
CSDL BAI 6
Authored by Maii Đặng
Other
University
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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đâu là quy tắc đặt tên định danh KHÔNG đúng trong SQL server
Ko trùng với từ khóa của T-SQL
Bắt đầu là 1 kí tự thông thường A_Z
Tối đa 128 kí tự
Có thể chứa dấu cách
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Kết quả của câu lệnh SELECT COUNT (*) FROM SanPham là gì nếu bảng “SanPham” có 10 sản phẩm
Ko xác định
10
0
1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu lệnh nào tính toán số ngày giữa ngày “2024-07-30” và “2024-07-27”
SELECT DATASUB(day ‘2024-07-30’ và ‘2024-07-27’)
SELECT DATEADD(day, -3, ‘2024-07-30’)
SELECT DATEDIFF(day, ‘2024-07-27’, ‘2024-07-30’)
SELECT DATEPART(day, ‘2024-07-30’, DATEPART(day, ‘2024-07-27’)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu lệnh nào trích xuất 3 kí tự đầu tiên của chuỗi “Vietnam”
SELECT SUBSTRING(‘Vietnam’, 1, 3)
SELECT LEFT(‘Vietnam’, 3)
SELECT CHARINDEX(‘nam’, ‘Vietnam’)
SELECT LEN(‘Vietnam’)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kết quả của câu lệnh SELECT ROUND(5.7, 0) là gì
6
0
5
5.7
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đâu là câu lệnh đúng?
Create database QLSV
Create databa QLSV
Create database quản lí sinh viên
Create data QLSV
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong các lệnh SQL sau đây, lệnh nào dùng để thêm cột "Email" có kiểu dữ liệu VARCHAR(50) vào bảng "NhanVien"?
ADD COLUMN Email VARCHAR(50) TO NhanVien
ALTER TABLE NhanVien ADD COLUMN Email VARCHAR(50);
ALTER TABLE NhanVien ADD Email VARCHAR(50)
ALTER COLUMN NhanVien ADD Email VARCHAR(50);
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