例如数据库用户名为username   要删除所有表名以TBL_开头的表的数据：

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declare
cursor c1 is select table_name
               from dba_tables
              where owner='USERNAME';
begin
for c2 in c1 loop
if instr(c2.table_name,'TBL_')=1 then

execute immediate 'delete from USERNAME.'||c2.table_name;

end if;
end loop;
end;

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注意大小写：where owner='USERNAME';

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