I wasn't able to find out (googling, reading mysql reference manual) how to get value of DATETIME in seconds in MySQL.
I dont mean to extract seconds from datetime, but to convert it into seconds.
If by "convert to seconds", you mean "convert to an UNIX Timestamp" (i.e. number of seconds since 1970-01-01), then you can use the UNIX_TIMESTAMP function :
select UNIX_TIMESTAMP(your_datetime_field)
from your_table
where ...
And, for the sake of completness, to convert from an Unix Timestamp to a datetime, you can use the FROM_UNIXTIME function.
If you want to have the difference between two DATETIME values, use TIMESTAMPDIFF:
TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2)
Returns datetime_expr2 – datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. One expression may be a date and the other a datetime; a date value is treated as a datetime having the time part '00:00:00' where necessary. The unit for the result (an integer) is given by the unit argument. The legal values for unit are the same as those listed in the description of the TIMESTAMPADD() function.
mysql> SELECT TIMESTAMPDIFF(MONTH,'2003-02-01','2003-05-01');
-> 3
mysql> SELECT TIMESTAMPDIFF(YEAR,'2002-05-01','2001-01-01');
-> -1
mysql> SELECT TIMESTAMPDIFF(MINUTE,'2003-02-01','2003-05-01 12:05:55');
-> 128885
unit can also be HOUR which is what you asked for in one of the comments.
The unit argument can be any of the following:
MICROSECOND
SECOND
MINUTE
HOUR
DAY
WEEK
MONTH
QUARTER
YEAR
The level of usefulness of some of the other options will of course be determined by the granularity of the data. For instance, "MICROSECOND" will only have limited use if you are not storing microseconds in your DATETIME values.
Use TIME_TO_SEC in previous versions for mysql
SELECT TIME_TO_SEC(time column) FROM table
i used in mysql
TO_SECONDS(your date goes here) method to convert date to seconds from year 0
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html
The function UNIX_TIMESTAMP(datetime) returns the unix time, which happens to be the number of seconds since 1-Jan-1970 0000 UTC. That may be what you need, but not if you're dealing with dates of birth, historical dates, or dates after 2037.
Starting in mysql 5.5.0 you can use to_seconds()
TO_SECONDS(FIELD_NAME)
FIELD_NAME must be DATETIME type
I have created my own query for your problem:
SELECT HOUR(`colname`) * 3600 + MINUTE(`colname`) * 60 + SECOND(`colname`)
FROM widgets
WHERE id = 1;
Use id = 1 if you have to take a specific row.
The output will be in seconds.
Related
I have two unix timestamps 65 seconds apart and i am trying to query mysql in this manner
This is 65 seconds apart 1504684252 + 65
SELECT ask FROM live_rates WHERE the_time BETWEEN
UNIX_TIMESTAMP(1504684252) AND UNIX_TIMESTAMP(1504684317)
SELECT ask FROM live_rates WHERE the_time BETWEEN
FROM_UNIXTIME(1504684252) AND FROM_UNIXTIME(1504684317)
In my table, there is an event starting at timestamp 1504684252 and ending 65 seconds later. Why is there no data returned by either of the queries?.
Your question doesn't really make it clear what data type the_time is - if it's a unix timestamp (i.e. an integer) already, just query it as an integer, given that you seem to know the unix timestamps of your date range:
SELECT ask FROM live_rates WHERE the_time BETWEEN 1504684252 AND 1504684317
If your data in the_time is stored as a datetime, I'd say you should make sure that the server really is converting the values you've supplied to a datetime range that includes the relevant record:
SELECT ask FROM live_rates WHERE id = abcdef
SELECT FROM_UNIXTIME(1504684252), FROM_UNIXTIME(1504684317)
Run these two queries (with the id replaced) and eyeball the data. You'll find the reason, I'm sure - possibly something like a timezone issue, and your unix timestamps are translating to some time in UTC whereas your table data is showing some other time and you've hence mis-translated the time shown into a unix time.. Or possibly that it's an end date that has some time component outside the range of the unix times you specified even though the date part of it is correct.
It's hard to say for sure without a complete, verifiable example (a create table statement with inserted test data and a select demonstrating the problem. Try sqlfiddle.com)
ps; Don't use UNIX_TIMESTAMP() in the way you wrote here; it's not intended to have a unix timestamp passed into it. You either pass it no arguments (in which case it gives you the current datetime of the server clock, as a unix timestamp) or you pass it some datetime (and it will return you the equivalent unix timestamp of that datetime)
If the_time is a unix timestamp as opposed to a date i.e. 1504684252 instead of 2017-09-01 00:00:00, then you don't need FROM_UNIXTIME, which converts a unix timestamp to a date:
SELECT ask FROM live_rates WHERE the_time BETWEEN 1504684252 AND 1504684317
UNIX_TIMESTAMP takes a date/time as parameter and returns an integer. When you're feeding it with an integer it returns 0 - so you're selecting between 0 and 0.
