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Top Features Per Account
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Top Features Per Account

MediumSQL · PostgreSQL

Problem

How would you write a query to find the top 3 most used features per customer account using window functions?

Use the account, feature, and feature usage tables. Return only accounts with at least one matched feature usage record. Break usage-count ties alphabetically by feature name.

Output

  1. One row per selected account and feature
  2. Columns: account_id, account_name, feature_name, usage_count, feature_rank
  3. Include ranks 1 through 3, ordered by account_id, feature_rank, and feature_name

Schema

customer_accounts
ColumnTypeDescription
account_idPKINTUnique customer account identifier
account_nameVARCHAR(120)Customer account name
features
ColumnTypeDescription
feature_idPKINTUnique feature identifier
feature_nameVARCHAR(120)Rippling product feature name
feature_usage
ColumnTypeDescription
usage_idPKINTUnique feature usage event identifier
account_idINTCustomer account associated with the event
feature_idINTFeature associated with the event
Tablescustomer_accountsfeaturesfeature_usage
Interviewer

Your question is Top Features Per Account. Start with the requirements and the three tables in the Question tab.

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