Oracle 我正在递增该值并将其更新到表中

将错误获取为：

create or replace trigger trans_s_t5
after insert
on trans_s
for each row
begin
update :old.no_of_books
set book_no=:old.no_of_books+1
where book_no=:trans_s.book_no;
end;

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似乎您正试图更改此触发器中TRANS_S表中的字段值，该值在TRANS_S表中定义。如果是这样，您可以通过将触发器更改为BEFORE触发器并直接更新字段来完成此操作，如中所示：

PLS-00049: bad bind variable 'OLD.NO_OF_BOOKS' Compilation failed, line 3
PLS-00049: bad bind variable 'OLD.NO_OF_BOOKS' Compilation failed, line 4
PLS-00049: bad bind variable 'TRANS_S.BOOK_NO' Compilation failed, line 2 
PL/SQL: ORA-00903: invalid table name Compilation failed, line 2 (10:11:17)
PL/SQL: SQL Statement ignored 

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祝你好运。

你想更新什么？一张桌子？不能对表使用：old和：new。只有特定的列和什么是：trans_s？发布您的表结构

create or replace trigger trans_s_t5
  BEFORE insert on trans_s
  for each row
begin
  :NEW.NO_OF_BOOKS := :NEW.NO_OF_BOOKS + 1;
end;