Merge pull request #86 from acabunoc/gh-pages

Add some motivation text

motivation.md

@@ -6,7 +6,17 @@ subtitle: Motivation
 
 ## Why use SQL and Databases?
 
-Handling complex or large-volume data can outstrip the capabilities of spreadsheets or plain text files.
+Three common options for storage are text files, spreadsheets, and databases. Text files are easiest to create, and work well with version control, but then we would have to build search and analysis tools ourselves. Spreadsheets are good for doing simple analyses, but they don’t handle large or complex data sets well. Databases, however, include powerful tools for search and analysis, and can handle large, complex data sets. These lessons will show how to use a database to explore the expeditions’ data.
+
+## The Problem
+
+We want to store information in a way that will make search and analysis easy.
+
+## Databases
+
+> ### database (dā'tə-bās') noun {.callout}
+> "A collection of data arranged for ease and speed of search and retrieval by a computer"
+> - The American Heritage® Science Dictionary
 
 ## Next Steps