[postgis] distance...

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[postgis] distance...

Hello all

I think this is a postgis question:

i have defined roads in the database and they are something like this:
1               2|

The points 1 (x,y) and 2 (x,y) defined "road 1" and points 3 (x,y) and
4 (x,y). But what i need to know is the distance between points 1 and
3. Can i do this using postgis functions?


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