In MariaDB, ADDDATE() is a built-in date and time function that performs date arithmetic.
It allows you to change a date by specifying the date, the unit to add, and the amount to add. You can pass a negative amount if you need to subtract the date by a certain interval.
ADDDATE() also has a shortcut syntax that allows you to add a given number of days to the date.
In MariaDB, DATE_ADD() is a built-in date and time function that performs date arithmetic.
It allows you to change a date by specifying the date, the unit to add, and the amount to add. You can pass a negative amount if you need to subtract the date by a certain interval.
This article contains a list of date operators, methods, and variables that you can use when working with dates in MongoDB.
I thought it would be interesting to run a few quick queries to see how various formatting strings affect the formatting of date/time values.
Below is a full list of date/time functions available in PostgreSQL.
Postgres has the age() function that returns the age in years, months, and days based on two dates.
This works fine unless you only want to return the age in years.
For example, you simply want to return a person’s age based on their birthday. You want something like 32 instead of 32 years 4 mons 67 days, which is what age() is likely to return.
Fortunately there’s an easy way to do this in PostgreSQL.
In PostgreSQL you can use the extract() function to get the week number from a date.
You can also use the date_part() function to do the same thing.
In PostgreSQL you can use the extract() function to get the day from a date.
You can also use date_part() to do the same thing.
When extracting the day from a date, you need to specify what sense of the word “day” you mean. For example, “day of week”, “day of month”, “day of year”, etc.
In PostgreSQL, you can use the AT TIME ZONE clause to convert a timestamp to another timezone.
In PostgreSQL, the make_interval() function creates an interval from years, months, weeks, days, hours, minutes and seconds fields.
You provide the years, months, weeks, days, hours, minutes and/or seconds fields, and it will return an interval in the interval data type.