The document provides an overview of Yahoo's Query Language (YQL), including its query structure, commands for running queries, and examples for inserting, updating, and deleting data. It details available tables and how to create user aliases, as well as defining open data tables and extending them. Additionally, it emphasizes building applications faster and provides links to relevant documentation and resources.

1. 1Jonathan LeBlanc – Technology EvangelistYahoo! Developer NetworkTwitter: @jcleblanc

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3. 3YQL Query StructureSELECT * FROM Internet

4. 4YQL Test ConsoleAvailable At: http://developer.yahoo.com/yql/console

5. 5Running Queries - SELECT Query StructureSELECTmyColumn, myTitleFROM myTable(0, 50)WHEREmyColumn = 'value' ANDmyTitle = 'title‘LIMIT3 OFFSET 10 |sort(field='myColumn') | reverse()

6. 6Running Queries - INSERT / UPDATE / DELETEModify Data on the InternetCreate Tweets, Add Blog Entries, Update DatabasesCurrent Tables Using I/U/DTwitter Status, bit.ly URL Shortner, Yahoo! Profile Status / Update Stream, Amazon SimpleDB

7. 7Running Queries - INSERT Query StructureINSERT INTObitly.shorten (login, apiKey, longUrl) VALUES (’ME', 'API_KEY', 'http://yahoo.com')

8. 8Running Queries - UPDATE Query StructureUPDATE social.profile.statusSET status="Using YQL UPDATE" WHEREguid=“NJFIDHVPVVISDXZKT7UKED2WHU”

9. 9Running Queries - DELETE Query StructureDELETE FROM twittertableWHERE tweetid="12345" AND username="twitter_username" AND password="twitter_password

10. 10Running Queries – Sub-selects with the IN clauseSELECT * FROM flickr.photos.searchWHERE (lat, lon) IN (SELECT centroid.latitude, centroid.longitude FROM geo.places WHERE text="SFO")

11. 11Running Queries – Available TablesYQL Command: SHOW TablesNumber of Standard Tables: 113Number of Community Tables: 610Total Number of Tables: 723Contribute Tables to: http://www.github.com/yql/yql-tables/

12. 12Running Queries – Table SyntaxYQL Command: DESC tablename

13. Running Queries – URL Formathttp://query.yahooapis.com/v1/yql?[params]http://query.yahooapis.com/v1/public/yql?[params]Paramsq=[QUERY]format=[XML / JSON] diagnostics=[true / false]debug=[true / false]env=[.env file link]callback=[function name]13

14. 14Running Queries – URL Formathttp://query.yahooapis.com/v1/yql?[params]http://query.yahooapis.com/v1/public/yql?[params]Paramsq=[QUERY]

15. format=[XML / JSON / JSONP / JSONP-X]

16. diagnostics=[true / false]

17. debug=[true / false]

18. env=[.env file link]

19. callback=[function name]15Query Aliasing – Creating Your Aliashttp://queries.yahooapis.com/v1/public/yql/[user_alias]/[query_alias]Create Your User AliasINSERT INTO yql.queries (alias) VALUES (”jcleblanc")Insert a new Query AliasINSERT INTO yql.queries.query (name, query) VALUES ("weather", ”SELECT * FROM weather.forecast WHERE location=90210")

20. 16YQL Open Data TablesWrap Your Own API or Data Source

21. 17Open Data Tables – XML File Syntax<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings></bindings></table>

22. 18Open Data Tables – XML File Syntax<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings></bindings></table>

23. 19Open Data Tables – XML File Syntax<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta> <author>Jonathan LeBlanc</author> <description>My Table</description> <documentationURL>www.site.com</documentationURL> <sampleQuery>SELECT * FROM {table} </sampleQuery> </meta> <bindings></bindings></table>

24. 20Open Data Tables – XML File Syntax<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings></bindings></table>

25. 21Open Data Tables – XML File Syntax<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings><select itemPath="" produces="XML" > <urls> <urlenv="all”>http://www.site.com/{user}</url> </urls> <inputs> <key id="user" type="xs:string" paramType="path" required="true" /> </inputs> </select> </bindings></table>

26. 22Open Data Tables – Invoking a Table DefinitionThe USE clauseUSE 'http://github.com/yql/yql-tables/raw/master/google/google.buzz.updates.xml'AS buzz.updates; SELECT * FROM buzz.updatesWHERE user='nakedtechnologist'

27. 23Open Data Tables – .env Fileshttp://datatables.org/alltables.envUSE 'http://www.datatables.org/amazon/amazon.ecs.xml' AS amazon.ecs;USE 'http://www.datatables.org/bitly/bit.ly.shorten.xml' AS bit.ly.shorten;USE 'http://www.datatables.org/dopplr/dopplr.auth.xml' AS dopplr.auth;USE 'http://www.datatables.org/dopplr/dopplr.city.info.xml' AS dopplr.city.info;

28. Google Buzz TableAvailable At: http://github.com/yql/yql-tables

29. 25YQL ExecuteExtending Open Data Tables

30. 26YQL Execute – XML File SyntaxAugment datacity / state to APIs that just return zip codeCreate APIs from web pagescelebrity birthdays scraped from IMDBData Transformationsconvert the results from xml to Google's kml formatMove business logic of your application to the cloud

31. 27YQL Execute – XML File Syntax<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings><select itemPath="" produces="XML" > <urls></urls> <inputs></inputs> </select> </bindings></table>

32. 28YQL Execute – XML File Syntax<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings><select itemPath="" produces="XML" > <urls></urls> <inputs></inputs><execute></execute> </select> </bindings></table>

33. Global Disaster Alert and Coordination System TableAvailable At: http://github.com/yql/yql-tables

34. 30ConclusionBuild applications faster(and that run faster)

35. This Presentation http://www.slideshare.net/jcleblanc/yql-overviewYQL Documentationhttp://developer.yahoo.com/yqlYQL Consolehttp://developer.yahoo.com/yql/consoleYQL Github Account (Contribute Tables)http://github.com/yql/yql-tables

36. 32Thank YouQuestions?