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Learning Apache Cassandra

You're reading from   Learning Apache Cassandra Managing fault-tolerant, scalable data with high performance

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Product type Paperback
Published in Apr 2017
Publisher
ISBN-13 9781787127296
Length 360 pages
Edition 2nd Edition
Languages
Concepts
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Author (1):
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 Yarabarla Yarabarla
Author Profile Icon Yarabarla
Yarabarla
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Toc

Table of Contents (14) Chapters Close

1. Getting Up and Running with Cassandra FREE CHAPTER 2. The First Table 3. Organizing Related Data 4. Beyond Key-Value Lookup 5. Establishing Relationships 6. Denormalizing Data for Maximum Performance 7. Expanding Your Data Model 8. Collections, Tuples, and User-Defined Types 9. Aggregating Time-Series Data 10. How Cassandra Distributes Data 11. Cassandra Multi-Node Cluster 12. Application Development Using the Java Driver 13. Peeking under the Hood 14. Authentication and Authorization

Working with status updates


Now that we've got our status updates table ready, let's create our first status update:

INSERT INTO "user_status_updates" 
("username", "id", "body") 
VALUES ( 
  'alice', 
  76e7a4d0-e796-11e3-90ce-5f98e903bf02, 
  'Learning Cassandra!' 
);

This will look pretty familiar; we specify the table we want to insert data into, the list of columns we're going to provide data for, and the values for these columns in the given order.

Let's give bob a status update too by inserting the following row in the user_status_updates table:

INSERT INTO "user_status_updates" 
("username", "id", "body") 
VALUES ( 
  'bob', 
  97719c50-e797-11e3-90ce-5f98e903bf02, 
  'Eating a tasty sandwich.' 
);

Now we have two rows, each identified by the combination of the username and id columns. Let's take a look at the contents of our table using the following SELECT statement:

SELECT * FROM "user_status_updates";

We'll be able to see the two rows that we inserted, as follows:

Note that, as we saw...

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