Question

我是PL / SQL的新手我试图将删除的记录保存到临时表中。为此我做了一个触发器如下：

create or replace trigger aa
before delete on master_table
declare
v_id number(2);
begin
select id into v_id from master_table;
insert into temp_table values(v_id);
end;
/

但是当我尝试从master_table中删除记录时，会抛出这些异常：

ORA-01422: exact fetch returns more than requested number of rows
ORA-06512: at "SYSTEM.AA", line 4
ORA-04088: error during execution of trigger 'SYSTEM.AA'

提前谢谢。

Answer 1

您可以为每一行创建执行触发器，只需使用:old.id将值插入临时表。

create or replace trigger aa
before delete on master_table
for each row
begin
    insert into temp_table values(:old.id);
end;
/

ORA-01422：精确提取返回超过请求的行数ORA-06512：在“SYSTEM.AA”

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