runtimetask Indexes · hard
Cover the export query
Create an index so this export is answered from the index alone, then run it: user_id and occurred_at for data_exported events in May 2025.
what to return
- Columns
user_idoccurred_atin this order- Rows
- 592 rows · any order
- Skill
- Serve a query entirely from an index. Refresher: Indexes: observe a real access path →
expected result
Your query should return exactly these columns and values. Run it and compare.
expected result592 rows · any order
| user_id | occurred_at |
|---|---|
| 7747 | 2025-05-01 01:38:15 |
| 8397 | 2025-05-01 02:42:24 |
| 6140 | 2025-05-01 02:53:21 |
first 3 of 592 rows
data you can query
Product / SaaS Analytics dataset: the first 6 rows of each table. Under each column name: the kind of value it holds, and which table it links to. Your queries run on all rows.
events8 columns · 135,428 rows
| delivery_idnumber · unique id | event_idtext | user_idnumber · links to users | account_idnumber · links to accounts | session_idnumber · links to sessions | event_nametext | occurred_atdate & time | received_atdate & time |
|---|---|---|---|---|---|---|---|
| 1 | evt_0000001 | 1 | 1 | 1 | user_signed_up | 2024-01-14 18:52:14 | 2024-01-14 18:52:33 |
| 2 | evt_0000002 | 1 | 1 | 1 | onboarding_started | 2024-01-14 18:52:51 | 2024-01-14 18:53:06 |
| 3 | evt_0000084 | 6 | 2 | 32 | user_signed_up | 2024-01-15 13:21:52 | 2024-01-15 13:22:00 |
| 4 | evt_0000085 | 6 | 2 | 32 | onboarding_started | 2024-01-15 13:22:05 | 2024-01-15 13:22:16 |
| 5 | evt_0000086 | 6 | 2 | 32 | onboarding_completed | 2024-01-15 13:23:52 | 2024-01-15 13:24:12 |
| 6 | evt_0000019 | 1 | 1 | 9 | search_performed | 2024-01-17 20:56:55 | 2024-01-17 20:56:59 |
- delivery_idnumber · unique id
- 1
- event_idtext
- evt_0000001
- user_idnumber · links to users
- 1
- account_idnumber · links to accounts
- 1
- session_idnumber · links to sessions
- 1
- event_nametext
- user_signed_up
- occurred_atdate & time
- 2024-01-14 18:52:14
- received_atdate & time
- 2024-01-14 18:52:33
- delivery_idnumber · unique id
- 2
- event_idtext
- evt_0000002
- user_idnumber · links to users
- 1
- account_idnumber · links to accounts
- 1
- session_idnumber · links to sessions
- 1
- event_nametext
- onboarding_started
- occurred_atdate & time
- 2024-01-14 18:52:51
- received_atdate & time
- 2024-01-14 18:53:06
- delivery_idnumber · unique id
- 3
- event_idtext
- evt_0000084
- user_idnumber · links to users
- 6
- account_idnumber · links to accounts
- 2
- session_idnumber · links to sessions
- 32
- event_nametext
- user_signed_up
- occurred_atdate & time
- 2024-01-15 13:21:52
- received_atdate & time
- 2024-01-15 13:22:00
- delivery_idnumber · unique id
- 4
- event_idtext
- evt_0000085
- user_idnumber · links to users
- 6
- account_idnumber · links to accounts
- 2
- session_idnumber · links to sessions
- 32
- event_nametext
- onboarding_started
- occurred_atdate & time
- 2024-01-15 13:22:05
- received_atdate & time
- 2024-01-15 13:22:16
- delivery_idnumber · unique id
- 5
- event_idtext
- evt_0000086
- user_idnumber · links to users
- 6
- account_idnumber · links to accounts
- 2
- session_idnumber · links to sessions
- 32
- event_nametext
- onboarding_completed
- occurred_atdate & time
- 2024-01-15 13:23:52
- received_atdate & time
- 2024-01-15 13:24:12
- delivery_idnumber · unique id
- 6
- event_idtext
- evt_0000019
- user_idnumber · links to users
- 1
- account_idnumber · links to accounts
- 1
- session_idnumber · links to sessions
- 9
- event_nametext
- search_performed
- occurred_atdate & time
- 2024-01-17 20:56:55
- received_atdate & time
- 2024-01-17 20:56:59
first 6 of 135,428 rows · your queries use all of them
solution.sql
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