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Clojure Web Development Essentials

You're reading from   Clojure Web Development Essentials Develop your own web application with the effective use of the Clojure programming language

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Product type Paperback
Published in Feb 2015
Publisher
ISBN-13 9781784392222
Length 232 pages
Edition 1st Edition
Languages
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Author (1):
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Ryan Baldwin Ryan Baldwin
Author Profile Icon Ryan Baldwin
Ryan Baldwin
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Table of Contents (14) Chapters Close

Preface 1. Getting Started with Luminus 2. Ring and the Ring Server FREE CHAPTER 3. Logging 4. URL Routing and Template Rendering 5. Handling Form Input 6. Testing in Clojure 7. Getting Started with the Database 8. Reading Data from the Database 9. Database Transactions 10. Sessions and Cookies 11. Environment Configuration and Deployment A. Using Korma – a Clojure DSL for SQL Index

Fetching albums from the database


In Chapter 7, Getting Started with the Database, we were introduced to YeSQL for interacting with our database. We used YeSQL to create an INSERT statement which added our new users to the database. Similarly, we can use YeSQL to SELECT records from the database. If you can do it in SQL, you can do it with YeSQL. And that's the beauty of YeSQL: it's just SQL. This allows us to open an SQL tool of our choice and experiment with our query until we get it right.

Writing the SQL query

For this next bit, we'll use the psql tool to verify our SQL. But you're free to use whatever SQL editor you have at your disposal. Take the following steps:

  1. Launch psql and connect to our database:

    # psql -U hipstr -d postgres -h localhost
    
  2. We can write our query at the PostgreSQL prompt. Any valid SQL is accepted at the prompt; we just need to terminate it with a semi-colon (;). Our feature wants to show a list of albums, the artist/s, and the release dates of those albums, all ordered...

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