Oracle's simplest method of querying table space usage and remaining amount

It is much easier to write a long script than to use other views. It is said that it can be used from Oracle 7.x to 11g.

Sm $ ts_used & sm $ ts_free

Idle> select * from sm $ ts_used;

TABLESPACE_NAME BYTES
----------------------------------------
SYSAUX 256573440
UNDOTBS1 8323072
Users' 3211264
SYSTEM 506789888
Examples 71499776

Idle> select * from sm $ ts_free;

TABLESPACE_NAME BYTES
----------------------------------------
UNDOTBS1 23068672
SYSAUX 15990784
Users' 1966080
SYSTEM 6946816
Examples 33292288