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MariaDB Cookbook

MariaDB Cookbook

By : Daniel Bartholomew
4.2 (9)
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MariaDB Cookbook

MariaDB Cookbook

4.2 (9)
By: Daniel Bartholomew

Overview of this book

Table of Contents (20 chapters)
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MariaDB Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Using microseconds in the DATETIME columns


There was a time when measuring dates and times accurately to within a single second were as precise as we needed it to be. However, those days are gone. Users expect their apps to have response times of well under a second, and so our databases must be able to track those times as well.

How to do it...

  1. Launch the mysql command-line client application and connect it to our MariaDB server.

  2. Create a test database if it doesn't already exist and switch to it using the following command:

    CREATE DATABASE IF NOT EXISTS test;
    USE test;
    
  3. Create a simple two-column table named times using the following command:

    CREATE TABLE times (
      id int NOT NULL AUTO_INCREMENT,
      dt datetime(6),
      PRIMARY KEY (id)
    );
    
  4. Run the following INSERT statements at least four times and add some sample data to our table using the following command:

    INSERT INTO times (dt) VALUES (NOW()), (NOW(6));
    
  5. Select all of the data from our table with the following SELECT command:

    SELECT * FROM...

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