FROM_UNIXTIME takes an integer but it returns a date/time - so if the_time is an integer they're not compatible.
How to find the day difference between today's date and a specified date in SQL. The specified date column(P.SubscrpEndDate__c) is in Date time format(12/1/2014 12:00 Am). I have used the below query but it do not works
DATEDIFF(day,GETDATE(), P.SubscrpEndDate__c) AS 'SubscriptionDueDate'
In MySQL, DATEDIFF function, takes only two arguments: end date and start date:
DATEDIFF(NOW(), P.SubscrpEndDate__c) AS 'SubscriptionDueDate'
According to the manual:
DATEDIFF(expr1, expr2) returns expr1 − expr2 expressed as a value in days from
one date to the other.
Also, to get the current date and time you have to use NOW() instead of GETDATE.
It should work in SQL Server. I assume date column(SubscrpEndDate__c) in your table would contain lower values than current date, so simply you can use query below. I've just swapped second & third parameters to get positive difference in days. You can also use ABS() function to ignore negative difference.
SELECT DATEDIFF(day,P.SubscrpEndDate__c,GETDATE() ) AS 'SubscriptionDueDate'
This would work, kindly check
SELECT DATEDIFF(NOW(),P.SubscrpEndDate__c) AS SubscriptionDueDate FROM xyz_table WHERE id='123456'
Say i've a from date as 17/10/2012 and to date as 18/10/2012.How will i find total no of seconds that is available ?
Update I do not want to select a row which has exceed to date ?
Thanks in advance!
Here is the working demo.
http://sqlfiddle.com/#!2/d41d8/2869
SELECT UNIX_TIMESTAMP('2012-10-19') - UNIX_TIMESTAMP('2012-10-18') as differece_seconds;
"If UNIX_TIMESTAMP() is called with a date argument, it returns the value of the argument as seconds since '1970-01-01 00:00:00' UTC."
You can simply use it with date coulmn.
Please check : http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_unix-timestamp
Assuming your columns are proper DATE/DATETIME columns and not the date strings in your question, subtract the values of UNIX_TIMESTAMP()
SELECT UNIX_TIMESTAMP(date1_column) - UNIX_TIMESTAMP(date2_column) AS difference_seconds
If you have stored dates in the string format you posted above (which is a bad idea), you will need STR_TO_DATE() to first parse them into proper MySQL dates.
SELECT UNIX_TIMSTAMP(STR_TO_DATE('17/10/2012','%d/%m/%%Y')) - UNIX_TIMSTAMP(STR_TO_DATE('18/10/2012','%d/%m/%%Y')) AS difference_seconds
Use UNIX_TIMESTAMP() to get the seconds since epoch for a specific date. Then just subtract both values.
So assuming the values (in some DATE or DATETIME) are stored in col1 and col2 respectively, use can use something like this:
SELECT UNIX_TIMESTAMP( col1 ) - UNIX_TIMESTAMP( col2 ) AS diff FROM yourTable;
select timestampdiff(second,'2012-10-16','2012-10-18');
output will be
172800
I need to pull a variable amount of days of data from a MySQL database that stores the date as a UNIX timestamp in an int column.
For example, if I need the last 5 days of data, what would my query be?
(All queries would start from current date and would go back x amount of days).
Timestamp is considered one of the Date and Time types and therefore any of the Date Time Functions can be used on it.
SELECT * FROM your_table
WHERE Ftimestamp_column > UNIX_TIMESTAMP(DATE_SUB(NOW(), INTERVAL 5 DAY));
I've never tried it but there's a MySQL function to convert unix timestamps into MySQL dates and then you can use DATE_SUB() or whatever. http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_from-unixtime
I want to subtract between two date time values using SQL in MySQL such that I get the interval in minutes or seconds. Any ideas? I want to run a SQL query that retrieves uses from a database who have logged in like 10 minutes from the time.
There are functions TIMEDIFF(expr1,expr2), which returns the value of expr1-expr2, and TIME_TO_SEC(expr3), which expresses expr3 in seconds.
Note that expr1 and expr2 are datetime values, and expr3 is a time value only.
Check this link for more info.
TIMESTAMPDIFF is like TIMEDIFF which Matthew states, except it returns the difference of the two datetimes in whatever units you desire (seconds, minutes, hours, etc).
For example,
SELECT TIMESTAMPDIFF(MINUTE,LogOutTime,LogInTime) AS TimeLoggedIn
FROM LogTable
Would return the number of minutes the user was logged in (assuming you stored this kind of thing in a table like that).
I would do it like this - fetch where last activity is within 10 mins of now
SELECT * FROM table WHERE last_activity >= DATE_SUB(NOW(), INTERVAL 10 MINUTE)
SELECT TIMESTAMPDIFF(MINUTE,LogOutTime,LogInTime) AS TimeLoggedIn
FROM LogTable
This example shall ruin the time if its used by using millitary time. So for calculating millitairy time I do not recommend it Because it outputs negative values.
You can try and cast them to Unix Time stamp, and take the difference.