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SQL vs NoSQL and When to Use
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SQL vs NoSQL and When to Use

EasySQL · PostgreSQL

Problem

Describe the key differences between SQL and NoSQL, and how you decide which one to use for a given problem.

For the hands-on portion, use the provided relational tables to demonstrate a case where SQL is appropriate. Return active engagements with at least two assigned members and their most recent update.

Output

  1. One row per qualifying engagement with engagement_name, member_count, latest_update_status, and latest_update_date.
  2. Include only active engagements with at least two members.
  3. Sort by engagement_name alphabetically.

Schema

projects
ColumnTypeDescription
project_idPKINTUnique engagement identifier
project_nameVARCHAR(100)Engagement name
statusVARCHAR(20)Current engagement status
domainVARCHAR(50)Primary engagement domain
project_members
ColumnTypeDescription
member_idPKINTUnique member assignment identifier
project_idINTReferenced engagement identifier
member_nameVARCHAR(100)Assigned member name
roleVARCHAR(50)Member role on the engagement
project_updates
ColumnTypeDescription
update_idPKINTUnique update identifier
project_idINTReferenced engagement identifier
update_dateDATEDate of the update
update_statusVARCHAR(30)Status recorded in the update
update_noteTEXTOptional update note
Tablesprojectsproject_membersproject_updates
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