Скачать или смотреть Inserting Random Values into MySQL Database Columns with Ease

Learn how to effortlessly insert random values into your MySQL database tables with this step-by-step guide. Perfect for filling in columns with random data!
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This video is based on the question https://stackoverflow.com/q/71514474/ asked by the user 'Cristian Octavian Manea' ( https://stackoverflow.com/u/18389886/ ) and on the answer https://stackoverflow.com/a/71514816/ provided by the user 'RF1991' ( https://stackoverflow.com/u/14799981/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Insert Random Values in MySQL Database Columns

In the world of database management, there are times when we need to bulk insert data into a table, but we want some of that data to be randomly generated. This can be particularly useful when populating fields that require varied entries, such as statistics or counts. For instance, you may find yourself in a situation where you want to insert records into a table but with some columns filled with random numbers within a specific range. Today, we’ll discuss how to achieve this within a MySQL database.

The Problem

Imagine you have a table named Chirurgie in your Spital database that you want to fill with data. You may already have information to pull from another table (personal), but you also need to insert random values for certain columns, specifically within a range of 0-10. The challenge is to write the SQL statement that accomplishes this.

Current Table Structure

Your current table structure for Chirurgie looks like this:

[[See Video to Reveal this Text or Code Snippet]]

You have a valid INSERT statement that pulls data from the personal table, but it does not address the need for random values. Here is the current insertion statement you are using:

[[See Video to Reveal this Text or Code Snippet]]

Now, let’s modify this to accommodate your needs.

The Solution

To create the desired random values for the columns Pacienti tratati, ID Produse, and Cantitate, you can utilize the RAND() function in MySQL combined with FLOOR(). The RAND() function will generate a random floating-point number between 0 and 1, which can then be scaled to fit your range. Here’s how you can achieve that:

Updated Insert Statement

Here’s the improved INSERT statement that includes random values in the required columns:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code

FLOOR(RAND() * 10): This expression generates a random integer from 0 to 9. By adding 1, it shifts the range to 1-10.

Pacienti tratati, ID Produse, Cantitate: These are the new columns in which you want to insert the random values. Each column will receive a random integer within the specified range each time the query runs.

Conclusion

Using this method, you can effectively insert not only data pulled from another table but also fill in additional columns with random values within your desired range. This is a powerful technique in data management, especially for testing or demonstration purposes.

Now you can keep your database populated with realistic but randomized testing data without much hassle. Happy coding!