From Jonathan Trevor's presentation "Yahoo! Query Language - YQL: Select * from Internet - Including Live Demo!" at the 2009 Cloud Computing Expo in Santa Clara, CA, USA. Here's the talk description on the Expo's site: http://cloudcomputingexpo.com/event/session/505

1. select * from internet Yahoo Query Language: Jonathan Trevor

2. Application ?

3. + data visualization data manipulation Application =

4. data

5. data

7. var map = new YMap(document.getElementById('map'));…varcurrentGeoPoint = new YGeoPoint( _c.Lat, _c.Lon ); map.addMarker(currentGeoPoint);… ? … if (flickcurl_prepare(fc, "flickr.photos.geo.correctLocation", parameters, count)) { … } … ? ? http://search.yahooapis.com/ImageSearchService/V1/imageSearch?appid=YahooDemo&query=Corvette&results=2 ? http://weather.yahooapis.com/forecastrss?p=FRXX0076&u=c

8. var map = new YMap(document.getElementById('map'));…varcurrentGeoPoint = new YGeoPoint( _c.Lat, _c.Lon ); map.addMarker(currentGeoPoint);… ? … if (flickcurl_prepare(fc, "flickr.photos.geo.correctLocation", parameters, count)) { … } … ? ? http://search.yahooapis.com/ImageSearchService/V1/imageSearch?appid=YahooDemo&query=Corvette&results=2 ? http://weather.yahooapis.com/forecastrss?p=FRXX0076&u=c

9. var map = new YMap(document.getElementById('map'));…varcurrentGeoPoint = new YGeoPoint( _c.Lat, _c.Lon ); map.addMarker(currentGeoPoint);… … if (flickcurl_prepare(fc, "flickr.photos.geo.correctLocation", parameters, count)) { … } … http://search.yahooapis.com/ImageSearchService/V1/imageSearch?appid=YahooDemo&query=Corvette&results=2 http://weather.yahooapis.com/forecastrss?p=FRXX0076&u=c Bindings YQL YQL stmt select desc show

10. Why YQL? Thousands of Web Services and sources that provide valuable data Require Developers to read documentation and form URLs/queries. Data is isolated Needs filtering, combining, tweaking, shaping even after it gets to the developer.

11. YQL Cloud web service and SQL-Like Language Familiar to developers Synonymous with Data access Expressive enough to get the right data. Self describing - show, desc table Allows you to query, filter, join and update data across any structured data on the web / web services And Yahoo’s sherpa cloud storage Real time engine

12. YQL Statement Basics show: lists the supported tables desc: describes the structure of a table select: fetches data insert/update/delete: modify data use: use an Open Data Table set: define key-values across Open Data Tables

13. Demo: developer.yahoo.com/yql/

14. Get any data: Open Data Tables

15. Open Data Tables Bindings YQL

16. Open Data Tables Map YQL to Endpoint YQL

17. USE Verb and environment files use ‘http://url-to-def.xml’ as tableName; select * from tableNamewhere key=‘value’... Imports the Open Data Table definition Makes it available as tableName Acts just like other YQL Tables Open tables can be collected together into environment files

18. Open Developer Community Leverage the work of others github repository http://github.com/yql/yql-tables/tree/master datatables.orgmirrors the master and builds a single environment with all tables (faster serving) Console with community tables

19. Insert / Update / Delete With INSERT/ UPDATE/ DELETESQL verbs you can modify data on the internet or cloud create tweets, add blog entries, update DBs etc store tables or pieces of code in sherpa Some tables with I/U/D Twitter Status, Bit.ly shortener Yahoo profile status, application update stream Amazon SimpleDB

20. INSERT INTO Cloud

21. yql.storage / yql.storage.admin tables Allow developers to store and work with data in YQL itself share tables, environments and JavaScript with anyone hosted by YQL Layered on Yahoo! Sherpa DHT cloud storage platform globally available, quick everywhere Storage mapped to INSERT/UPDATE/DELETE

22. yql.storage / yql.storage.admin tables insert into yql.storage.admin(url) values ("http://dom.com/table.xml") Token based capabilities and access control Using a stored piece of data <inserted> <execute>store://4cd56a99-7xxx-4600-ade1-3bf7f5a11193</execute> <select>store://08fd2c74-dxxx-48c4-9ee1-3bf7e5a1ec92</select> <update>store://3cc85a99-6xxx-4600-ade1-f7f83ecc4b83</update> </inserted> use “store://4cd56a99-7xxx-4600-ade1-3bf7f5a11193” as mytable;select * from mytable where …

23. Building your own open data tables

24. Open Data Tables Brings the power of the table model to new APIs Schema defines mapping between YQL and Endpoint Keys can either be query, path or matrix parameters Keys can be marked as required YQL Compiler validates existence of required keys

25. YQL Open Data Table example

26. Open Data Table example

27. Open Data Table example

28. <execute> element Extends Open Data Tables with server-side code Javascript server-side scripting No DOM, events etc, pure JS scripting E4X support - XML literals, filtering ... YQL no longer performs a GET request to the table binding URL YQL provides additional useful global objects request, response, y.rest, y.include, y.query... Execute tag must return the data that will be the output of the YQL select Move business logic of your application to the cloud

