎的時候，你去偷看，等狗發現了你在偷看，它會害羞的，就再也不敢到你家門口拉屎了!問:電腦瑩幕不停地輕微抖動，有什麼辦法？答:你也不停地抖動，當你的頻率和振幅與抖動畫面一樣時，你就感覺不出來了。It is very interesting to see when Option 2 is used, ORDER BY is absolutely ignored and data is inserted in any order. In future articles, we will talk about performance for these queries. What are your thoughts on this feature? Have you used INSERT TOP(N...

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夫妻對話

4月 1, 2013

梁寄瑤

kuso

SQL: selecting top N records per group | code.openark.org（1）妻：「對於性你有什麼看法？」夫：「看法是沒有，做法倒很多。」夫妻對話（2）妻︰「這次的海邊聚會我穿比基尼去，你說好不好？」夫︰「不行！這樣別人會以為我是看上妳的錢財而結婚的。」夫妻對話（3）妻：「老公！我這頭髮會不會很醜？」夫：「不會。妳的醜跟頭髮沒關係。」夫妻對話（4）妻：「來看看我有沒有斷SQL: selecting top N records per group ... A while back I presented(*) an SQL trick to present with non-aggregated column on a GROUP BY query, without use of subquery or derived tables....

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試穿衣服

4月 1, 2013

林凝晴

kuso

SQL Server : Use CTE to get subject wise top N marks | Technology Talks在一家女裝店裡，一位年輕的先生枯坐著等待他太太試穿衣服。十五分鐘過去，他太太總共試穿了五套衣服，當他太太再度由更衣室出來時，他上下打量了太太一番後，說道：「很好，很好，這件衣服很合身，就買這件吧！」「親愛的，我們今天出門時，我穿的就是這件。」四個跨國際公司的高級主管一起打高爾夫球。在第三洞時，聽到電Introduction : In this post we will see, how one can get top N records category wise. I have made the title of this post as subject wise top N marks secured by students, because I found this is the most asked questions in various forums and blogs for this...

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