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https://github.com/ada-dmitry/DB.mephi_ada.git
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ada-dmitry
+21
-11
@@ -1,6 +1,6 @@
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SELECT *
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SELECT *
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FROM bd_employees
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FROM bd_employees
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WHERE last_name ~ '^[a-zA-Z]+-[a-zA-Z]+$';
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WHERE last_name ~ '^[a-zA-Z]+[-[a-zA-Z]]{0,}';
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SELECT *
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SELECT *
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FROM bd_employees
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FROM bd_employees
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@@ -18,19 +18,29 @@ SELECT last_name,
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FROM bd_employees;
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FROM bd_employees;
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UPDATE staff
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UPDATE staff
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SET department = '60'
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SET department = (SELECT department_name FROM departments WHERE department_id = 60)
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WHERE id = (
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WHERE department in (
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SELECT manager_id
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SELECT department_name
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FROM departments
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WHERE department_id in (
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SELECT department_id
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FROM employees
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FROM employees
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WHERE first_name LIKE 'Neena' AND last_name LIKE 'Kochhar');
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WHERE manager_id = (
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SELECT employee_id
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FROM employees
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WHERE first_name = 'Neena' AND last_name= 'Kochhar')));
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SELECT *
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SELECT *
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FROM bd_employees
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FROM bd_employees
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WHERE LENGTH(REGEXP_REPLACE(first_name, '[^aeiouAEIOU]', '', 'g')) <= 3;
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WHERE LENGTH(REGEXP_REPLACE(first_name, '[^aeiouAEIOU]', '', 'g')) <= 3;
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WITH tmp AS (
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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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(
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SELECT e.last_name sum(t.i) AS name_sum
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SELECT
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FROM db_employees e
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last_name,
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JOIN tmp t ON t.chr = ANY(string_to_array(LOWER(e.last_name), NULL))
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(REGEXP_MATCHES(LOWER(last_name), '[a-z]', 'g'))[1] AS l,
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GROUP BY e.last_name;
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COUNT(*)*(ASCII((REGEXP_MATCHES(LOWER(last_name), '[a-z]', 'g'))[1]) - 96) AS cnt_l
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FROM bd_employees
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GROUP BY last_name, l
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)
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SELECT last_name, sum(cnt_l) FROM tmp GROUP BY last_name;
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@@ -0,0 +1,148 @@
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WITH RECURSIVE tmp AS (
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SELECT id, first_name, last_name, manager_id, 1 AS level
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FROM bd6_employees
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WHERE manager_id = 1 OR id = 1
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UNION ALL
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SELECT e.id, e.first_name, e.last_name, e.manager_id, t.level + 1
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FROM bd6_employees e
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JOIN tmp t ON e.manager_id = t.id
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)
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SELECT *
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FROM tmp;
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CREATE OR REPLACE PROCEDURE department_names() AS $$
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DECLARE d_attrs RECORD;
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BEGIN
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FOR d_attrs IN
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WITH RECURSIVE tmp AS (
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SELECT
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id,
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first_name,
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last_name, manager_id,
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1 AS level
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FROM bd6_employees
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WHERE manager_id = 1 or id = 1
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UNION ALL
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SELECT
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e.id,
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e.first_name,
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e.last_name,
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e.manager_id,
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t.level + 1
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FROM bd6_employees e
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JOIN tmp t ON e.manager_id = t.id )
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SELECT * FROM tmp LOOP RAISE INFO ' % % ',
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d_attrs.first_name, d_attrs.last_name;
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END LOOP;
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END $$ LANGUAGE plpgsql;
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CALL department_names();
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DECLARE
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prev_employee NUMBER := 0;
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mod_salary NUMBER;
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BEGIN
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FOR tmp IN (
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SELECT first_name, last_name, salary,
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ROW_NUMBER() OVER (ORDER BY salary) AS salary_rank
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FROM employees
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)
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LOOP
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IF emp.salary_rank = 1 THEN
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modified_salary := FLOOR(emp.salary / 100) * 100; -- округляем до сотен в меньшую сторону
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ELSE
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modified_salary := FLOOR((emp.salary + previous_remainder) / 100) * 100;
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previous_remainder := (emp.salary + previous_remainder) - modified_salary;
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END IF;
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DBMS_OUTPUT.PUT_LINE('Фамилия: ' || emp.last_name || ', Имя: ' || emp.first_name || ', Модифицированная заработная плата: ' || modified_salary);
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END LOOP;
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END;
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CREATE OR REPLACE PROCEDURE f() AS $$
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DECLARE d_attrs RECORD;
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BEGIN
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FOR d_attrs IN
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WITH RECURSIVE tmp AS (
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SELECT i AS f1, i2 AS f2, i3 AS f3,i4 AS f4,i5 AS f5
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FROM generate_series(1,200) i)
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SELECT * FROM tmp LOOP RAISE INFO ' % % % % %',
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d_attrs.f1, d_attrs.f2, d_attrs.f3, d_attrs.f4, d_attrs.f5; END LOOP;
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END $$ LANGUAGE plpgsql;
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CALL f();
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WITH RECURSIVE tmp AS (
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SELECT id, first_name, last_name, manager_id, 1 AS level
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FROM bd6_employees
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WHERE manager_id = 1 OR id = 1
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UNION ALL
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SELECT e.id, e.first_name, e.last_name, e.manager_id, t.level + 1
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FROM bd6_employees e
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JOIN tmp t ON e.manager_id = t.id
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)
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SELECT *
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FROM tmp;
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CREATE OR REPLACE PROCEDURE department_names() AS $$
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DECLARE d_attrs RECORD;
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BEGIN
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FOR d_attrs IN
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WITH RECURSIVE tmp AS (
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SELECT
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id,
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first_name,
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last_name, manager_id,
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1 AS level
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FROM bd6_employees
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WHERE manager_id = 1 or id = 1
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UNION ALL
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SELECT
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e.id,
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e.first_name,
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e.last_name,
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e.manager_id,
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t.level + 1
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FROM bd6_employees e
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JOIN tmp t ON e.manager_id = t.id )
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SELECT * FROM tmp LOOP RAISE INFO ' % % ',
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d_attrs.first_name, d_attrs.last_name;
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END LOOP;
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END $$ LANGUAGE plpgsql;
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CALL department_names();
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CREATE OR REPLACE PROCEDURE modified_salary() AS $$
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DECLARE
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prev_employee numeric := 0;
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mod_salary numeric := (
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SELECT FLOOR(min(salary_in_euro) / 100) * 100
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FROM bd6_employees
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);
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d_attrs RECORD;
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BEGIN
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FOR d_attrs IN WITH tmp AS (
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SELECT first_name, last_name, salary_in_euro
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FROM bd6_employees
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ORDER BY salary_in_euro ASC
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)
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SELECT * FROM tmp
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RAISE INFO ' % % % ',
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d_attrs.last_name,
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d_attrs.first_name,
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mod_salary;
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LOOP
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mod_salary := FLOOR((d_attrs.salary_in_euro + prev_employee) / 100) * 100;
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prev_employee := (d_attrs.salary_in_euro + prev_employee) - mod_salary;
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RAISE INFO ' % % % ',
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d_attrs.last_name,
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d_attrs.first_name,
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mod_salary;
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END LOOP;
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END $$ LANGUAGE plpgsql;
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CALL modified_salary();
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