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SQL Table and Column Modification Quiz

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Questions and Answers

What is the correct SQL statement to rename a table in a database?

RENAME old_table TO new_table;

ALTER old_table RENAME new_table;

RENAME TABLE old_table TO new_table; (correct)

ALTER TABLE old_table RENAME TO new_table;

How do you add a new column to an existing table in SQL?

ADD COLUMN column_name TO table_name;

INSERT INTO table_name (column_name) VALUES (datatype);

ALTER TABLE table_name ADD column_name datatype; (correct)

UPDATE table_name SET column_name = datatype;

What is the correct SQL statement to modify the datatype of a column in a table?

MODIFY COLUMN datatype IN table_name;

ALTER TABLE table_name MODIFY COLUMN column_name datatype; (correct)

UPDATE table_name SET column_name = datatype;

CHANGE COLUMN column_name datatype IN table_name;

Study Notes

Renaming a Table

The correct SQL statement to rename a table is: ALTER TABLE old_table_name RENAME TO new_table_name;

Adding a New Column

To add a new column to an existing table, use the ALTER TABLE statement with the ADD COLUMN clause: ALTER TABLE table_name ADD COLUMN new_column_name data_type;

Modifying a Column's Data Type

To modify the data type of a column, use the ALTER TABLE statement with the MODIFY or ALTER COLUMN clause: ALTER TABLE table_name MODIFY column_name new_data_type; or ALTER TABLE table_name ALTER COLUMN column_name TYPE new_data_type;

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Description

Test your SQL knowledge with this quiz on renaming, adding, and modifying tables and columns. Put your skills to the test with questions on RENAME TABLE, ALTER TABLE - ADD Column, ALTER TABLE - RENAME COLUMN, and ALTER TABLE - ALTER/MODIFY DATATYPE statements.