read min max rows <<< $(mysql $dbDatabase -u $dbUser -p$dbPass -B -N -e
    "SELECT MIN(`DateTime`), MAX(`DateTime`), COUNT(*) FROM $dbTable")
echo "Min Date:" $min
echo "Max Date:" $max
echo "Total Rows:" $rows

Min Date: 2013-03-18
Max Date: 20:30:00
Total Rows: 2014-07-31 14:30:00 11225139

IFS=$'t' read min max rows <<< ...

Min Date: 2013-03-18 20:30:00 2014-07-31 14:30:00 11225139
Max Date:
Total Rows:

read min max rows <<< $(mysql $dbDatabase -u $dbUser -p$dbPass -B -N -e
    "SELECT MIN(`DateTime`), MAX(`DateTime`), COUNT(*) FROM $dbTable"
    | tr ' ' '.')
min=$(tr '.' ' ' <<< $min)
max=$(tr '.' ' ' <<< $max)

echo "Min Date:" $min
echo "Max Date:" $max
echo "Total Rows:" $rows