create or replace
procedure reset_seq( p_seq_name in varchar2 )
is
    l_val number;
begin
    execute immediate
    'select ' || p_seq_name || '.nextval from dual' INTO l_val;

    execute immediate
    'alter sequence ' || p_seq_name || ' increment by -' || l_val ||
                                                          ' minvalue 0';

    execute immediate
    'select ' || p_seq_name || '.nextval from dual' INTO l_val;

    execute immediate
    'alter sequence ' || p_seq_name || ' increment by 1 minvalue 0';
end;

SELECT  a.sequence_name 序列名稱,
a.min_value 序列最小值,
to_char(to_number( a.max_value)) 序列最大值,
a.last_number 序列當(dāng)前值,
CASE  a.last_number WHEN 1 THEN '--不需要重置;' ELSE
'CALL seq_reset(''' || a.sequence_name || ''');' END 重置序列腳本,
'DROP SEQUENCE ' || a.sequence_name 刪除序列腳本,
'RENAME ' || a.sequence_name || ' TO {newname}'  重命名腳本
FROM USER_SEQUENCES a WHERE a.last_number<>1
ORDER BY a.sequence_name ASC;