sql 如何取日期的年份

Posted 2023-03-21

有如下几个表：
STUDENTS(SID, NAME, FIRSTNAME, BIRTH_DATE, WEIGHT, YEAR)
COURSE(CID, NAME, HOURS, YEAR)
FACULTY(FID, NAME, SPECIALTY, DATE_HIRE, LAST_RAISE, BASE_SALARY, CURRENT_SALARY)
RESULTS(SID, CID, POINTS )

写sql语句：
Obtain the year of FACULTY Pucette’s last raise.（LAST_RAISE的类型是DATE)

Display the average age of students. This average should be displayed as an integer.

Display the NAME of FACULTY for whom 50 months at least separate the hire date and the last raise date.

运行环境是oracle，第一题用SELECT YEAR（LAST_RAISE）FROM FACULTY运行错误。
The type of LAST_RAISE is DD/MM/YY

参考技术A sqlserver中的是

year（字段） --字段须是datetime型的

或者提取当天的时间是 getdate()
之后再提取年份 参考技术B SELECT TO_CHAR(TO_DATE(LAST_RAISE, 'DD/MM/YY'), 'YYYY') FROM FACULTY;本回答被提问者采纳