added PostgreSQL pdf

Lukmanern · Oct 20, 2020 · 0fa37d4 · 0fa37d4
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diff --git a/README.md b/README.md
@@ -65,3 +65,4 @@
 1. [Puppet](pdf/puppet) lets you automate the enforcement, security, and delivery of your hybrid or cloud-native infrastructure.
 1. [Google Cloud Developer](pdf/GoogleCloudDeveloper.pdf) builds scalable and highly available applications using Google recommended practices and tools that leverage fully managed services.
 1. [AI, Neural Networks, Machine Learning, Deep Learning & Data Science](pdf/AI_ML.pdf) is intelligence demonstrated by machines.
+1. [PostgreSQL](pdf/PostgreSQL-Cheat-Sheet.pdf) is a free and open-source relational database management system (RDBMS) emphasizing extensibility and SQL compliance.
diff --git a/pdf/PostgreSQL-Cheat-Sheet.pdf b/pdf/PostgreSQL-Cheat-Sheet.pdf