YQL allows users to access data from web services through SQL-like queries. It presents data from various sources like Flickr, Yahoo services, and third party APIs as tables that can be joined and manipulated. The document provides examples of using YQL to retrieve and manipulate data from the mim API, including getting user profiles, followers, posts, and performing actions like inserting posts. It also demonstrates how YQL can be used to expose third party APIs and to combine data from multiple sources into a single mashup query.

1. Standardizing web querying - Using YQL for accessing and exposing APIs

2. Agenda Introduction to YQL How to get started What’s supported through YQL Theme of the day – mim.yahoo.com Lots of examples using mim API Mashup using YQL Introduction to more YQL goodies Server side javascript execution YQL hosted storage Concluding remarks ..lets keep it interactive

3. YQL – Yahoo Query Language Enables you to access Internet data with SQL-like commands YQL hides the complexity of Web service APIs by presenting data as simple tables, rows, and columns. YQL includes pre-defined tables for popular Yahoo! Web services such as Flickr, Search, Geo andMim. YQL can access services on the Internet that output data in the following formats: HTML, XML, JSON, RSS, Atom, and microformat. Create fast mashups reducing latency, code

4. How to get started Explore the APIs - http://developer.yahoo.com/everything.html Get a developer key - https://developer.apps.yahoo.com/wsregapp/ Read the documentation - http://developer.yahoo.com/yql/guide/ Visit the YQL Console - http://developer.yahoo.com/yql/console/ The YQL Console enables you to run YQL statements interactively from your browser. Hack away..

5. Y! APIs supported by YQL Show tables Flickr Y! geo Y! local search Y! maps Y! mim Y! music Y! MyBlogLog Y! search Y! social Y! upcoming

6. External APIs supported by YQL Through datatables.org Show tables Amazon ECS AWS Bit.ly Comicvine Craigslist Del.icio.us Dopplr Facebook Friendfeed Github Google (News, Search, Translate) Guardian IMDB LastFm MediaWikiAPI Microsoft (Bing) Twitter Zillow

8. In JSON select * from meme.info where owner_guid=me {"query": { "count": "1", "created": "2009-11-19T10:33:11Z", "lang": "en-US", "updated": "2009-11-19T10:33:11Z", "uri": "http://query.yahooapis.com/v1/yql?q=select+*+from+meme.info+where+owner_guid%3Dme", "results": { "meme": { "guid": "NKADUBBZPUQQG6GF6AHTDTABSQ", "name": "shreeni", "title": "Shreeni'sMim", "description": null, "url": "http://mim.yahoo.com/shreeni/", "avatar_url": "http://d.yimg.com/gg/shreeni/avatars/7a0d55f7d0aab9e326a7906a110f8027d46bd49b.jpeg", "language": "en", "followers": "18" }}}}

10. Use the YQL Console - http://developer.yahoo.com/yql/console/

12. Selecting specific fields (also Followers API) select name from meme.followers where owner_guid = “NKADUBBZPUQQG6GF6AHTDTABSQ” <results> <meme> <name>herry</name> </meme> <meme> <name>grahamhills</name> </meme> <meme> <name>fizzycitrus</name> </meme> </results>

13. Sub-select and Limits select name from meme.followers where owner_guid in (select guid from meme.info where name='shreeni’) limit 2 <results> <meme> <name>herry</name> </meme> <meme> <name>grahamhills</name> </meme> </results>

14. Functions select name from meme.followers where owner_guid in (select guid from meme.info where name='shreeni') | sort(field="name", descending="true”)

15. Functions Sort Tail Truncate Reverse unique Sanitize

16. Following API inmim select name from meme.following where owner_guid in (select guid from meme.info where name='bangwinissimo')

17. Searching for people select guid, name, title, language from meme.people where query="Fajar” select guid, name, title, language from meme.people where query="Fajar" and language=”id"

18. Finding specific Posts of amimuser select * from meme.posts where owner_guid in (select guid from meme.info where name='bangwinissimo') select * from meme.posts where owner_guid in (select guid from meme.info where name='bangwinissimo') and type='text'

19. Popular Posts select * from meme.popular select * from meme.popular where locale="id"

20. Search inmim SELECT * FROM meme.search WHERE query="jakarta”

21. Inserting/Deletingmimposts INSERT INTO meme.user.posts (type, content) VALUES ("text", "This is a text post from YQL!”) DELETE FROM meme.user.posts where pubid = "Nswwwmv"

22. Reposting, Commenting INSERT INTO meme.user.posts (guid, pubid, comment) VALUES ("S5R44PGJRBLKNEE5GYSRQPTXLQ", "rGCOBCK", "this is the repost comment”) INSERT INTO meme.user.comments (guid, pubid, comment) VALUES ("S5R44PGJRBLKNEE5GYSRQPTXLQ", "rGCOBCK", "meme rocks")

23. YQL Cheat Sheet http://bit.ly/yql-cheat-sheet

24. Exposing own API through YQL <?xml version="1.0" encoding="UTF-8"?> <table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta> <sampleQuery>select * from {table} where query=’q'</sampleQuery> </meta> <bindings> <select itemPath="results" produces="JSON" > <urls> <url env="all">http://query-url</url> </urls> <inputs> <key id=”q" type="xs:string" paramType="query" required="true" /> </inputs> </select> </bindings> </table>

25. Now access it through YQL USE "http://definition-file.xml" AS mytable; SELECT * FROM mytable WHERE query="whatever”

27. Earthtoolsapi for sunrise-sunset information

28. XML based api

29. Needs latitude-longitude of the location

30. Yahoo Geo API to convert location to latitute-longitude

31. Would need 2 different API calls and effort from your side

33. Querying for the data # Get the Lat Long information for Jakarta select * from geo.places where text="Jakarta" limit 1; # Now get the sunrise/sunset from earthtools using a # YQL query USE "http://rahukalamcalculator.appspot.com/yql/earthtools-definition.xml" AS earthtools; SELECT morning, evening FROM earthtoolsWHERE lat="1.365580" and lon="103.827713" and day="21" and month="11”

34. Combine the queries # One awesome call! select * from mytable where (lat,lon) in (select centroid.latitude, centroid.longitude from geo.places where text="jakarta") and day="21" and month="11”

36. Expressed business logic in Query – readable, maintainable

37. Used server side for the actual join

38. Less latency

40. Better data shaping and parsing

41. Better support for calling external Web service

42. Better support for adding, modifying, and deleting data using external Web services

45. Retention Limit: Records not read, updated, or executed at least once every thirty days may be removed.

46. Record Format: Records must be in a text-based format. Examples include JavaScript code, XML files, Open Data Tables, or YQL environment files.

48. Querying from hosted storage # Uses select-id select * from yql.storage where name="store://08fd2c74” # Uses update-id delete from yql.storage where name="store://3cc85a99” update yql.storage set value="new value" where name="store://3cc85a99” # Use contents as env file (uses execute-id) use "store://35ad2c72" as mytable; select * from mytable; # Use contents as JS for server side execute (uses execute-id) y.include('store://35ad2c72'); response.object = <success>{success}</success>;

50. Allows standardization of APIs across the web

51. Familiar and concise language for expressing business and data logic

52. Powerful tool to build mashups

53. You can build upon existing APIs and expose third party APIs

56. shreeni@yahoo-inc.com

57. http://tech.shreeni.info