bash比较float类型大小

得到数字：

a=`awk 'NR>3 && NR<5 {print $1}' $sqlResult`

b=`awk 'NR>6 && NR<8 {print $1}' $sqlResult`

aInteger=`echo $a|awk -F"." '{print $1}'` 

bInteger=`echo $b|awk -F"." '{print $1}'`

aDigit=`echo $a|awk -F"." '{print $2}'`
bDigit=`echo $b|awk -F"." '{print $2}'`

if [ $ainteger -gt $bInteger ]

then

    echo ‘a is greater than b"

elif [ $ainteger -eq $bInteger ]

then

    if  [ $aDigit -gt $bDigit ]

    then

     echo ‘a is greater than b"

    else

     echo ‘b is greater than b"

    fi

else 

    echo ‘b is greater than b"

fi