Dataford
Interview QuestionsInterview GuidesExperiencesMock InterviewsPricing
Get started

SQL Query for Data Extraction

EasySQL · PostgreSQL00:00
Practice interviewer
In session
5 left
00:00

Your question is SQL Query for Data Extraction. Start with the requirements and the one table on the right.

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

You need to log in / sign up to run or submit.

Problem

Write a SQL query to extract specific data from a database.

Using the supplied market_observations table, return CME observations with a closing price of at least 100. Include the requested columns and sort the results chronologically, using the instrument symbol as the tie-breaker.

Output

  1. One row per qualifying observation.
  2. Columns: instrument, observation_date, and close_price.
  3. Include only CME rows with close_price >= 100.
  4. Order by observation_date ascending, then instrument ascending.

Schema

market_observations
ColumnTypeDescription
observation_idPKINTUnique observation identifier
instrumentVARCHAR(20)Market instrument symbol
observation_dateDATEDate of the market observation
venueVARCHAR(20)Trading venue
close_priceNUMERIC(12,4)Closing price for the observation
Tablesmarket_observations
Your solutionPostgreSQL
You need to log in / sign up to run or submit.
Run a query to see results