Question

Below is my table contains duration as HH:MM:SS

i could convert it into seconds by

SELECT  (SUBSTRING(CAST('00:01:15' AS NVARCHAR(MAX)),1,2) * 360) 
+ (SUBSTRING(CAST('00:01:15' AS NVARCHAR(MAX)),4,2) * 60) 
+  SUBSTRING(CAST('00:01:15' AS NVARCHAR(MAX)),7,2)

and now i need to update that table into seconds by reading each row of records how?

like instead of having ’00:01:15′ i need each row of @DURATIONINSECONDS

Answer 1

Try like below

If your table have value like this

Table1

DurationInSeconds
00:01:15    
00:00:15    
00:01:16    
00:01:17

and you want to Update the field DurationInSeconds into Seconds…

then just try like the below query….

update Table1 set DurationInSeconds = (SUBSTRING(CAST(DurationInSeconds AS NVARCHAR(MAX)),1,2) * 360) + (SUBSTRING(CAST(DurationInSeconds AS NVARCHAR(MAX)),4,2) * 60) +  SUBSTRING(CAST(DurationInSeconds AS NVARCHAR(MAX)),7,2)

then it give the Result like below

SELECT * from Table1

DurationInSeconds
75
15
76
77