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SQL: Throughput by Region
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SQL: Throughput by Region

MediumSQL · PostgreSQL

Problem

Write a SQL query to analyze the B Lab Global certification pipeline by joining application, review, and outcome tables and calculating throughput by region.

Use applications submitted during 2024. Throughput is the percentage of applications with a Certified outcome, and applications without reviews or outcomes must remain included.

Output

  1. One row per region with region, application_count, reviewed_application_count, certified_count, and throughput_pct
  2. Include all 2024 applications, sort by throughput_pct descending, then region ascending

Schema

applications
ColumnTypeDescription
application_idPKINTUnique certification application identifier
organization_nameVARCHAR(150)Applicant organization name
regionVARCHAR(60)Organization region
submitted_atDATEDate the application was submitted
reviews
ColumnTypeDescription
review_idPKINTUnique review identifier
application_idINTApplication being reviewed
review_statusVARCHAR(40)Current review status
completed_atDATEDate the review was completed
outcomes
ColumnTypeDescription
outcome_idPKINTUnique outcome identifier
application_idINTApplication receiving the outcome
outcome_statusVARCHAR(40)Certification outcome status
outcome_dateDATEDate the outcome was recorded
Tablesapplicationsreviewsoutcomes
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Your question is SQL: Throughput by Region. Start with the requirements and the three tables in the Question tab.

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CodePostgreSQL
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