Firebird:在iSQL中查询执行时间

我想获得查询执行时间iSQL.

例如 :

SELECT * FROM students;

我如何获得查询执行时间？

用途SET STATS:

SQL> SET STATS;
SQL> SELECT * FROM RDB$DATABASE;
... query output removed ....

Current memory = 34490656
Delta memory = 105360
Max memory = 34612544
Elapsed time= 0.59 sec
Buffers = 2048
Reads = 17
Writes 0
Fetches = 270
SQL>