1、查看當(dāng)前數(shù)據(jù)庫實例版本。

postgres=# select version();
version
———————————————————————————————————–
PostgreSQL 9.3.0 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-23), 64-bit
(1 row)