Week 2 notes completed

CM3010 Databases and Advanced Data Techniques/Week 2/Week 2 Notes.md

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+# What shape is your data?
+## Sorts of structure
+* Structures in programming environments
+* Structures in data models
+* Structures in serializations (data formats)
+* Structures in exchange protocols
+* Structures in user interfaces
+
+## Shapes available
+* Tables
+* Trees
+* Graphs
+* Media (raw data)
+* Documents/objects
+
+# Tables
+## What does a table look like?
+A table can be seen as a collection of cells where each _row_ represents a thing and each column represents a type of information about the thing.
+
+A strength of a table is that it's easy to understand, search and communicate meaning.
+
+However, conveying hierarchy cannot be done.
+
+# Trees
+They have only one parent node instead of two in family trees.
+The root node is represented at the top in diagrams.
+
+# Other
+Tree nodes can only have one parent at the most. However, when there start to be more parents for a node, we're now talking about a graph.
+
+Tables: General-purpose
+Trees: Heterogeneous and hierarchical, structured data
+Graphs: Heterogeneous, non-hierarchical, structured data
+Blobs: Inaccessible data for storage
+Features: Searchable information derived from blobs
+Documents: Rich, but not interrelated data
+
+# Summary
+* Where does your data come from?
+* How well does it fit your needs?
+* How is it structured?
+* How well can it be integrated?
+* How should your data be structured?
+* How will you use yoru data?
+* Will others use your data?