Add redirect from PSQL to PostgreSQL and improve PostgreSQL

postgresql.md

@@ -1,25 +1,39 @@
 ---
 title: PostgreSQL
-category: Databases
 layout: 2017/sheet
+
+category: Databases
+updated: 2024-01-15
+intro: |
+ PostgreSQL is a powerful, open source object-relational database system.
+ It provides the `psql` command line tool for interacting with its database.
 ---
 
-### Console
+### Create Database
+
+```shell
+createdb <databasename>
+```
 
- $ psql #logs in to default database & default user
- $ sudo -u <rolename:postgres> psql #logs in with a particular user
+### Query Database
 
-Replace anything within `<placeholder>` accordingly
+```shell
+psql --no-align --tuples-only --command="SELECT * FROM <table>" # Useful for scripting
+psql -Atc "SELECT * FROM <table>" # short version of above
+```
 
-### Commands
+### Login to Database
 
- * Show roles: `\du`
- * Show tables: `\dt`
- * Show databases: `\l`
- * Connect to a database: `\c <database>`
- * Show columns of a table: `\d <table>` or `\d+ <table>`
- * Quit: `\q`
+```shell
+psql # logs in to default database & default user
+sudo -u <rolename:postgres> psql # logs in with a particular user
+```
 
-### Creating database
+#### Commands
 
- $ createdb databasename
+* Show roles: `\du`
+* Show tables: `\dt`
+* Show databases: `\l`
+* Connect to a database: `\c <database>`
+* Show columns of a table: `\d <table>` or `\d+ <table>`
+* Quit: `\q`

psql.md

@@ -0,0 +1,6 @@
+# redirect to postgresql.md
+---
+title: PSQL
+category: Hidden
+redirect_to: /postgresql.md
+---