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I have a problem regarding the datediff MYSQL function, I can use it and it is simple. But I don't understand how to use it to collect differences within the table field. E.g.
I have a column dob and I want to write a query that will do something like
select dateDiff(current_timeStamp,dob)
from sometable 'here dob is the table column
I mean I want the difference from the current date time to the table field dob, each query result is the difference, the age of the user.
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Using SQL's DateDiff() for Age The short solution is to use the built-in function DATEDIFF( ) where you are able to find the year difference between two dates.
MySQL TIMEDIFF() Function The TIMEDIFF() function returns the difference between two time/datetime expressions. Note: time1 and time2 should be in the same format, and the calculation is time1 - time2.
We can find the age of a person from their date of birth by using this formula: SELECT DATE_FORMAT(FROM_DAYS(DATEDIFF(NOW(),'DATE_OF_BIRTH')), '%Y') + 0 AS age; In the above formula, we are first finding the difference between the current date (NOW()) and the date of birth (in YYYY-MM-DD) using the DATEDIFF() function.
The DATE() function can be used for the comparison of the date of a number of purposes, some of them are: To extract the specific data on the basis of the date by using the inequality or equality signs. To extract the specific data on the basis of the date between different columns.
You mean like this?
SELECT DATE_FORMAT(FROM_DAYS(DATEDIFF(NOW(), dob)), "%Y")+0 AS age from sometable
(Source)
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