执行下面语句:
begin
for obj in (select 'alter table '||table_name||' allocate extent' objsql from user_tables where num_rows=0) loop for obj in (select 'alter tabl
执行下面语句:
begin
for obj in (select 'alter table '||table_name||' allocate extent' objsql from user_tables where num_rows=0) loop for obj in (select 'alter tabl