add psql til

ronthetech · ronthetech · commit bcabfa2c31ef · 2022-12-20T23:46:21.000-05:00
diff --git a/README.md b/README.md
@@ -82,6 +82,7 @@ To read more of my writing about programming and technology, [check out my blog]
 ### PostgreSQL
 
 * [](postgresql/#.md)
+* [How to Check Inequality](postgresql/check-inequality.md)
 * [Count How Many Records Are In Each Category](postgresql/count-how-many-records-in-each-category.md)
 
 ### Python
