Duplicates
Digression: Metadata of query results
Example 2
jao=# select x from dups_ok;
x
-----
100
100
(2 rows)
- Query result names the column to match the table.
jao=# select x + 0 from dups_ok;
?column?
------------
100
100
(2 rows)
- Query result does not preserve the column name.
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