Calculation the difference between 2 dates in SQL Server and DB2 -



Calculation the difference between 2 dates in SQL Server and DB2 -

i know there lot ways calculate difference between dates in different databases. problem need way that work in both sql server , db2 using same sql query.

on yearly basis can use

current_timestamp - [birthdate] agethisyear

but want know persons age in decimal form i.e. 34,4 depending on persons birthday , current date.

in sql server columntype [birthdate] datetime , in db2 column type date.

the format yyyy-mm-dd

is there way this?

regards, alfred

i think way can write function work in both databases utilize year(), month(), , day(), or write functions yourself. there not much overlap in date functions between 2 databases.

for instance, total years between 2 dates, use:

select (year(current_timestamp) - year(birthdate) + (case when month(current_timestamp) * 100 + day(current_timestamp) < month(birthdate) * 100 + day(birthdate) -1 else 0 end) ) ageinyears

fractional years much more complicated. of course, each database has own more reasonable methods getting want. methods different.

sql sql-server db2 date-difference

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