Question

我正在尝试获取当月出生的所有员工的列表。我已存储日期，如'16 -Sep-2017'，每当我运行我的代码时，它会给我错误ORA-00904：“MONTH”：不合法的识别符。这是我的代码：

SELECT * from employee1 where month(birth_date)=month(now);

SELECT * FROM employee1 WHERE month(bithdate) = MONTH(CURRENTTIME());

SELECT  * FROM employee1
WHERE MONTH(STR_TO_DATE(birth_date, '%d-%m-%Y')) = MONTH(NOW());

SELECT * FROM EMPLOYEE1 WHERE STR_TO_DATE(BIRTH_DATE,'%d-%m-%y')=MONTH(CURRENT_DATE);

select * from employee1 
where CAST(SUBSTRING(birth_date,'%d-%m-%y')AS unsigned)=MONTH(CURRENT_DATE);

select * from employee1 
where CAST(SUBSTRING(birth_date,'%d-%m-%y')AS varchar2)=MONTH(CURRENT_DATE);

select * from employee1 where to_date('birthdate', 'dd-mon-yyyy')=month(current_date);

我已经尝试了所有可能性，但每次我遇到错误的无效月份标识符

Answer 1

oracle表单是extract（表达式中的元素），例如select dual（来自current_date的月份）monthnumber来自dual;

ORA-00904：“MONTH”：标识符无效

1 个答案: