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content/notes/13-databases-1.md
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@ -32,8 +32,8 @@ specifiically *relational databases*
- datbase normalisation - datbase normalisation
- SQL - SQL
# ## relational vs nosql
relation is better for structured data, nosql is better for abstract data, as it is more flexible
# Data modelling # Data modelling
first step in designing database first step in designing database
@ -45,3 +45,6 @@ schema Defn: a collection of metadata that describes the logical view of a datab
noSQL databases are either schema-free or have relaxed schemas noSQL databases are either schema-free or have relaxed schemas
![example database schema|400](https://i.imgur.com/09ATkHZ.png)
## conceptual data modelling