Coursera课程Python for everyone:Quiz: Single-Table SQL
Single-Table SQL
11 试题
Structured Query Language (SQL) is used to (check all that apply)
Delete data
Check Python code for errors
Create a table
Insert data
Which of these is the right syntax to make a new table?
MAKE DATASET people;
MAKE people;
CREATE TABLE people;
CREATE people;
Which SQL command is used to insert a new row into a table?
INSERT INTO
ADD ROW
INSERT ROW
INSERT AFTER
Which command is used to retrieve all records from a table?
RETRIEVE * FROM Users
RETRIEVE all FROM User
SELECT all FROM Users
SELECT * FROM Users
Which keyword will cause the results of the query to be displayed in sorted order?
GROUP BY
ORDER BY
WHERE
None of these
In database terminology, another word for table is
relation
attribute
field
row
In a typical online production environment, who has direct access to the production database?
Developer
UI/UX Designer
Project Manager
Database Administrator
Which of the following is the database software used in this class?
SQLite
SQL Server
Oracle
MySQL
Postgres
What happens if a DELETE command is run on a table without a WHERE clause?
The first row of the table will be deleted
All the rows in the table are deleted
All the rows without a primary key will be deleted
It is a syntax error
Which of the following commands would update a column named "name" in a table named "Users"?
UPDATE Users (name) VALUES ('new name') WHERE ...
Users->name = 'new name' WHERE ...
Users.name='new name' WHERE ...
UPDATE Users SET name='new name' WHERE ...
What does this SQL command do?
SELECT COUNT(*) FROM Users
Hint: This is not from the lecture
It only retrieves the rows of Users if there are at least two rows
It is a syntax errror
It counts the rows in the table Users
It adds a COUNT column to the Users table
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