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SQL Second-Highest Credit Score
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SQL Second-Highest Credit Score

MediumSQL · PostgreSQL

Problem

Write a query to find the second-highest credit score from a customer database.

Use the customers and credit_scores tables. Treat the second-highest value as the second-highest distinct non-NULL credit score.

Output

  1. Return one row with the column second_highest_credit_score.
  2. Return no row if fewer than two distinct non-NULL scores exist.

Schema

customers
ColumnTypeDescription
customer_idPKINTEGERUnique customer identifier
customer_nameVARCHAR(100)Customer full name
credit_scores
ColumnTypeDescription
score_idPKINTEGERUnique credit score record identifier
customer_idINTEGERCustomer associated with the score
credit_scoreINTEGERCustomer credit score
Tablescustomerscredit_scores
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CodePostgreSQL
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