Comparing dates in MySQL ignoring time portion of a DateTime field

问题

I need to compare dates in MySQL ignoring the time portion in a DateTime column. I have tried the following SQL.

SELECT * FROM order_table where order_date=date_format('2012-05-03', '%Y-%m-%d');

It doesn't retrieve any row even though there is a date 2012-05-03 10:16:46 in MySQL table. How can the time portion in the DateTime field be ignored while comparing dates in MySQL?

回答1:

You could use the DATE function:

SELECT col1, col2, ..., coln
FROM order_table
WHERE date(order_date) = '2012-05-03'

But this is more efficient, if your table is large and you have an index on order date:

SELECT col1, col2, ..., coln
FROM order_table
WHERE order_date >= '2012-05-03'
AND order_date < '2012-05-04'

回答2:

If you want to pass in a date then you can try something like this:

where YEAR(order_date)='2012' AND MONTH(order_date)='05' AND DAY(order_date)='03'

You can look at this for more functions.

回答3:

@Mark has got the good approach but just be careful that you will always have to calculate and find next day in that case. If you want to avoid that and still ignore time you could do following:

WHERE order_date >= '2012-05-27 00:00:00' AND order_date <= '2012-05-27 23:59:59'

I hope this makes sense.

回答4:

SELECT * FROM order_table WHERE date(order_date) = '2012-05-03';

回答5:

Maybe, you can use function like date(). But in this case speed can be decreased, because index cannot be using. So, I recommend to use

SELECT * FROM order_table 
WHERE order_date between('2012-05-03 0:0:0' and '2012-05-03 23:59:59')

回答6:

This is bit old .... but a correct answer also is using the date_format at the column order_date like below:

SELECT * FROM order_table where date_format(order_date, '%Y-%m-%d')='2012-05-03';

回答7:

one of the following could be used when comparing dates in MySQL:

DATEDIFF() Subtract two dates
TIMEDIFF() Subtract time
TIMESTAMPDIFF() Subtract an interval from a datetime expression
PERIOD_DIFF()   Return the number of months between periods

for more on date functions MySQL documentation.

回答8:

In my case i had , DATE_FORMAT and CONVERT_TZ

The only one worked for me is this

DATE_FORMAT(CONVERT_TZ(`order_item`.created, '+0:00', '+2:00'), '%d/%m/%Y %H:%i') 

BETWEEN 
('12/02/2018 01:42') 
AND 
('12/02/2018 10:51')

来源：https://stackoverflow.com/questions/10776539/comparing-dates-in-mysql-ignoring-time-portion-of-a-datetime-field

标签

mysql

date

datetime

date-comparison