| AWS |
lambdaタグが付けられた新着投稿 - Qiita |
オープンデータ（GBFS）とM5Stackを使ってシェアサイクルスイッチを作ってみた |
https://qiita.com/keijipoon/items/b617e9701f016a04eec7
|
mstack |
2022-12-10 22:32:18 |
| python |
Pythonタグが付けられた新着投稿 - Qiita |
プログラミングにおけるChatGPTの使い方(制作編) |
https://qiita.com/kakari8888/items/6a22338b41640f6fdd03
|
chatgpt |
2022-12-10 22:58:15 |
| python |
Pythonタグが付けられた新着投稿 - Qiita |
Pythonで書いた45行のリバーシプログラム |
https://qiita.com/y-tetsu/items/a961a70cc431e7bb8664
|
https |
2022-12-10 22:12:27 |
| Ruby |
Rubyタグが付けられた新着投稿 - Qiita |
【解決】axios.deleteのリクエストがsinatraで受け取れずに困った |
https://qiita.com/yamahei/items/38b3d2daa14bca3637cb
|
payload |
2022-12-10 22:14:44 |
| AWS |
AWSタグが付けられた新着投稿 - Qiita |
TerraformでEventBridge SchedulerのAtスケジュールを使って時限起動するLambdaを自動構築する |
https://qiita.com/neruneruo/items/34d5092af44d79914849
|
asiatokyo |
2022-12-10 22:28:05 |
| 技術ブログ |
Developers.IO |
[セッションレポート]成長と変革を推進するためのビジネスの将来性 (PRT287) #reInvent |
https://dev.classmethod.jp/articles/reinvent2020-session-prt287/
|
egrowthandtransformation |
2022-12-10 13:24:52 |
| 海外TECH |
DEV Community |
How join works internally in SQL - part 2 |
https://dev.to/amitiwary999/how-join-works-internally-in-sql-part-2-142m
|
How join works internally in SQL part In the last blog I wrote about the physical joins used by the SQL engine Before version MySQL had only nested loop join but hash join was included in version Postgresql and sql server has nested loop join hash join and merge join In this blog post I will explain how SQL engine decide which physical join to use When two tables joined then both tables traversed once or multiple times to find the matched data Merge join is best because it requires traversing both tables once Merge join requires both inputs to be sorted on join keys or the join key is clustered index It traverses the outer table and finds the matching data in the inner table Once it found the data then it moved to the next row If data is not found then move to the next row of the table that has the lowest value Since both tables are sorted on the join key it can move to the next row of the table that has the lowest value because the value in the next row will be higher than the current row There is a chance that the value in the other table has a high value that can be found in the next row If the table is not already sorted then the SQL engine may decide to sort it and do the inner join if it is more optimized But for that it is necessary that the SQL engine should be able to sort the data on the join key Also one more important thing for merge join is that there should be at least one equijoin expression Nested loop join traverses through the inner table multiple times For each value of the outer table it traverses the inner table to find the matched value If the join key is indexed in the inner table then it will use to find the data in a more optimized way A nested inner join is used when one table is small and the other is large The small table is used as the outer table and the large table is used as the inner table The inner table is traversed for each row of the outer table that s why it is more time consuming If the outer table has n elements and the inner table has m elements then the time complexity can be n m or n logm if the join key is indexed then the index will use to find the data in the table If it requires sorting the data on the join key and this operation is expensive then the loop through all rows to find the matching data then nested loop join might prefer over merge join We discussed merge join and nested loop join and hash join need to discuss There are two phases in hash join One phase is the build phase and the other is the probe phase One of the tables is used in the build phase and the other is used in the probe phase In the build phase all the rows of the build table are scanned and used to generate the hash key using a hash function and save it in the in memory hash table In the probe phase we go through all the rows of the probe table and generate the hash key using the hash function and the join key of the probe table Find the hash key in the in memory hash table If the key is found then join the row of both tables Key lookup is fast in the hash table Like merge join at least one equijoin expression requires in hash join too The hash table generated during the build phase is saved in the in memory that s why we chose the small table for the build phase so that less memory is used If there is a memory issue some of the partitions of the hash table are swapped to tempdb and whenever there is a need it is loaded in the cache If the join table is large and there is no index on the join key then the hash join can be very efficient Merge join works If the join key is indexed nested loops join need to go through all the rows of the inner table again and again and if the table is very large then it can be expensive You don t need to specify which join type SQL should use SQL engine is intelligent enough to find the optimized physical join to use depending on the conditions But you can make sure you are doing your best to design the database schema index the column and do the join query using the correct columns |
2022-12-10 13:17:05 |
| 海外TECH |
DEV Community |
Ultimate Frontend Development Roadmap |
https://dev.to/shreyvijayvargiya/ultimate-frontend-development-roadmap-4inn
|
