new

Lab/Lab#5/lab5.sql

@@ -1,6 +1,6 @@
 SELECT * 
 FROM bd_employees 
-WHERE last_name ~ '^[a-zA-Z]+-[a-zA-Z]+$';
+WHERE last_name ~ '^[a-zA-Z]+[-[a-zA-Z]]{0,}';
 
 SELECT * 
 FROM bd_employees
@@ -18,19 +18,29 @@ SELECT last_name,
 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');
+SET department = (SELECT department_name FROM departments WHERE department_id = 60) 
+WHERE department in (
+	SELECT department_name
+	FROM departments
+	WHERE department_id in (
+		SELECT department_id
+		FROM employees
+		WHERE manager_id = (
+			SELECT employee_id 
+			FROM employees
+			WHERE first_name = 'Neena' AND last_name= '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;
+WITH tmp AS 
+	(
+	SELECT
+	last_name,
+	(REGEXP_MATCHES(LOWER(last_name), '[a-z]', 'g'))[1] AS l,
+	COUNT(*)*(ASCII((REGEXP_MATCHES(LOWER(last_name), '[a-z]', 'g'))[1]) - 96) AS cnt_l
+	FROM bd_employees
+	GROUP BY last_name, l
+	)
+SELECT last_name, sum(cnt_l) FROM tmp GROUP BY last_name;