Why Does My SQLite Query Return All Dates Despite Using a BETWEEN Clause?

Why does SQLite query ignore date range conditions?

Problem description:

When querying records within a specific date range using an SQLite database, the results contain all dates, even those outside the specified range. The query statement used is as follows:

SELECT * FROM test WHERE date BETWEEN "11/1/2011" AND "11/8/2011";

Cause of the problem:

The problem is the date format. SQLite requires dates in YYYY-MM-DD format (for example, "2011-11-01" through "2011-11-08"). However, the date format provided in the query is "MM/DD/YYYY".

When executing a query, SQLite interprets date strings as text instead of dates. Therefore, it ignores the date condition and retrieves all rows in the "test" table regardless of the actual date value.

Solution:

To resolve this issue, convert the date string to YYYY-MM-DD format:

SELECT * FROM test WHERE date BETWEEN "2011-11-01" AND "2011-11-08";

By using the correct date format, SQLite can correctly evaluate the condition and limit the results to records within the specified date range.

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