feat: introduction and learning objectives

_includes/colophon.md

@@ -12,9 +12,11 @@ legibility was checked using [WebAIM WAVE][wave].
 Diagrams were created with the desktop version of [draw.io][draw-io].
 
 The colors in headings and to distinguish code samples
-are lightened versions of those used in classic Canadian postage stamps.
+are lightened versions of those used in
+[classic Canadian postage stamps][stamps].
 
 [atkinson]: https://brailleinstitute.org/freefont
 [draw-io]: https://www.drawio.com/
 [highlight-css]: https://numist.github.io/highlight-css/
+[stamps]: https://third-bit.com/colophon/
 [wave]: https://wave.webaim.org/

index.md

@@ -3,6 +3,39 @@ home: true
 ---
 <section class="aside" markdown="1">
 
+## introduction
+
+- [Intended audience][persona]
+ - Rachel has a master's degree in cell biology
+ and now works in a research hospital doing cell assays.
+ - She learned a bit of R in an undergrad biostatistics course
+ and has been through [the Carpentries lesson on the Unix shell][carpentries-shell].
+ - Rachel is thinking about becoming a data scientist
+ and would like to understand how data is stored and managed.
+ - Her work schedule is unpredictable and highly variable,
+ so she needs to be able to learn a bit at a time.
+- Prerequisites
+ - Basic Unix command line: `cd`, `ls`, `*` wildcard
+ - Basic tabular data analysis: filtering rows, aggregating within groups
+
+</section>
+<section class="aside" markdown="1">
+
+## learning outcomes
+
+1. Explain the difference between a database and a database manager.
+1. Write SQL to select, filter, sort, group, and aggregate data.
+1. Define tables and insert, update, and delete records.
+1. Describe different types of join and write queries that use them to combine data.
+1. Use windowing functions to operate on adjacent rows.
+1. Explain what transactions are and write queries that roll back when constraints are violated.
+1. Explain what triggers are and write SQL to create them.
+1. Manipulate JSON data using SQL.
+1. Interact with a database using Python directly, from a Jupyter notebook, and via an ORM.
+
+</section>
+<section class="aside" markdown="1">
+
 ## setup
 
 - Download [the latest release][release]
@@ -1433,9 +1466,11 @@ I would also like to thank the following for spotting issues, making suggestions
 
 [albrecht-andi]: http:https://andialbrecht.de/
 [art-postgresql]: https://theartofpostgresql.com/
+[carpentries-shell]: https://swcarpentry.github.io/shell-novice/
 [fontaine-dimitri]: https://tapoueh.org/
 [fossil]: https://fossil-scm.org/
 [mongodb]: https://www.mongodb.com/
+[persona]: http:https://teachtogether.tech/en/index.html#s:process-personas
 [postgresql]: https://www.postgresql.org/
 [release]: https://github.com/{{site.repository}}/raw/main/sql-tutorial.zip
 [sql]: https://en.wikipedia.org/wiki/SQL