PostgreSQL views make it easy to query and analyze database. Here’s how to create view in PostgreSQL using PostgreSQL create view.

# PostgreSQL

## How to Get First Row Per Group in PostgreSQL

Sometimes you may need to get first record per group in PostgreSQL. Here’s how to get first row per group in PostgreSQL.

## How to Get Row Number in PostgreSQL

PostgreSQL allows you to get specific row id for your table. Here’s how to get row number in PostgreSQL using row_number window function.

## How to Calculate Percentile in PostgreSQL

Percentile calculation helps helps you in ranking data and calculating median. Here’s how to calculate percentile in PostgreSQL.

## How to Fill Missing Dates in PostgreSQL using generate_series

It is important to fill missing date values while plotting data on graphs. Here’s the SQL query to fill missing dates using PostgreSQL generate_series.

## How to Calculate Median in PostgreSQL

Median calculation helps find middle value and avoid data noise. Here’s how to calculate median in PostgreSQL.

## How to Calculate Moving Average in PostgreSQL

Rolling Average helps smoothen noise in data analysis. Here’s how to calculate moving average in PostgreSQL using SQL query.

## How To Import CSV File in PostgreSQL

Sometimes you may need to import csv file into PostgreSQL table. Here’s how to import CSV file in PostgreSQL with header.

## How To Calculate Month over Month Growth in PostgreSQL

Month over Month Growth is a useful KPI metric. Here’s how to calculate month over month growth in PostgreSQL.

## How to Calculate Retention Rate in SQL?

Retention Rate is percent of users who return to use a product/service over a period of time. Here’s how to calculate retention rate in SQL. Calculate retention rate in MySQL, PostgreSQL.