Solved

# Time Difference

Posted on 2008-06-19
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Hi
i need to display the duration of the time from two columns.each column consists of date and time.
so in third column i need to display time difference between two columns.

i am using Asp,db2

Thank you
0
Question by:tracy_p
• 2

LVL 18

Expert Comment

ID: 21826537

Since you say that the columns contain both data and time, I'll assume they're using the datatype TIMESTAMP.

In that case, use the TIMESTAMPDIFF function.

Here's the defininition / documentation of that function.

HTH,
DaveSlash

``````The TIMESTAMPDIFF function returns an estimated number of intervals of the type defined by the first argument, based on the difference between two timestamps. numeric-expression The first argument must be a built-in data type of either INTEGER or SMALLINT. Valid values of interval (the first argument) are:

1 - Fractions of a second

2 - Seconds

4 - Minutes

8 - Hours

16 - Days

32 - Weeks

64 - Months

128 - Quarters

256 - Years

string-expression

string-expression is the result of subtracting two timestamps and converting the result to a string of length 22. The argument must be an expression that returns a value of a built-in character string or a graphic string. If string-expression is a character or graphic string, it must not be a CLOB or DBCLOB.

The result of the function is an integer. If either argument can be null, the result can be null; if either argument is null, the result is the null value.

The following assumptions may be used in estimating the difference:

- there are 365 days in a year

- there are 30 days in a month

- there are 24 hours in a day

- there are 60 minutes in an hour

- there are 60 seconds in a minute

These assumptions are used when converting the information in the second argument, which is a timestamp duration, to the interval type specified in the first argument. The returned estimate may vary by a number of days. For example, if the number of days (interval 16) is requested for a difference in timestamps for '1997-03-01-00.00.00' and '1997-02-01-00.00.00', the result is 30. This is because the difference between the timestamps is 1 month so the assumption of 30 days in a month applies.

Example - Estimate the age of employees in months.

SELECT

TIMESTAMPDIFF(64,

CAST(CURRENT_TIMESTAMP-CAST(BIRTHDATE AS TIMESTAMP) AS CHAR(22)))

AS AGE_IN_MONTHS

FROM EMPLOYEE
``````
0

LVL 18

Accepted Solution

daveslash earned 500 total points
ID: 21826624

I suppose I should include the syntax of the function:

TIMESTAMPDIFF ( numeric-expression , string-expression )

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