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db1=# select * from pg_database where datname = 'postgres';

 datname  | datdba | encoding | datistemplate | datallowconn | datco
nnlimit | datlastsysoid | datvacuumxid | datfrozenxid | dattablespac
e | datconfig | datacl
----------+--------+----------+---------------+--------------+------
--------+---------------+--------------+--------------+-------------
--+-----------+--------
 postgres |     10 |        6 | f             | t            |      
      -1 |         10792 |          499 |          499 |          16
      63 |           |
(1 row)

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db1=# \x
Expanded display is on.

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db1=# select * from pg_database where datname = 'postgres';

-[ RECORD 1 ]-+---------
datname       | postgres
datdba        | 10
encoding      | 6
datistemplate | f
datallowconn  | t
datconnlimit  | -1
datlastsysoid | 10792
datvacuumxid  | 499
datfrozenxid  | 499
dattablespace | 1663
datconfig     |
datacl        |

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$ psql -x db1

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