elena belykh
22 lines
618 B
SQL
22 lines
618 B
SQL
--Задача 1211
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SELECT
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query_name,
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ROUND(AVG(rating * 1.0 / position), 2) AS quality,
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ROUND(AVG(CASE WHEN rating < 3 THEN 1 ELSE 0 END) * 100,2) AS poor_query_percentage
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FROM Queries
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GROUP BY query_name;
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--Задача 1193
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SELECT
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TO_CHAR(trans_date, 'YYYY-MM') AS month,
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country,
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COUNT(*) AS trans_count,
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SUM(CASE WHEN state = 'approved' THEN 1 ELSE 0 END) AS approved_count,
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SUM(amount) AS trans_total_amount,
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SUM(CASE WHEN state = 'approved' THEN amount ELSE 0 END) AS approved_total_amount
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FROM Transactions
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GROUP BY
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TO_CHAR(trans_date, 'YYYY-MM'),
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country;
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