Project Operator in KQL

Correct Answer: A.

Option A is correct.

Project operators control what columns to include, add, remove or rename in the result set of a statement.

Option B is incorrect.

The where operator filters a table to the subset of rows that satisfy a predicate.

Option C is incorrect.

Extend operators can't use aggregate functions.

Option D is incorrect.

Reference:

The Project operator in Kusto Query Language (KQL) is used to add, remove, or rename columns in the result set of a query. The operator allows you to modify the output of a query to suit your specific needs.

Option A is correct as it accurately describes the Project operator. When used in a query, the Project operator can add new columns to the result set, remove unwanted columns, or rename existing columns. This flexibility allows you to fine-tune the output of a query to display only the information that is relevant to your needs.

Option B is incorrect. The Filter operator is used to remove rows from a table based on specified conditions. It does not modify the columns in the result set.

Option C is incorrect. While the Project operator can create new columns, it does not specifically create "precised" columns. The columns that are created depend on the expressions that are used in the projection.

Therefore, the correct answer is A.