<p> I have two tables (street and parcel) in my Postgis database and I would like to perform the following:<br>
1. Select a particular street segment<br>
2. Select all parcels to the left or right of 1<br>
3. Update a field in parcels selected in 2 with numbers (odd numbers if to the left of 1 or even numbers if to the right of 1.</p>
<p>This is to allow me to allocate house numbers to my parcel table.</p>