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Developing Modern Database Applications with PostgreSQL

You're reading from  Developing Modern Database Applications with PostgreSQL

Product type Book
Published in Aug 2021
Publisher Packt
ISBN-13 9781838648145
Pages 440 pages
Edition 1st Edition
Languages
Authors (2):
Dr. Quan Ha Le Dr. Quan Ha Le
Profile icon Dr. Quan Ha Le
Marcelo Diaz Marcelo Diaz
Profile icon Marcelo Diaz
View More author details

Table of Contents (17) Chapters

Preface 1. Section 1 - Introducing PostgreSQL Development and Administration
2. Introduction to PostgreSQL Development and Administration 3. Section 2 - Development in PostgreSQL
4. Setting Up a PostgreSQL RDS for ATMs 5. Using PostgreSQL and Node.js for Banking Transactions 6. Managing Bank ATM Locations Using PostgreSQL and Django 7. Creating a Geospatial Database Using PostGIS and PostgreSQL 8. Managing Banking Transactions using PostgREST 9. Section 3 - Administration in PostgreSQL
10. PostgreSQL with DevOps for Continuous Delivery 11. PostgreSQL High Availability Clusters 12. High-Performance Team Dashboards Using PostgreSQL and New Relic 13. Testing the Performance of Our Banking App with PGBench and JMeter 14. Test Frameworks for PostgreSQL 15. Other Books You May Enjoy APPENDIX - PostgreSQL among the Other Current Clouds

Ordering ATM locations by distance from the Brooklyn Bridge

The steps for this are as follows:

  1. We will use latitude 40.709677 and longitude -74.00365 for the Brooklyn Bridge in the following SQL statement:
SELECT atm."BankName", atm."Address"
FROM "ATM coordinates" atm
ORDER BY geog <-> ST_SetSRID(ST_MakePoint(-74.00365, 40.709677), 4326);

The result of the preceding query is shown in the following screenshot: 

Figure 5.21 – The ATM machines ordered by proximity to the Brooklyn Bridge
  1. You can change the location from the Brooklyn Bridge to any other location to test your SELECT query; for instance, you could use New York City Hall (the latitude and longitude coordinates are 40.712772, -74.006058), the Rockefeller Center (latitude 40.758740, longitude -73.978674), and the Metropolitan Museum of Art (latitude 40.778965, longitude -73.962311).
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