Accenture Senior Data Engineer Interview Questions and Answers

Parameterized procedures in BigQuery allow for dynamic SQL queries with user-defined parameters.

• Parameterized procedures in BigQuery use variables to pass values into SQL queries.

• They help prevent SQL injection attacks by separating SQL code from user input.

• Parameters can be used in WHERE clauses, JOIN conditions, and other parts of the query.

• Example: CREATE PROCEDURE myProcedure(IN param1 INT64, IN param2 STRING) BEGI...read more

Joins are used to combine data from multiple tables based on a common column.

• Joins are used in SQL to retrieve data from multiple tables based on a related column.

• Common types of joins include inner join, left join, right join, and full outer join.

• Joins can be performed using different algorithms like nested loop join, hash join, and sort merge join.

• Spark provides various join operations like join, crossJoin, and broad...read more