3.2、提取下一行数据

postgres=# DECLARE tbase_cur SCROLL CURSOR FOR SELECT * from tbase ORDER BY id; 
DECLARE CURSOR
postgres=# FETCH NEXT from tbase_cur ;               
 id |  nickname   
----+-------------
  1 | hello TBase
(1 row)
postgres=# FETCH NEXT from tbase_cur ;
 id | nickname  
----+-----------
  2 | TBase好
(1 row)