Answered

How can you view the structure of a table including all its columns and their data types?

A) SELECT * FROM tablename.
B) SHOW COLUMNS FROM tablename
C) DESCRIBE tablename
D) LIST tablename.

Verified Answer :

audreyn06

Answer: B) SHOW COLUMNS FROM tablename, C) DESCRIBE tablename

Explanation:

Both of these commands provide information about the columns in a table, including their data types, nullability, keys, and other attributes.

  • SHOW COLUMNS FROM tablename displays information about the columns in the specified table, including the column name, type, nullability, key information, default values, and extra information.
  • DESCRIBE tablename provides a description of the table's structure, listing the column names, types, and other attributes in a similar way to SHOW COLUMNS.

Option A (SELECT * FROM tablename) retrieves all rows and columns of data from the table but does not provide metadata about the structure or data types of the columns.

Option D (LIST tablename) is not a standard SQL command for viewing table structure.

B) SHOW COLUMNS FROM tablename, C) DESCRIBE tablename

The command to view the structure of a table, including its columns and their data types, is "DESCRIBE tablename". Other commands like SELECT FROM tablename do not provide this structural information.

To view the structure of a table including all its columns and their data types, you can use the SQL command "DESCRIBE tablename". The other options do not provide the information about column data types as needed. For example, the "SELECT FROM tablename" command only retrieves all rows and columns of data in the table, but does not show the structure or data types.