Ultimate Frontend Development RoadmapUnder the HoodHi My name is Shrey I am an Entrepreneur Developer Designer and Writer with years of industry experience in running a company and building products and managing a team I have been asked a lot of questions about How did I start my Frontend Development journey And whether is it difficult for Non computer science background to succeed in software development Well the answer Yes amp No it depends on you if you are enjoying the process it s will not be rocket science and all you need to do is to stay consistent So if you are a developer or college student who wants to know how to become a frontend developer then I made this template called Ultimate Roadmap for Frontend DevelopmentThis template basicallyHelps you to understand all tech stack or languages you need to learnHow much time it should take to cover each topicFrom where you can learn these tech stacks including top youtube channels andTrack your growth while learning using drag n drop functionality to stay consistent focus This template is summarised version of my years of industry experience here are the steps on how to use itFirst you get the template from the link in the description Duplicate the template on the Notion applicationNow start with things to learn and pick the topic you want to learn but I recommend starting from the top ones followed by moving to the next topics Next is to open the topic on the new dedicated page and go to the core conceptsAll the core concepts can be learned from the links given below in the resources tableYou only need to cover core concepts rest you can learn while developing projects Once you start the topic or complete the topic simply go to the Growth Tracker page and update the status of each topic This will help you stay consistent and focused Roadmap India shorturl at bmAOZWorldwide shorturl at mwAKOWhat you will get in the template A thread Learn top tech stack to become a top front end developer Track your learning growth to stay focusedA dedicated section for each topic to help you master topicsAll top notch websites youtube channels and blogs at once place to avoid wasting time in searching ConclusionIf you face any issues in buying templates or in using the template let me know or DM me and I will help you I hope you like it Until next time have a good day Keep developingShreyiHateReading |
2022-12-10 13:02:11 |
| Apple |
AppleInsider - Frontpage News |
How to improve your health by heeding Apple Watch stand directions |
https://appleinsider.com/inside/apple-health/tips/how-to-improve-your-health-by-heeding-apple-watch-stand-directions?utm_medium=rss
|
How to improve your health by heeding Apple Watch stand directionsAccording to the American Heart Association sedentary jobs have increased by over the last sixty years ーand we re only getting sicker because of it Here s how your Apple Watch can help ーif you listen to it The Apple Watch Ultra shown can help you improve your health if you let itIt is not just standing or sitting that summons the grim reaper It is adopting a lifestyle of moving too little that has deadly repercussions Read more |
2022-12-10 13:57:27 |
| Apple |
AppleInsider - Frontpage News |
Daily deals Dec. 10: $80 Apple TV 4K , $800 M1 MacBook Air, $140 Eufy RoboVac G20, more |
https://appleinsider.com/articles/22/12/10/daily-deals-dec-10-80-apple-tv-4k-800-m1-macbook-air-140-eufy-robovac-g20-more?utm_medium=rss
|
Daily deals Dec Apple TV K M MacBook Air Eufy RoboVac G moreSaturday s best deals include up to off Eero mesh Wi Fi off third gen AirPods up to off D amp D books and much more Best deals for December Every day AppleInsider scours online retailers daily to find discounts and offers on hardware and accessories including Apple devices smart TVs accessories and other gear The best offers we find are put together into our Daily Deals list for our readers to browse and save money Read more |
2022-12-10 13:35:34 |
| 海外TECH |
CodeProject Latest Articles |
Applying Custom Similarity Calculation in Elasticsearch |
https://www.codeproject.com/Tips/5349236/Applying-Custom-Similarity-Calculation-in-Elastics
|
relevance |
2022-12-10 13:03:00 |
| ニュース |
@日本経済新聞 電子版 |
ノーベル平和賞授賞式、ウクライナ・ロシア人権団体など
https://t.co/1qkeXvqAtV |
https://twitter.com/nikkei/statuses/1601573124318801920
|
人権団体 |
2022-12-10 13:42:43 |
| ニュース |
@日本経済新聞 電子版 |
岸田首相の10日の記者会見要旨
https://t.co/s230nnvS3B |
https://twitter.com/nikkei/statuses/1601566962160541696
|
記者会見 |
2022-12-10 13:18:14 |
| ニュース |
BBC News - Home |
About a dozen missing in 'devastating blast' |
https://www.bbc.co.uk/news/world-europe-jersey-63927386?at_medium=RSS&at_campaign=KARANGA
|
blast |
2022-12-10 13:35:02 |
| ニュース |
BBC News - Home |
Ruth Madoc: Hi-de-Hi! actress dies aged 79 |
https://www.bbc.co.uk/news/entertainment-arts-63927507?at_medium=RSS&at_campaign=KARANGA
|
madoc |
2022-12-10 13:21:30 |
| ニュース |
BBC News - Home |
UK weather: Snow and ice warnings continue for this weekend |
https://www.bbc.co.uk/news/uk-63926328?at_medium=RSS&at_campaign=KARANGA
|
warnings |
2022-12-10 13:32:22 |
| ニュース |
BBC News - Home |
Patient's last wish granted as Tom Hardy calls |
https://www.bbc.co.uk/news/uk-england-coventry-warwickshire-63924684?at_medium=RSS&at_campaign=KARANGA
|
appeal |
2022-12-10 13:19:44 |
| ニュース |
BBC News - Home |
Pakistan v England: Hosts' collapse gives tourists control of second Test in Multan |
https://www.bbc.co.uk/sport/cricket/63927656?at_medium=RSS&at_campaign=KARANGA
|
Pakistan v England Hosts x collapse gives tourists control of second Test in MultanEngland take control of the match and series thanks to a dramatic Pakistan collapse on day two of the second Test in Multan |
2022-12-10 13:30:07 |
| 北海道 |
北海道新聞 |
「若い世代、献血して」 学生団体、札幌で呼びかけ |
https://www.hokkaido-np.co.jp/article/773268/
|
減少傾向 |
2022-12-10 22:04:57 |
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