documentation: attribute-based restrictions reduce number of records, not fields returned

[lorin]

Here ​http://www.postgis.org/documentation/manual-1.3/ch04.html#id2571948

It says: The most straightforward means of pulling data out of the database is to use a SQL select query and dump the resulting columns into a parsable text file: However, there will be times when some kind of restriction is necessary to cut down the number of fields returned.

I believe that last sentence should instead say "…reduce the number of RECORDS returned" (This sentence appears in earlier version documentation too).

[darkblueb]

SQL theory says that you can restrict a SELECT operation by either row, column or both

[robe]

fixed. Also made some other corrections of obsolete syntax. 2.0: r8280 , 1.5: r8277, 1.4: r8278, 1.3: r8279