今天用pl/sql developer查询时出错了。sql语句如下:
select t.* from t_user_test t where t.t_dept = 48000148400 and t.t_user=790000561;
报‘无效数字’错误,把 and t.t_user=790000561 去掉就能查询出来,把790000561改成‘790000561’也能查询出来。
那个t_dept和t_user都是varchar2(100)类型的,怎么t_dept就没错?搞不懂为什么。
------解决方案--------------------
- SQL code
SQL> create table test1(id varchar2(200)); Table createdSQL> insert into test1 values('1'); 1 row insertedSQL> commit; Commit completeSQL> select * from test1 where id = 1; ID--------------------------------------------1SQL> insert into test1 values('-'); 1 row insertedSQL> commit; Commit completeSQL> select * from test1 where id = 1; select * from test1 where id = 1 ORA-01722: 无效数字