Today Yahoo! announced that it is acquiring Tumblr . This marks a revival of Yahoo’s efforts to get into the social space. This inspired me to look back on the history of Yahoo’s social efforts. The following is listed in chronological order by when Yahoo! acquired/launched the property:
Flickr (March 2005 to Present)
Yahoo! acquired Flickr to get into the photo sharing business, and Flickr later replaced Yahoo! Photos as it did not make sense to have two Photos properties for Yahoo!. Flickr is still going strong today, ranked as the 82nd most popular website in the world according to Alexa.
Here’s the list of top 25 influencers in the field of business intelligence. The ranking is based on Klout score. We used the Klout’s top business intelligence influencers as the starting point, and we checked the top influencers for these accounts (sometimes going out to multiple levels) to arrive at the list below.
1. MicroStrategy @microstrategy
Klout Score 79
Business Intelligence and Mobile Intelligence Software. For better, faster business decisions.
2. Mico Yuk @MicoYuk
Klout Score 66
Founder http://BIDashboardFormula.com &http://EverythingXcelsius.com, Entrepreneur, BI Influencer, Global Speaker, #dataviz Geek, #BIDF Coach, #Xcelsius Guru.
Here is the browser market share for April 2013, based on traffic to my top site (number in parentheses shows change from March 2013):
Google Chrome: 39.37% (+0.53%)
IE: 29.73% (+0.16%)
Firefox: 24.57% (-0.45%)
Safari: 3.55% (-0.11%)
Opera: 1.11% (-0.01%)
Here is the browser market share for March 2013, based on traffic to my top site (number in parentheses shows change from February 2013):
Google Chrome: 38.84% (+1.42%)
IE: 29.57% (-0.82%)
Firefox: 25.02% (-0.93%)
Safari: 3.66% (+0.16%)
Opera: 1.12% (+0.01%)
Here is the browser market share for February 2013, based on traffic to my top site (number in parentheses shows change from January 2013):
Google Chrome: 37.42% (+0.33%)
IE: 30.39% (-0.51%)
Firefox: 25.95% (-0.23%)
Safari: 3.50% (+0.51%)
Opera: 1.11% (-0.12%)
In database design, it is a good practice to have a primary key for each table. There are two ways to specify a primary key: The first is to use part of the data as the primary key. For example, a table that includes information on employees may use Social Security Number as the primary key. This type of key is called a natural key. The second is to use a new field with artificially-generated values whose sole purpose is to be used as a primary key. This is called a surrogate key.
A surrogate key has the following characteristics:
Here is the browser market share for January 2013, based on traffic to my top site (number in parentheses shows change from December 2012):
Google Chrome: 37.09% (-0.71%)
IE: 30.90% (+1.18%)
Firefox: 26.18% (-0.19%)
Safari: 2.99% (-0.08%)
Opera: 1.23% (-0.18%)
Composite key, or composite primary key, refers to cases where more than one column is used to specify the primary key of a table. In such cases, all foreign keys will also need to include all the columns in the composite key. Note that the columns that make up a composite key can be of different data types.
Below is the SQL syntax for specifying a composite key: