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.

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

INSERT INTO new_table VALUES SELECT * FROM old_table;

INSERT INTO new_table SELECT * FROM old_table;

COPY TABLE old_table TO new_table;

REPLICATE TABLE old_table AS new_table;

None

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

An error will occur if data exceeds the new length

The column will be shortened without issues

Data will be automatically truncated

Only new rows will be affected

None

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

CREATE TABLE new_table AS SELECT * FROM old_table;

Only data is copied, constraints are lost

Only primary keys are preserved

Constraints are preserved

Indexes but not primary keys are copied

None

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

BACKUP TABLE old_table TO new_table;

COPY TABLE old_table TO new_table;

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

CREATE TABLE new_table AS SELECT * FROM old_table;

None

Which SQL statement permanently removes a table from the database?

REMOVE TABLE

DELETE TABLE

TRUNCATE TABLE

DROP TABLE

None

What will happen if you run the following statement?

ALTER TABLE product DROP COLUMN discount;

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

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

An error will occur because columns cannot be deleted

The table will be deleted

None

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

DUPLICATE TABLE old_table AS new_table;

CREATE TABLE new_table AS SELECT * FROM old_table;

CREATE TABLE new_table LIKE old_table;

COPY TABLE old_table TO new_table;

None

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

RELOCATE

MOVE

POSITION

FIRST or AFTER

None

What will the following SQL command do?

 ALTER TABLE product ADD on_sale BOOL;

Delete the ‘on_sale’ column

Rename the table to ‘on_sale’

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

Modify an existing column named ‘on_sale’

None

10.

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

Tables cannot be modified after creation

ALTER TABLE is used to modify tables

None

11.

How can you rename a column in MySQL?

MODIFY COLUMN old_name TO new_name;

ALTER TABLE product CHANGE old_name new_name data_type;

UPDATE TABLE product SET COLUMN old_name = new_name;

RENAME COLUMN product.old_name TO new_name;

None

12.

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

13.

Which SQL statement renames an existing table?

ALTER TABLE RENAME TO

MODIFY TABLE

RENAME TABLE

CHANGE TABLE

None

14.

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

ADD

INSERT

NEW COLUMN

MODIFY

None

15.

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

MODIFY TABLE

ALTER TABLE

CHANGE TABLE

UPDATE TABLE

None

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