Shell Programming and Scripting

read readTerminal
terminal_c=$readTerminal
if [$terminal_c == 'B' || $terminal_c == 'K' || $terminal_c == 'T'];
 then
{
#Execute the first SQL query
}
else
echo next script
fi

if this_list_exit_value_is_0
then
       do_this
else
       # exit wasn't 0, so do
       something_not_ok
fi

# argument delimiter between every elements in the command line
if [ $terminal_c = 'B' -o $terminal_c = 'K' -o $terminal_c = 'T' ]
then     
           # have to include 1 to N lines. : is the nop command
           echo "BKT"
else
            echo next script
fi

if [[ $terminal_c == 'B' || $terminal_c == 'K' || $terminal_c == 'T' ]]
then
           # have to include 1 to N lines. : is the nop command
           echo "BKT"

else
            echo next script
fi

read readTerminal
terminal_c=$readTerminal
if [ $terminalc = 'B' -o $terminalc = 'K' -o $terminalc = 'T' ]
 then
{
#Execute the first SQL query
}
elif [ $terminalc = 'P' -o $terminalc = 'Q' ] then
#Execute the second SQL query
else
echo next script
fi