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https://github.com/ada-dmitry/DB.mephi_ada.git
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36 lines
829 B
SQL
36 lines
829 B
SQL
SELECT *
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FROM bd_employees
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WHERE last_name ~ '^[a-zA-Z]+-[a-zA-Z]+$';
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SELECT *
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FROM bd_employees
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WHERE department_id IN (
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SELECT id
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FROM bd_departments
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WHERE street ~ '^[A-Za-z\s]+$'
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);
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SELECT last_name,
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CASE WHEN phone_number LIKE '+7%'
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THEN CONCAT('8', SUBSTRING(phone_number, 3))
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ELSE phone_number END AS phone
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FROM bd_employees;
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UPDATE staff
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SET department = '60'
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WHERE id = (
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SELECT manager_id
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FROM employees
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WHERE first_name LIKE 'Neena' AND last_name LIKE 'Kochhar');
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SELECT *
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FROM bd_employees
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WHERE LENGTH(REGEXP_REPLACE(first_name, '[^aeiouAEIOU]', '', 'g')) <= 3;
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WITH tmp AS (
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SELECT chr(i+96), i FROM generate_series(1,26) i)
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SELECT e.last_name sum(t.i) AS name_sum
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FROM db_employees e
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JOIN tmp t ON t.chr = ANY(string_to_array(LOWER(e.last_name), NULL))
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GROUP BY e.last_name; |