How to Correctly Compare Dates in MySQL Using BETWEEN and DATE_ADD?

Correct date comparison in MySQL: using BETWEEN and DATE_ADD

Users may encounter the error "There is an error in your SQL syntax..." when using the CONVERT function to compare dates in a DATETIME column to a specific range. In order to solve this problem and perform date comparison correctly, the following points should be considered:

Database Column Format: The CONVERT function is used to convert values ​​to different data types. In this case, the purpose is to compare only the date part, without the time part. However, it is not recommended to use the CONVERT function for this purpose. Date and time functions should be used instead.

Correct syntax: To compare dates, use the BETWEEN operator. It is important to enclose the date string in single quotes ('') and use the correct date format. Also, make sure the start and end dates are in a logical order.

An example query that should work:

<code class="language-sql">SELECT * 
FROM `players` 
WHERE 
    us_reg_date BETWEEN '2000-07-05' 
AND 
    DATE_ADD('2011-11-10', INTERVAL 1 DAY)</code>

DATE_ADD Function: The DATE_ADD function is used to add or subtract a specified number of days, months or years from a given date. In this query, it is used to exclude the end date ('2011-11-10') from the comparison, as this may cause rows with dates exactly equal to '2011-11-10' to be missed.

By using the BETWEEN operator and the DATE_ADD function, you can effectively avoid SQL syntax errors and accurately compare date ranges in MySQL databases. Remember, it's crucial to use the correct date format and single quotes.

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