gbase=# SELECT * FROM pg_tables;
gbase=# \d+ customer_t1;
gbase=# SELECT count(*) FROM customer_t1;
gbase=# SELECT * FROM customer_t1;
gbase=# SELECT c_customer_sk FROM customer_t1;
gbase=# SELECT DISTINCT( c_customer_sk ) FROM customer_t1;
gbase=# SELECT * FROM customer_t1 WHERE c_customer_sk = 3869;
gbase=# SELECT * FROM customer_t1 ORDER BY c_customer_sk;