6lab_DONE!

Lab/Lab#6/lab6.sql

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+CREATE OR REPLACE PROCEDURE update_salary() AS $$
+DECLARE
+   emp_record bd6_employees%ROWTYPE;
+   counter integer := 0;
+   min_salary bd6_employees.salary_in_euro%TYPE;
+   max_salary bd6_employees.salary_in_euro%TYPE;
+BEGIN
+  -- SELECT MIN(salary_in_euro), MAX(salary_in_euro) INTO min_salary, max_salary FROM bd6_employees;
+   
+   FOR emp_record IN
+   SELECT * FROM (SELECT * FROM bd6_employees ORDER BY salary_in_euro LIMIT 3) AS min_salaries
+   LOOP
+      DELETE FROM bd6_employees WHERE id = emp_record.id;
+      counter := counter + 1;
+   END LOOP;
+   FOR emp_record IN
+   SELECT * FROM (SELECT * FROM bd6_employees ORDER BY salary_in_euro DESC LIMIT 3) AS max_salaries
+   LOOP
+      UPDATE bd6_employees SET salary_in_euro = salary_in_euro + min_salary WHERE id = emp_record.id;
+      counter := counter + 1;
+   END LOOP;
+   
+   RAISE NOTICE 'Successfully updated % bd6_employees.', counter;
+END $$ LANGUAGE plpgsql;
+CALL update_salary();
+
+CREATE OR REPLACE PROCEDURE update_and_delete_salaries() AS $$
+BEGIN
+    -- Увеличение заработной платы
+    WITH lowest_salaries AS (
+        SELECT id, salary_in_euro
+        FROM bd6_employees
+        ORDER BY salary_in_euro
+        LIMIT 10
+    ), highest_salary AS (
+        SELECT max(salary_in_euro) AS max_salary
+        FROM bd6_employees
+    )
+    UPDATE bd6_employees e
+    SET salary_in_euro = e.salary_in_euro + ls.salary_in_euro - (SELECT max_salary FROM highest_salary)
+    FROM lowest_salaries ls
+    WHERE e.id = ls.id;
+
+    -- Удаление сотрудников
+    DELETE FROM bd6_employees WHERE id IN (SELECT id FROM lowest_salaries);
+
+    RAISE NOTICE 'Salaries updated and lowest paid bd6_employees deleted.';
+END;
+$$ LANGUAGE plpgsql;