Dataford
Interview QuestionsInterview GuidesExperiencesMock InterviewsPricing
Get started

Writing SAS Code Under Pressure

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

Your question is Writing SAS Code Under Pressure. Start with the requirements and the two tables 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

Tell me about a time you had to write SAS code quickly and correctly under pressure, and how you validated the output.

For this SQL-focused exercise, demonstrate the validation portion by comparing source records with derived records and reporting every discrepancy. The result should make expected values, actual values, and discrepancy types explicit.

Output

  1. Return issue_type, record_id, expected_value, and actual_value.
  2. Report missing, unexpected, duplicate, value-mismatch, and status-mismatch records.
  3. Sort by record_id, then issue_type.

Schema

source_records
ColumnTypeDescription
record_idPKINTSource record identifier
subject_codeVARCHAR(20)Subject or record code
baseline_valueDECIMAL(10,2)Baseline numeric value
followup_valueDECIMAL(10,2)Follow-up numeric value
statusVARCHAR(20)Expected record status
derived_records
ColumnTypeDescription
derived_idPKINTDerived row identifier
record_idINTSource record identifier
subject_codeVARCHAR(20)Derived subject or record code
change_valueDECIMAL(10,2)Derived change value
statusVARCHAR(20)Derived record status
Tablessource_recordsderived_records
Your solutionPostgreSQL
You need to log in / sign up to run or submit.
Run a query to see results