SQL Indexes and Performance | Dataford Interview Questions

What constitutes an index in SQL and what advantages does it provide?

Asked in the first round stage. Answer using the table below as the reference point for your explanation.

Output

indexes_reference

Column	Type	Description
concept_idPK	INT	Primary key for the reference row
concept	VARCHAR(50)	Name of the database concept
advantages	VARCHAR(500)	Short explanation of the benefits

Your question is SQL Indexes and Performance. Start with the requirements and the one table in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

What constitutes an index in SQL and what advantages does it provide?

Asked in the first round stage. Answer using the table below as the reference point for your explanation.

indexes_reference

Column	Type	Description
concept_idPK	INT	Primary key for the reference row
concept	VARCHAR(50)	Name of the database concept
advantages	VARCHAR(500)	Short explanation of the benefits

Your question is SQL Indexes and Performance. Start with the requirements and the one table in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.