S
- SAVEPOINT
- scale()
- SECURITY LABEL
- seg
- segment_size
- sepgsql
- Sequence relation
- server_encoding
- Server Programming Interface (SPI)
- Server utility
- server_version
- server_version_num
- session_preload_libraries
- SET
- set_config()
- set_join_pathlist_hook
- set_rel_pathlist_hook
- SET TRANSACTION
- sha224()
- sha256()
- sha384()
- sha512()
- shared_preload_libraries
- shmem_startup_hook
- shobj_description()
- SHOW
- Slash command
- smgr
- snapshot_too_old
- sort_mem
- spi
- split_part()
- sqlite_fdw
- SQL/MED
- sslinfo
- ssl_passphrase_command
- ssl_passphrase_command_supports_reload
- standby_mode
- standby.signal
- starts_with()
- START TRANSACTION
- statement_timeout
- statement_timestamp()
- Statistics collector
- stmt_beg
- stmt_end
- Storage parameters
- string_to_array()
- string_to_table()
- strpos()
- substr()
- superuser_reserved_connections
- suppress_redundant_updates_trigger
- synchronous_commit
- System catalogue