How to Convert an Integer Representing Time to HH:MM:SS:00 Format in SQL Server 2008?

Convert Integer Time to HH:MM:SS:00 in SQL Server 2008

Question:

In SQL Server 2008, it is necessary to transform an integer time value into the time format HH:MM:SS:00. Additionally, it is essential to understand whether the '00' in this format represents milliseconds.

Answer:

To convert an integer time to HH:MM:SS:00, utilize the following steps:

1. Extract Hour: Divide the integer time by 1,000,000 and take the modulus 100 to obtain the hour value.
2. Extract Minute: Divide the remaining integer time by 10,000 and take the modulus 100 to obtain the minute value.
3. Extract Second: Divide the remaining integer time by 100 and take the modulus 100 to obtain the second value.
4. Extract Millisecond: Multiply the remaining integer time by 10 to obtain the millisecond value.

The '00' in the time format HH:MM:SS:00 represents milliseconds.

Example:

Consider the integer time 10455836.

SELECT
    (@T / 1000000) % 100 AS hour,
    (@T / 10000) % 100 AS minute,
    (@T / 100) % 100 AS second,
    (@T % 100) * 10 AS millisecond

Result:

hour    minute  second  millisecond
10      45      58      360

Alternatively, you can use the following query for a more comprehensive result:

SELECT
    DATENAME(HOUR, DATETIMEFROMPARTS(@T / 1000000 % 100, @T / 10000 % 100, @T / 100 % 100, @T % 100 * 10)) AS hour,
    DATENAME(MINUTE, DATETIMEFROMPARTS(@T / 1000000 % 100, @T / 10000 % 100, @T / 100 % 100, @T % 100 * 10)) AS minute,
    DATENAME(SECOND, DATETIMEFROMPARTS(@T / 1000000 % 100, @T / 10000 % 100, @T / 100 % 100, @T % 100 * 10)) AS second,
    DATENAME(MILLISECOND, DATETIMEFROMPARTS(@T / 1000000 % 100, @T / 10000 % 100, @T / 100 % 100, @T % 100 * 10)) AS millisecond

Output:

hour       minute   second   millisecond
10         45       58       360

This method also clearly identifies the time components as hour, minute, second, and millisecond.

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