CRUD stands for "Create, Read, Update, and Delete", and it refers to the basic operations that can be performed on a database. Let's go through each one. First, to "create" a record in a database, we can use the "INSERT" statement. For example, to insert a new user into the database, we could write the following SQL statement:
INSERT INTO users (username, password) VALUES ('username', 'password');
This statement would create a new record in the "users" table, with the given username and password.
Next, to "read" a record from a database, we can use the "SELECT" statement. For example, to read the record for a specific user, we could write the following SQL statement:
SELECT * FROM users WHERE username = 'username';
This statement would return all of the information for the user with the given username.
Let's move on to "update". To update a record in a database, we can use the "UPDATE" statement. For example, to update the password for a specific user, we could write the following SQL statement:
UPDATE users SET password = 'new_password' WHERE username = 'username';
This statement would update the password for the user with the given username.
Now, to "delete" a record from a database, we can use the "DELETE" statement. For example, to delete a user from the database, we could write the following SQL statement:
DELETE FROM users WHERE username = 'username';
This statement would delete the user with the given username from the "users" table. We've covered the four basic CRUD operations!
CRUD stands for "Create, Read, Update, and Delete", and it refers to the basic operations that can be performed on a database. Let's go through each one. First, to "create" a record in a database, we can use the "INSERT" statement. For example, to insert a new user into the database, we could write the following SQL statement: INSERT INTO users (username, password) VALUES ('username', 'password'); This statement would create a new record in the "users" table, with the given username and password. Next, to "read" a record from a database, we can use the "SELECT" statement. For example, to read the record for a specific user, we could write the following SQL statement: SELECT * FROM users WHERE username = 'username'; This statement would return all of the information for the user with the given username. Let's move on to "update". To update a record in a database, we can use the "UPDATE" statement. For example, to update the password for a specific user, we could write the following SQL statement: UPDATE users SET password = 'new_password' WHERE username = 'username'; This statement would update the password for the user with the given username. Now, to "delete" a record from a database, we can use the "DELETE" statement. For example, to delete a user from the database, we could write the following SQL statement: DELETE FROM users WHERE username = 'username'; This statement would delete the user with the given username from the "users" table. We've covered the four basic CRUD operations!