
Câu hỏi về SQL
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Information Technology (IT)
University
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mệnh đề nào trong SQL được sử dụng để xác định bảng chứa dữ liệu cần truy vấn?
SELECT
IN
EXTRACT
FROM
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chức năng chính của Mệnh đề SELECT trong SQL là gì?
Truy vấn và lấy dữ liệu từ bảng
Sửa đổi dữ liệu hiện có trong bảng
Xóa dữ liệu khỏi bảng
Thêm dữ liệu mới vào bảng
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong câu lệnh SELECT, phần nào được sử dụng để chỉ định các cột cần lấy dữ liệu?
WHERE
ORDER BY
FROM
<danh_sách_chọn>
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu lệnh SQL nào sau đây chọn MaSP, TenSP và DonGia từ bảng SanPham?
SELECT ALL FROM SanPham WHERE MaSP, TenSP, DonGia
SELECT MaSP, TenSP, DonGia FROM SanPham
SELECT (MaSP, TenSP, DonGia) FROM SanPham
SELECT MaSP + TenSP + DonGia FROM SanPham
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu lệnh SQL nào sau đây sử dụng bí danh cho bảng Khach Hang?
SELECT * FROM KhachHang WITH KH
SELECT * FROM Khach Hang KH AS
SELECT * FROM Khach Hang AS KH
Không có đáp án đúng
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu lệnh SQL nào sau đây là sai cú pháp khi sử dụng bí danh cho cột?
SELECT TenKH AS TenKhachhang FROM KhachHang;
SELECT TenKH Tên khách hàng FROM KhachHang;
SELECT TenKH AS TenKhach Hang FROM KhachHang;
SELECT TenKH AS tenkhachhang FROM KhachHang;
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu lệnh SQL nào sau đây lấy ra cột TenKH và DiaChi từ bảng Khach Hang?
SELECT TenKH, DiaChi FROM KhachHang
SELECT FROM Khach Hang WHERE TenKH, DiaChi
SELECT * FROM Khach Hang WHERE TenKH AND DiaChi
SELECT TenKH AND DiaChi FROM KhachHang
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