다음은 emp 테이블의 Size 를 확인하는 쿼리와 emp 테이블의 데이터 정보입니다.
-bash-4.1$ psql
psql.bin (9.3.5)
Type "help" for help.
postgres=# SELECT pg_size_pretty( pg_total_relation_size('emp')) as emp;
emp
-------
24 kB
(1 row)
postgres=# select * from emp;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+------------+---------+---------+--------
7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | | 20
7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30
7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | | 20
7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30
7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 1987-04-19 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 1981-11-17 | 5000.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30
7876 | ADAMS | CLERK | 7788 | 1987-05-23 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | | 30
7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | | 20
7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | | 10
(14 rows)
postgres=#
