add 5lab

Lab/Lab#5/lab5.sql

@@ -0,0 +1,36 @@
+SELECT * 
+FROM bd_employees 
+WHERE last_name ~ '^[a-zA-Z]+-[a-zA-Z]+$';
+
+SELECT * 
+FROM bd_employees
+WHERE department_id IN (
+	SELECT id
+	FROM bd_departments
+	WHERE street ~ '^[A-Za-z\s]+$'
+);
+
+
+SELECT last_name, 
+       CASE WHEN phone_number LIKE '+7%' 
+	   THEN CONCAT('8', SUBSTRING(phone_number, 3)) 
+	   ELSE phone_number END AS phone 
+FROM bd_employees;
+
+UPDATE staff 
+SET department = '60' 
+WHERE id = (
+	SELECT manager_id 
+	FROM employees 
+	WHERE first_name LIKE 'Neena' AND last_name LIKE 'Kochhar');
+	
+SELECT *
+FROM bd_employees
+WHERE LENGTH(REGEXP_REPLACE(first_name, '[^aeiouAEIOU]', '', 'g')) <= 3;
+
+WITH tmp AS (
+	SELECT chr(i+96), i FROM generate_series(1,26) i)
+SELECT e.last_name sum(t.i) AS name_sum
+FROM db_employees e
+JOIN tmp t ON t.chr = ANY(string_to_array(LOWER(e.last_name), NULL))
+GROUP BY e.last_name;