Podcast Beta
Questions and Answers
Which command is used to create a new table named 'students' with columns for student_id, name, and enrollment_date?
What command should you use to modify the 'orders' table by adding a column called 'order_status'?
What command should you execute to remove a record from the 'inventory' table where the product_id is 10?
Which command would you use to grant a user named 'manager' permission to update records in the 'sales' table?
Signup and view all the answers
Which SQL command will you use to select all records from the 'employees' table where the hire_date is after January 1, 2020?
Signup and view all the answers
What command should you use to drop the 'departments' table from the database?
Signup and view all the answers
What is the appropriate command to update the email field of a user in the 'users' table where the user_id is 3?
Signup and view all the answers
Which command would you choose to revoke SELECT permission from a user named 'guest' on the 'products' table?
Signup and view all the answers
Study Notes
Creating Tables
-
CREATE TABLE students (student_id INT, name VARCHAR(255), enrollment_date DATE);creates a table namedstudentswith columns for student ID (integer), name (string), and enrollment date.
Modifying Tables
-
ALTER TABLE orders ADD COLUMN order_status VARCHAR(255);adds anorder_statuscolumn (string) to theorderstable.
Deleting Records
-
DELETE FROM inventory WHERE product_id = 10;removes the record withproduct_id10 from theinventorytable.
Granting Permissions
-
GRANT UPDATE ON sales TO manager;grants the usermanagerpermission to update thesalestable.
Selecting Records with Conditions
-
SELECT * FROM employees WHERE hire_date > '2020-01-01';selects all records fromemployeeswhere thehire_dateis after January 1, 2020.
Dropping Tables
-
DROP TABLE departments;removes thedepartmentstable from the database.
Updating Records
-
UPDATE users SET email = '[email protected]' WHERE user_id = 3;updates the email address for the user withuser_id3 in theuserstable.
Revoking Permissions
-
REVOKE SELECT ON products FROM guest;removesSELECTpermission from the usergueston theproductstable.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge of SQL commands, including creating tables, modifying structures, deleting records, and managing permissions. This quiz covers essential SQL operations and conditions necessary for database management.
