Update the 'quantity' column in a table named 'stock' to double the existing values.

UPDATE stock SET quantity = quantity * 2;

ALTER stock MODIFY quantity = quantity * 2;

UPDATE stock SET quantity = quantity + 2;

DELETE FROM stock WHERE quantity = quantity * 2;

Delete all records from a table named 'messages' where the 'timestamp' is older than one year.

DELETE FROM messages WHERE timestamp

DELETE FROM messages WHERE timestamp > NOW() - INTERVAL 1 YEAR;

DELETE * FROM messages WHERE timestamp

DELETE FROM messages WHERE timestamp

Create a table named 'orders' with columns 'order_id' (int), 'customer_id' (int), and 'order_date' (date).

CREATE TABLE orders (order_id INT, customer_id INT, order_date DATE);

CREATE orders (order_id INT, customer_id INT, order_date DATE);

CREATE TABLE orders (order_id VARCHAR, customer_id INT, order_date DATE);

CREATE TABLE order (order_id INT, customer_id INT, order_date DATE);

Alter the table 'students' to add a new column 'grade' (int) to store student grades.

ALTER TABLE students ADD grade INT;

UPDATE students SET grade = INT;

ADD COLUMN grade INT TO students;

Select the 'product_name' and 'unit_price' columns from a table named 'products' where 'category' is 'electronics'.

SELECT product_name, unit_price FROM products WHERE category = 'electronics';

SELECT product_name, category FROM products WHERE category = 'electronics';

SELECT product_name, unit_price FROM products WHERE category = 'appliances';

SELECT product_name, unit_price FROM products WHERE category = 'furniture';

Update the 'status' column in a table named 'tasks' to set all values to 'completed'.

UPDATE tasks SET status = 'completed';

UPDATE tasks SET status = 'cancelled';

UPDATE tasks SET status = 'pending';

UPDATE tasks SET status = 'in progress';

Delete all records from a table named 'logs' where the 'severity' is 'low'.

DELETE FROM logs WHERE severity = 'low';

DROP logs WHERE severity = 'low';

REMOVE FROM logs WHERE severity = 'low';

DELETE * FROM logs WHERE severity = 'low';

How can you update the 'price' column in a table named 'products' to set all values to 50?

UPDATE products SET price = 50;

UPDATE products SET price = '50';

ALTER TABLE products SET price = 50;

Create a SQL query to create a table named 'employees' with columns 'emp_id' (int), 'emp_name' (varchar), and 'emp_salary' (decimal).

CREATE TABLE employees (emp_id INT, emp_name VARCHAR(255), emp_salary DECIMAL(10,2));

CREATE TABLE employees (emp_id INT, emp_name VARCHAR(255), emp_salary VARCHAR);

CREATE TABLE employees (emp_id INT, emp_name DECIMAL, emp_salary VARCHAR(255));

CREATE TABLE employees (emp_id VARCHAR, emp_name INT, emp_salary DECIMAL(10,2));

Write a SQL query to create a table named 'departments' with columns 'dept_id' (int), 'dept_name' (varchar), and 'manager_id' (int).

CREATE TABLE departments (dept_id INT, dept_name VARCHAR(255), manager_id INT);

CREATE TABLE departments (dept_id VARCHAR, dept_name INT, manager_id DECIMAL(10,2));

CREATE TABLE departments (dept_id INT, dept_name DECIMAL, manager_id VARCHAR(255));

CREATE TABLE departments (dept_id DECIMAL, dept_name VARCHAR(255), manager_id INT);

What is the SQL query to update the 'quantity' column in a table named 'inventory' to reduce all values by 10%?

UPDATE inventory SET quantity = quantity * 0.9;

UPDATE inventory SET quantity = quantity - 10%;

ALTER TABLE inventory MODIFY quantity = quantity * 0.9;

UPDATE inventory SET quantity = quantity - 10;

Write a SQL query to select the 'product_name' and 'unit_price' columns from a table named 'products' where 'category' is 'clothing'.

SELECT product_name, unit_price FROM products WHERE category = 'clothing';

SELECT product_name, category FROM products WHERE category = 'clothing';

SELECT product_name, unit_price FROM products WHERE category = 'electronics';

SELECT product_name, unit_price FROM products WHERE category = 'furniture';

Update the 'status' column in a table named 'tasks' to set all values to 'in progress'.

UPDATE tasks SET status = 'in progress';

UPDATE tasks SET status = 'completed';

UPDATE tasks SET status = 'cancelled';

UPDATE tasks SET status = 'pending';

What is the SQL query to update the 'quantity' column in a table named 'inventory' to increase all values by 20%?

UPDATE inventory SET quantity = quantity * 1.2;

UPDATE inventory SET quantity = quantity + 20%;

ALTER TABLE inventory MODIFY quantity = quantity * 1.2;

UPDATE inventory SET quantity = quantity + 20;

Write a SQL query to select the 'title' and 'author' columns from a table named 'books' where 'genre' is 'fiction'.

SELECT title, author FROM books WHERE genre = 'fiction';

SELECT title, author FROM books WHERE genre = 'non-fiction';

SELECT title, author FROM books WHERE genre = 'mystery';

SELECT title, author FROM books WHERE genre = 'thriller';

What is the SQL query to delete all records from a table named 'students' where the 'grade' is below 60?

DELETE FROM students WHERE grade

DELETE * FROM students WHERE grade

REMOVE FROM students WHERE grade

Create a SQL query to add a new column 'email' (varchar) to an existing table named 'users'.

ALTER TABLE users ADD email VARCHAR;

ADD COLUMN email VARCHAR TO users;

UPDATE users SET email = 'New Email';

CREATE NEW COLUMN email IN users;

What is the SQL query to update the 'price' column in a table named 'products' to increase all values by 10%?

UPDATE products SET price = price * 1.1;

UPDATE products SET price = price + 10%;

ALTER TABLE products MODIFY price = price * 1.1;

UPDATE products SET price = price + 10;

How can you delete a column 'phone' (varchar) from an existing table named 'contacts'?

ALTER TABLE contacts DROP COLUMN phone;

DELETE COLUMN phone FROM contacts;

Write a SQL query to select the 'name' and 'age' columns from a table named 'users' where 'gender' is 'female'.

SELECT name, age FROM users WHERE gender = 'female';

SELECT name, age FROM users WHERE gender = 'male';

SELECT name, age FROM users WHERE gender = 'other';

SELECT name, age FROM users WHERE gender = 'unknown';

SQL Query Quiz

12th Grade

•

30 Qs

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SQL Query Quiz

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Computers

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12th Grade

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Practice Problem

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Easy

KAREN TAN

Used 3+ times

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SELECT name, salary FROM employees WHERE department = 'Finance';

SELECT name, salary FROM employees WHERE department = 'HR';

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