Shell Programming and Scripting

Please become accustomed and tightly adhere to telling people in here your OS and shell versions with every new thread! Solutions given above rely on being run with a recent bourne shell, like bash or ksh.
Using shell arrays is an apt approach for tasks like given, eliminating "horizontal" and "vertical" problems. Both rdrtx1 and Chubler_XL use it, (set -A being ksh- specific). Make sure your shell provides arrays. If you run your scripts in e.g. sh, none of the proposals will work.

Try (recent bash required)

Code:

PRIM_SEQ=($(some sql code))
STDBY_SEQ=($(some sql code))
for i in ${!PRIM_SEQ[*]}; do echo $(( PRIM_SEQ[i] - STDBY_SEQ[i] )); done
150
80

Hi amar1208...

Just a note reference rdrtx1's post #2:
The first line should read something like #!/bin/bash as 'sh' assumes POSIX compatibility so ARRAYS are technically not possible.
Make sure you are using bash, ksh or another advanced shell to get that facility.

--- Post updated at 02:26 PM ---

I hope this does not attach itself to my previous:
RudiC's code works absolutely fine on bash version:

Code:

GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin18)
Copyright (C) 2007 Free Software Foundation, Inc.

Modified with real commands and fixed values:

Code:

#!/bin/bash
PRIM_SEQ=($( python -c "print('200 100')" ))
STDBY_SEQ=($( echo "50 20" ))
for i in ${!PRIM_SEQ[*]}; do echo $(( PRIM_SEQ[i] - STDBY_SEQ[i] )); done

Note to RudiC:
'STB_SEQ' should read 'STDBY_SEQ'...