【单选题】You work as a network engineer, do you know an IPsec tunnel is negotiated within the protection of whichtype of tunnel?()
【判断题】OCC为二级调度机构,服从DCC统一指挥。
【多选题】According to the plane shape of tunnel, it can be classified as
【多选题】计算机可分为通用计算机和专用计算机,这是按()进行分类。
【单选题】在已建"职工"表中有姓名、性别、出生日期等字段,查询并显示所有年龄在50岁以上职工的姓名、性别和年龄,正确的SQL命令是
A.
SELECT 姓名, 性别, YEAR(DATE())-YEAR ([出生日期]) AS 年龄 FROM 职工 WHERE YEAR (Date())-YEAR ([出生日期])>50
B.
SELECT 姓名, 性别, YEAR (DATE ())-YEAR ([出生日期]) 年龄 FROM 职工 WHERE YEAR (Date())-YEAR ([出生日期])>50
C.
SELECT 姓名, 性别, YEAR (DATE ())-YEAR ([出生日期]) AS 年龄 FROM 职工 WHERE 年龄>50
D.
SELECT 姓名, 性别, YEAR(DATE ())-YEAR([出生日期]) 年龄 FROM 职工 WHERE 年龄>50
【单选题】在已建"职工"表中有姓名、性别、出生日期等字段,查询并显示女职工年龄最小的职工姓名、性别和年龄,正确的SQL命令是
A.
SELECT 姓名,性别,MIN(YEAR(DATE())-YEAR([出生日期])) AS 年龄 FROM 职工 WHERE 性别=女
B.
SELECT 姓名,性别,MIN(YEAR(DATE())-YEAR([出生日期])) AS 年龄 FROM 职工 WHERE 性别="女"
C.
SELECT 姓名,性别,年龄 FROM 职工 WHERE 年龄=MIN(YEAR(DATE())-YEAR([出生日期])) AND 性别=女
D.
SELECT 姓名,性别,年龄 FROM 职工 WHERE 年龄=MIN(YEAR(DATE())-YEAR([出生日期])) AND 性别="女"
【单选题】在已建"职工"表中有姓名、性别、出生日期等字段,查询并显示所有年龄在50岁以上职工的姓名、性别和年龄,正确的SQL命令是
A.
SELECT 姓名, 性别, YEAR(DATE())-YEAR ([出生日期]) AS 年龄 FROM 职工
B.
SELECT 姓名, 性别, YEAR (DATE ())-YEAR ([出生日期]) 年龄 FROM 职工
C.
SELECT 姓名, 性别, YEAR (DATE ())-YEAR ([出生日期]) AS 年龄 FROM 职工
D.
SELECT 姓名, 性别, YEAR(DATE ())-YEAR([出生日期]) 年龄 FROM 职工