29. YQL <execute> access APIs that require authentication Netflix OAuth, FlickrAuth, Google AuthSub join data across services grab New York Times article tags and generate find associated flickr photos combine multiple searches into a single result (twitter, web, news and images) augment data: city/state to APIs that just return zip code create APIs from web page celebrity birthdays scraped from imdb, caltrain data transformation convert the result from xml to Google's kml format

30. hello world <table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta> <sampleQuery>select * from {table} where a='cat' and b='dog';</sampleQuery> </meta> <bindings> <select itemPath="" produces="XML"> <urls><url>http://fake.url/{a}</url></urls> <inputs> <key id='a' type='xs:string' paramType='path' required="true" /> <key id='b' type='xs:string' paramType='variable' required="true" /> </inputs> <execute><![CDATA[ // Your javascript goes here. We will run it on our servers response.object = <item> <url>{request.url}</url> <a>{a}</a> <b>{b}</b> </item>; ]]></execute> </select> </bindings> </table>

31. Scraping a page <select produces="XML" itemPath="deals.deal"> <urls><url>http://deals.yahoo.com</url></urls> <execute><![CDATA[ vardealhtml = y.query("select * from html where url='http://deals.yahoo.com' and xpath='//div[contains(@class, amp;quot;product-displayamp;quot;)]'").results; var deals = <deals/>; function compress(object) { if (!object) return ""; return object.toString().replace(/+/, " ") } for each (var div in dealhtml.div) { var deal = <deal/>; deal.name += <name>{compress(div.h3.a.text())}</name>; deal.link += <link>{div.div[0].a.@href}</link>; … deal.description += <description>{compress(div.p[0].*)}</description>; deal.logo += <logo>{compress(div.div[1].*)}</logo>; deals.deal += deal; } response.object = deals; ]]></execute> </select>

32. Inner join (unified web+image search) <table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <bindings> <select itemPath="results.result" produces="XML"> <inputs> <key id="query" type="xs:string" paramType="query" required="true"/> </inputs> <execute><![CDATA[ varqs = query; var search = y.query('select * from search.web(50) where query=@query', {query: qs}).results; var images = []; default xml namespace='http://www.inktomi.com/'; for each (var result in search.result) { images.push(y.query('select * from search.images(1) where query=@query and url=@url', {url:result.url, query:qs})); } vari = 0; for each (var result in search.result) { var image = images[i++].results.result; if (image) { result.image = <image>{image}</image>; } } response.object = search; ]]></execute> </select> </bindings> </table>

33. select *from twitter.statuswhere id="2108869549"andusername="xxx"and password="yyy” <select itemPath="" produces="XML"> <urls><url>http://twitter.com/statuses/show/{id}.xml</url></urls> <inputs> <key id="username" type="xs:string" required="false" paramType="variable"/> <key id="password" type="xs:string" required="false" paramType="variable"/> <key id="id" type="xs:integer" required="true" paramType="path"/> </inputs> <execute><![CDATA[ varr = null; if (username && password) { y.include("http://yqlblog.net/samples/base64.js"); varauthheader = "Basic "+Base64.encode(username+":"+password); r = request.header("Authorization",authheader).get().response; } else { r = request.get().response; } response.object = r; ]]></execute> </select>

34. insert into twitter.status(status,username,password)values ("new tweet from YQL",”xxx”,”yyy”); <insert itemPath="" produces="XML"> <urls> <url>http://twitter.com/statuses/update.xml</url> </urls> <inputs> <value id="username" type="xs:string" required="true" paramType="variable"/> <value id="password" type="xs:string" required="true" paramType="variable"/> <value id="status" type="xs:string" required="true" paramType="variable"/> </inputs> <execute><![CDATA[ y.include("http://yqlblog.net/samples/base64.js"); varauthheader = "Basic "+Base64.encode(username+":"+password); var content = "status="+status; response.object = request.header("Authorization",authheader).post(content).response; ]]></execute> </insert>

35. delete from twitter.statuswhere id="2108869549"and username="xxx"and password="yyy” <delete itemPath="" produces="XML"> <urls> <url>http://twitter.com/statuses/destroy/{id}.xml</url> </urls> <inputs> <key id="username" type="xs:string" required="true" paramType="variable"/> <key id="password" type="xs:string" required="true" paramType="variable"/> <key id="id" type="xs:string" required="true" paramType="path"/> </inputs> <execute><![CDATA[ y.include("http://yqlblog.net/samples/base64.js"); varauthheader = "Basic "+Base64.encode(username+":"+password); response.object = request.header("Authorization",authheader).del().response; ]]></execute> </delete>

36. Conclusion More easily build applications fewer lines of code data processing done away from app consistent and familiar syntax for all data access iterative environment for developing the query

38. store tables, environments, js, text files…

39. conversion, filtering, parallel requests...With smaller network footprint fewer (client) calls smaller data amounts closer to the data, fatter pipes

40. data YQL

41. YQL: select * from internet Jonathan Trevor Questions? http://developer.yahoo.com/yql