oracle默認將字段轉成了大寫存着,查詢的字段不加雙引號默認轉爲大寫去查詢
使用雙引號將區分大小寫
select sysdate from dual;等同於select "SYSDATE" from dual;
select "sysdate" from dual;等同於select "sysdate" from dual;
oracle默認將字段轉成了大寫存着,查詢的字段不加雙引號默認轉爲大寫去查詢
使用雙引號將區分大小寫
select sysdate from dual;等同於select "SYSDATE" from dual;
select "sysdate" from dual;等同於select "sysdate" from dual;