Question

Which of the following commands can a data engineer use to create a new table along with a comment ?

a) CREATE TABLE payments COMMENT "This table contains sensitive information" AS SELECT * FROM bank_transactions
b) CREATE TABLE payments COMMENT("This table contains sensitive information") AS SELECT * FROM bank_transactions
c) CREATE TABLE payments AS SELECT * FROM bank_transactions COMMENT "This table contains sensitive information"
d) CREATE TABLE payments AS SELECT * FROM bank_transactions COMMENT("This table contains sensitive information")
e) COMMENT("This table contains sensitive information") CREATE TABLE payments AS SELECT * FROM bank_transactions

Answer 1

The correct command to create a new table with a comment is 'CREATE TABLE payments COMMENT("This table contains sensitive information") AS SELECT * FROM bank_transactions'. This syntax enables a data engineer to document the new table within the database schema effectively.

Step-by-step explanation:

To create a new table with a comment, a data engineer can use SQL syntax which varies slightly depending on the specific database management system. However, most systems follow a similar syntax pattern. The correct command that incorporates a comment when creating a new table in many SQL databases is:

b) CREATE TABLE payments COMMENT("This table contains sensitive information") AS SELECT * FROM bank_transactions

The COMMENT clause allows the data engineer to add a description to the table metadata, which can be valuable for documentation purposes and for other users who interact with the database schema. The comment is enclosed in parenthesis and quotes.