MySQL Table Management Quiz

Modifying and managing database tables is an essential skill when working with MySQL. This quiz will test your knowledge of key concepts such as altering table structures, adding and deleting columns, renaming tables, and duplicating data. You will also explore how to safely modify table data while preserving constraints and avoiding errors. Answer the following questions to assess your understanding of updating and managing MySQL tables effectively.

How can you rename a column in MySQL?

MODIFY COLUMN old_name TO new_name;

RENAME COLUMN product.old_name TO new_name;

UPDATE TABLE product SET COLUMN old_name = new_name;

ALTER TABLE product CHANGE old_name new_name data_type;

None

What is the correct way to change a column's data type?

ALTER TABLE product MODIFY price DECIMAL(10,2);

RENAME COLUMN product.price DECIMAL(10,2);

ALTER TABLE product CHANGE price DECIMAL(10,2);

UPDATE TABLE product SET price TYPE DECIMAL(10,2);

None

Which SQL statement renames an existing table?

CHANGE TABLE

MODIFY TABLE

ALTER TABLE RENAME TO

RENAME TABLE

None

What will the following SQL command do?

 ALTER TABLE product ADD on_sale BOOL;

Add a new column named ‘on_sale’ with a boolean data type

Modify an existing column named ‘on_sale’

Delete the ‘on_sale’ column

Rename the table to ‘on_sale’

None

Which keyword is used to add a new column to a table?

MODIFY

ADD

INSERT

NEW COLUMN

None

Which statement ensures that the duplicated table retains its structure, including constraints?

CREATE TABLE new_table LIKE old_table; INSERT INTO new_table SELECT * FROM old_table;

BACKUP TABLE old_table TO new_table;

COPY TABLE old_table TO new_table;

CREATE TABLE new_table AS SELECT * FROM old_table;

None

Which keyword is used to move a column to a specific position in a table?

MOVE

RELOCATE

POSITION

FIRST or AFTER

None

If a table contains data and you attempt to shorten a column's length, what might happen?

Data will be automatically truncated

The column will be shortened without issues

Only new rows will be affected

An error will occur if data exceeds the new length

None

Which of the following is true about MySQL table modifications?

Once a column is added, it cannot be removed

Renaming a table deletes its data

ALTER TABLE is used to modify tables

Tables cannot be modified after creation

None

10.

Which SQL statement is used to modify the structure of an existing table?

ALTER TABLE

UPDATE TABLE

CHANGE TABLE

MODIFY TABLE

None

11.

What happens to constraints like PRIMARY KEY when duplicating a table using the following statement?

CREATE TABLE new_table AS SELECT * FROM old_table;

Indexes but not primary keys are copied

Only data is copied, constraints are lost

Only primary keys are preserved

Constraints are preserved

None

12.

How can you duplicate a table in MySQL without copying its data?

CREATE TABLE new_table LIKE old_table;

COPY TABLE old_table TO new_table;

CREATE TABLE new_table AS SELECT * FROM old_table;

DUPLICATE TABLE old_table AS new_table;

None

13.

What will happen if you run the following statement?

ALTER TABLE product DROP COLUMN discount;

The column ‘discount’ will be removed from the ‘product’ table

The table will be deleted

All data in the ‘discount’ column will be cleared but the column remains

An error will occur because columns cannot be deleted

None

14.

Which statement correctly copies all data from one table to another after duplicating its structure?

REPLICATE TABLE old_table AS new_table;

INSERT INTO new_table SELECT * FROM old_table;

COPY TABLE old_table TO new_table;

INSERT INTO new_table VALUES SELECT * FROM old_table;

None

15.

Which SQL statement permanently removes a table from the database?

REMOVE TABLE

DELETE TABLE

TRUNCATE TABLE

DROP TABLE

None

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