num_rows 不显示值
create table t1(id int,name varchar(20)); insert into t1 values(1,'tom'); SQL> select num_rows,table_name from user_tables; NUM_ROWS TABLE_NAME ---------- ------------------------------ T1 //收集一下统计信息,就可以看到了 SQL> CALL DBMS_STATS.GATHER_TABLE_STATS ('AAA','T1'); SQL> select num_rows,table_name from user_tables; NUM_ROWS TABLE_NAME ---------- ------------------------------ 1 T1