Query Planning & Statistics (EXPLAIN ANALYZE) Quiz Home › PostgreSQL DBA › Query Planning & Statistics (EXPLAIN ANALYZE) 🔍 Postgres Database Administration – Query Planning & Statistics (EXPLAIN ANALYZE) 20 questions · 15 min timer · Explanations included · Free 1. What is the primary purpose of using the EXPLAIN ANALYZE command in PostgreSQL? To execute a query and provide the execution plan with actual run times. To backup the database schema and data. To optimize the database by automatically creating indexes. To generate a visual representation of the database schema. None 1 out of 20 2. Which of the following can cause the query planner to choose a nested loop join over a hash join? The presence of a large number of NULL values in the join columns. The absence of indexes on the join columns. The use of a complex WHERE clause. A small number of rows in one of the tables being joined. None 2 out of 20 Loading questions... 3 out of 20 Loading questions... 4 out of 20 Loading questions... 5 out of 20 Loading questions... 6 out of 20 Loading questions... 7 out of 20 Loading questions... 8 out of 20 Loading questions... 9 out of 20 Loading questions... 10 out of 20 Loading questions... 11 out of 20 Loading questions... 12 out of 20 Loading questions... 13 out of 20 Loading questions... 14 out of 20 Loading questions... 15 out of 20 Loading questions... 16 out of 20 Loading questions... 17 out of 20 Loading questions... 18 out of 20 Loading questions... 19 out of 20 Loading questions... 20 out of 20 Click Submit to see your final score! Previous Start Quiz Next Time's up
