Question

I have a table containing records with DateTime datatype in MySQL (e.g. 2013-01-17 21:16:06),
while on my entity I choose LocalDateTime datatype for the date field. During my queries I would like to retrieve all records based on 2 Dates only (fromDate and toDate using a datepicker). Lets say I choose the same date for both fromDate and toDate, the issue is both value would be the same since the time is 00:00:00, hence gives no result from the database.

I am curious if I have used the right datatype from Joda. Am I required to adjust the time for both values lets say 00:00:00 for fromDate and 23:59:59 for toDate ? Or what’s the better approach ?

Answer 1

Given a datetime column and two arbitrary dates as input, you can write:

SELECT * FROM `table`
WHERE `datetime` >= @startDate
AND   `dateTime` <  @endDate + INTERVAL 1 DAY

Where:

• startDate is the starting date, inclusive
• endDate is the ending date, exclusive

What the above means is best explained through the following cases:

1. To see all records for 2013-01-17 (one day) startDate should be 2013-01-17 and endDate should be 2013-01-17
2. To see all records for 2013-01-17 – 2013-01-18 (two days) startDate should be 2013-01-17 and endDate should be 2013-01-18.

This makes choosing the dates intuitive. The < sign ensures that the calculated end date is excluded from the results (e.g. in the first case the query omits `2013-01-18 00:00:00 records).