Drop "postgres" arg (thanks PGDATABASE)

README.md

@@ -4,14 +4,14 @@
 
 ---
 
-## Standalone sub-projects
+## Standalone subprojects
 
-This repository illustrates different concepts, patterns and examples via standalone sub-projects. Each sub-project is
-completely independent of the others and do not depend on the root project. This _standalone sub-project constraint_
-forces the sub-projects to be complete and maximizes the reader's chances of successfully running, understanding, and
+This repository illustrates different concepts, patterns and examples via standalone subprojects. Each subproject is
+completely independent of the others and do not depend on the root project. This _standalone subproject constraint_
+forces the subprojects to be complete and maximizes the reader's chances of successfully running, understanding, and
 re-using the code.
 
-The sub-projects include:
+The subprojects include:
 
 ### `arrays/`
 
@@ -48,9 +48,9 @@ Generate test data to aid in performance exploration and analysis.
 See the README in [test-data/](test-data/).
 
 
-## WishList
+## Wish List
 
 General clean-ups, TODOs and things I wish to implement for this project:
 
-* DONE Explore Postgres without Docker. I'd like to learn the basics of `pg_ctl` so I don't need to depend on Docker to run
+* [x] DONE Explore Postgres without Docker. I'd like to learn the basics of `pg_ctl` so I don't need to depend on Docker to run
   Postgres (although Docker is super convenient!) 

arrays/README.md

@@ -14,11 +14,11 @@ Follow these instructions to explore arrays in Postgres.
       name will differ so take care to adjust the `psql` commands accordingly. 
 2. Apply the schema:
     * ```shell
-      psql postgres -f observations-schema.ddl
+      psql -f observations-schema.ddl
       ```
 3. Insert test data:
     * ```shell
-      psql postgres -f observations-data.sql
+      psql -f observations-data.sql
       ```
 4. Try out the queries in `observations-explore.sql` and learn about SQL arrays!
     * For example, execute the `observations-ad-hoc-query.sh` with the following command.

arrays/observations-ad-hoc-query.sh

@@ -2,6 +2,6 @@
 # Execute an ad hoc query from a shell script against the Postgres database.
 # Specifically, we want to see if we can use a heredoc to define the query.
 
-psql postgres << EOF
+psql << EOF
 select format('"%s"', description), array_length(notes, 1) from observations
 EOF

arrays/observations-export.sh

@@ -5,5 +5,5 @@
 # References used:
 #  * https://www.postgresql.org/docs/13/functions-string.html
 
-psql postgres \
+psql \
 -c "\copy (select description, concat_ws(';', variadic notes) from observations) to stdout;"

lag/README.md

@@ -14,11 +14,11 @@ Follow these instructions to explore the windowing feature in Postgres.
       name will differ so take care to adjust the `psql` commands accordingly.
 2. Apply the schema: 
     * ```shell
-      psql postgres -f snapshots-schema.ddl
+      psql -f snapshots-schema.ddl
       ```
 3. Insert test data:
     * ```shell
-      psql postgres -f snapshots-data.sql
+      psql -f snapshots-data.sql
       ```
 4. Try out the queries `snapshots-explore.sql` and learn about `lag`!