Code reviewMediumcr-g117

Subject Data bugsLevel Mid–Senior~25 minCommon in Databases & SQL interviewsIndustries Software development

Question

Review this Go code computing an average rating from rows.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix — specific and kind.

Learn the concepts

Talk through your review

Code to reviewgo

1type Review struct{ Rating sql.NullInt64 }2 3func avgRating(reviews []Review) float64 {4    var sum int645    for _, r := range reviews {6        sum += r.Rating.Int647    }8    return float64(sum) / float64(len(reviews))9}

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