Converting a 5 digit int into time - sql

Question

In a legacy system (SQL Server 2005) I have a column that stores a 5 digit integer (ie 86340) as time. The legacy application shows 86340 as 23:59:00. I am unsure how how to translate that 5 digit integer into a date-time data type using SQL.

Answer 1

SQL Server 2012+ has TIMEFROMPARTS function:
TIMEFROMPARTS ( hour, minute, seconds, fractions, precision )
Returns a time value for the specified time and with the specified precision.
Which is similiar to Excel's TIME:
TIME(hour, minute, second)
Excel version could handle values over 0-60 range:
Minute Required. A number from 0 to 32767 representing the minute. Any value greater than 59 will be converted to hours and minutes.
And SQL counterpart cannot do that.
It looks like that value is simply number of seconds so you could use:
DECLARE #A1 INT = 86340;
SELECT DATEADD(second, #A1,CAST('00:00:00' AS TIME));
DBFiddle Demo
EDIT:
As SQL Server 2005 does not support TIME data type, you could use DATETIME instead and skip date part in application.
DECLARE #A1 INT = 86340;
SELECT DATEADD(second, #A1,CAST('00:00:00' AS DATETIME));
DBFiddle Demo2

Answer 2

Since the value you have is an integer representation of the seconds since midnight, you have a couple of choices in SQL Server 2005. You can either render the value as a VARCHAR, which is readable, you can render it as DATETIME, which appends the date information, or you can maybe pull in a date from another field to get an meaningful DATETIME for your value.
SELECT CONVERT(VARCHAR(12), DATEADD(SECOND, 86340, 0), 114) AS [InVarchar];
+--------------+
| InVarchar |
+--------------+
| 23:59:00:000 |
+--------------+
SELECT DATEADD(SECOND, 86340, 0) AS [InDatetime];
+-------------------------+
| InDatetime |
+-------------------------+
| 1900-01-01 23:59:00.000 |
+-------------------------+
SELECT DATEADD(SECOND, 86340, CAST('2018-09-05' AS DATETIME)) AS [InDatetimeWithDate];
+-------------------------+
| InDatetimeWithDate |
+-------------------------+
| 2018-09-05 23:59:00.000 |
+-------------------------+

Answer 3

USE below query:
SELECT CONVERT(DATETIME, #Column_Name)
FROM Table;