How to convert MM:SS into Seconds with varying values of Minutes length.

Question

I have one table in Oracle where there is one Column "Duration" and it is having entries like
59:00,
30:00,
59:05
30
120:45
etc.
These entries are in Minutes and Seconds with MM:SS Format.Where MM:SS stands for Minute and SS is seconds only.
Minutes can be of Length 1 (i.e. 01:00) of Length 2 (18:00) of Length 3 (i.e. 200:00) of Length 4 (i.e. 1440:00).
I need to convert these Minutes (MM:SS) only into Seconds and want seconds as it is using SQL Query.
Note:-Here Duration will be in MM:SS format like 65:06,100:00,1200:30
Minutes or it can be in seconds also 50,30 etc.
DURATION column is VARCHAR2 and database is Oracle.
Please suggest SQL Query and help me to convert it as it is needed badly.
Thanks in Advance for Help and Inputs.Looking forward for all kind of Help.

Answer 1

What yaar..
I fforgot to multiply with 60
sql>
select duration,nvl(to_number(substr(duration,1,instr(duration,':')-1)),0)*60 mts_to_sec,
    nvl(to_number(substr(duration,1,instr(duration,':')-1)),0)*60+
     to_number(substr(duration,decode(instr(duration,':'),0,1,instr(duration,':')+1))) tot_sec
from t;
DURATION MTS_TO_SEC TOT_SEC 
1:30     60     90 
10:30    600    630 
100:00   6000   6000 
5512     0      5512
08:30    480    510 
1440:00  86400  86400
Message was edited by:
        jeneesh