How to Use % with Input Variables in a LIKE Query in SQLite

Learn how to properly format input variables with `%` for `LIKE` queries in SQLite, ensuring correct execution.
---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How do I use % with input variable in LIKE query, SQLite?

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Use % with Input Variables in a LIKE Query in SQLite

When working with databases, specifically SQLite, you might find the need to search for records that match specific patterns. One common method to achieve this is by using the LIKE statement, which allows for pattern matching. However, if you are trying to incorporate user inputs into these queries, you might stumble upon a formatting issue that prevents your query from executing correctly.

In this guide, we'll explore how to properly use the percent symbol (%) with input variables in a LIKE query to filter your database records effectively.

The Problem

In a recent inquiry, a user was attempting to execute a query to identify records based on how certain strings ended, specifically using a variable for input but was encountering issues with the format. The initial code looked something like this:

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

What Went Wrong?

The query failed because the way the input variable was incorporated into the LIKE string was incorrect. The intended pattern for matching needs proper formatting to allow SQLite to recognize the variable alongside the wildcard character %.

The Solution

The solution to the problem lies in correctly formatting the query string when incorporating variables. Below are the necessary steps to fix the issue:

1. Using f-strings for Formatting

Instead of attempting to concatenate strings incorrectly, we can use an f-string to combine the % wildcard and the user input appropriately.

2. Updated Code Example

Here is how the corrected implementation should look:

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

Key Changes Made:

The wildcard % is now correctly concatenated with the user input using an f-string, ensuring proper integration into the query.

The COUNT(Publisher) was removed in the example for simplicity, but you can certainly keep it if needed for your application requirements.

Conclusion

By following the corrected approach, you can leverage user inputs effectively with the LIKE query in SQLite. Remember that formatting is crucial when working with dynamic SQL to ensure your queries execute successfully.

With proper formatting, you can now utilize user inputs to tailor your searches within your database to find exactly what you're looking for!

Whether you're working on a small hobby project or a larger application, mastering such queries will enhance your database interactions significantly.

Feel free to share your experiences or ask any further questions below!