Why Does My SQLite Date Range Query Using BETWEEN Return All Dates?

Troubleshooting SQLite Date Range Queries

A common SQLite query issue involves using the BETWEEN operator with dates in "MM/DD/YYYY" format, unexpectedly returning all dates instead of the desired range.

The Problem: Incorrect Date Formatting

SQLite requires dates to be formatted as "YYYY-MM-DD". If your database or query uses a different format (like "MM/DD/YYYY"), SQLite treats the dates as strings, leading to incorrect results—often selecting every date in the table.

The Solution: Consistent Date Formatting

The fix is straightforward: ensure consistent "YYYY-MM-DD" formatting for all dates. You can achieve this in two ways:

1. Database Modification: Use the strftime('%Y-%m-%d', date_column) function to update your database column to the correct format.

2. Query Modification: Modify your SQL query to use the correct format directly. For instance:

<code class="language-sql">SELECT * FROM test WHERE date BETWEEN '2011-11-01' AND '2011-11-08';</code>

By using the correct date format, your BETWEEN clause will function as expected, accurately selecting only the dates within your specified range.

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