Selecting data from database based on date

Question

hope you fine and well,

i have a table that contains persons information and i have a registration date column in the table, i want to to fetch the registered people in specific date.

to be more specific i want to enter some date in html input then to select from database based on this date.

i tried two solutions but they failed actually:

1. by entering the full date : this will work just with full date, for example if i entered 2016-1-1 i will get the results of this date, but if i want to return all the people who registered in 2016-1 or 2016 my query will fail since these values are not equal the dates in the table !

2. using regular expression, its okay but it will fail again ! if i entered 2016-1 for example , the query will return the results of 2016-11 also !

so any ideas ?! or any better regular expressions ?!

regards.

Answer 1

Best solution would be to do it in the query, in my opinion at least.

So you want all users from 2016?

SELECT * FROM `users` WHERE year(`date_field`) = '2016'; 
// Where 'date_field' is the name of your date field

Or 2016/01 would be:

SELECT * FROM `users` WHERE year_month(`date_field`) = '2016-01'; 
// Where 'date_field' is the name of your date field#

Or you could use this for 2016/01:

SELECT * FROM `users` WHERE year(`date_field`) = '2016' AND month(`date_field`) = '01'; 
// Where 'date_field' is the name of your date field

For a full list of MySql date functions check out the documentation .

Answer 2

I would like to add that you can also query for results between certain dates.

What i often end up doing is:

// For a certain month or period
SELECT *
FROM users
WHERE date_field >= '2016-01-01'
AND date_field <= '2016-02-01';

// For a whole year
SELECT *
FROM users
WHERE date_field >= '2016-01-01';