Select record between two IP ranges

Question

I have a table which stores a ID, Name, Code, IPLow, IPHigh such as:

1, Lucas, 804645, 192.130.1.1, 192.130.1.254
2, Maria, 222255, 192.168.2.1, 192.168.2.254
3, Julia, 123456, 192.150.3.1, 192.150.3.254

Now, if I have an IP address 192.168.2.50, how can I retrieve the matching record?

Edit

Based on Gordon's answer (which I'm getting compilation errors) this is what I have:

select PersonnelPC.*
from (select PersonnelPC.*,
             (
              cast(parsename(iplow, 4)*1000000000 as decimal(12, 0)) +
              cast(parsename(iplow, 3)*1000000 as decimal(12, 0)) +
              cast(parsename(iplow, 2)*1000 as decimal(12, 0)) +
              (parsename(iplow, 1))
             ) as iplow_decimal,
            (
              cast(parsename(iphigh, 4)*1000000000 as decimal(12, 0)) +
              cast(parsename(iphigh, 3)*1000000 as decimal(12, 0)) +
              cast(parsename(iphigh, 2)*1000 as decimal(12, 0)) +
              (parsename(iphigh, 1))
             ) as iphigh_decimal
      from PersonnelPC
     ) PersonnelPC
where 192168002050 between iplow_decimal and iphigh_decimal;

but this gives me an error:

Msg 8115, Level 16, State 2, Line 1
Arithmetic overflow error converting expression to data type int.

Any ideas?

Answer 1

Painfully. SQL Server has lousy string manipulation functions. It does, however, offer parsename(). This approach converts the IP address to a large decimal value for the comparison:

select t.*
from (select t.*,
             (cast(parsename(iplow, 4)*1000000000.0 as decimal(12, 0)) +
              cast(parsename(iplow, 3)*1000000.0 as decimal(12, 0)) +
              cast(parsename(iplow, 2)*1000.0 as decimal(12, 0)) +
              cast(parsename(iplow, 1) as decimal(12, 0))
             ) as iplow_decimal,
             (cast(parsename(iphigh, 4)*1000000000.0 as decimal(12, 0)) +
              cast(parsename(iphigh, 3)*1000000.0 as decimal(12, 0)) +
              cast(parsename(iphigh, 2)*1000.0 as decimal(12, 0)) +
              cast(parsename(iphigh, 1) as decimal(12, 0))
             ) as iphigh_decimal
      from t
     ) t
where 192168002050 between iplow_decimal and iphigh_decimal;

I should note that IP addresses are often stored in the database as the 4-byte unsigned integers. This makes comparisons much easier . . . although you need complicated logic (usually wrapped in a function) to convert the values to a readable format.