Erik EldridgeSlideshare.net/erikeldridge

Yahoo!Kimo Introduction to the Yahoo! Query Language

Presentation structure

• Yahoo! Query Language (YQL) overview

• The YQL Console

• YQL Open Tables

• Examples of YQL usage

YQL = Yahoo! Query Language

• SQL-like syntax- SELECT {fields} from {table} WHERE {key} = {value}- SELECT * FROM flickr.photos.search WHERE text=" 臺北 101”- SELECT * FROM html where url=“http://www.wretch.cc/”- SELECT * FROM flickr.photos.search WHERE has_geo="true" and woe_id in

(SELECT woeid FROM geo.places WHERE text="taipei" LIMIT 1)

• Extensible access to APIs/data

• SELECT * FROM Internet

Presentation structure

• Yahoo! Query Language (YQL) overview

• The YQL Console

• YQL Open Tables

• Examples of YQL usage

The YQL statement to run

The YQL statement to run

Yahoo! starts us off w/ several pre-defined “tables”

Predefined YQL data tables

XML response from a public data requestPublic URLs do not require OAuth Raw XML output

Presentation structure

• Yahoo! Query Language (YQL) overview

• The YQL Console

• YQL Open Tables

• Examples of YQL usage

Anyone can create a table for yql. Seeing the community tables in the console

Now showing community tablesPulli

ng table

def

s fro

m d

atat

able

s.org

Anatomy of a simple table showing table url, base api endpoint, and input definitions

Tables can be very simple

Input d

efin

ition

Native YQL query

E4X

Using a custom table in the console

Specifying table w/ “use”

Transcript HTML output

All community tables in the console are open source and available in githubDefault behavior of the Yahoo! Weather table

Comm

unity ta

bles

shown in

YQL c

onsole

Hack idea:Plurk table

Presentation structure

• Yahoo! Query Language (YQL) overview

• The YQL Console

• YQL Open Tables

• Examples of YQL usage

YQL is great for mobile apps (1 request to yql for the heavy lifting results in faster apps). This app finds the locations of nearby bars:

YQL is g

reat

for m

obile a

pps

Search Flickr photos by celestial location

select * from flickr.photos.astro …

Thank You!

• Resources:- delicious.com/erikeldridge/

taiwanhackday09+presentation+yql

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Hack Ideas

• Plurk tables