diff --git a/db/mysql-with-inserts.sql b/db/mysql-with-inserts.sql
index 7c0a69cad0ea5f69219a5e9b8e0ec3bb467f4dd7..088d807e70c310f7458312360b2e5a84eddd2199 100644
--- a/db/mysql-with-inserts.sql
+++ b/db/mysql-with-inserts.sql
@@ -2,14 +2,14 @@ CREATE DATABASE `daaexample`;
 
 CREATE TABLE `daaexample`.`people` (
 	`id` int NOT NULL AUTO_INCREMENT,
-	`name` varchar(50) DEFAULT NULL,
-	`surname` varchar(100) DEFAULT NULL,
+	`name` varchar(50) NOT NULL,
+	`surname` varchar(100) NOT NULL,
 	PRIMARY KEY (`id`)
 );
 
 CREATE TABLE `daaexample`.`users` (
 	`login` varchar(100) NOT NULL,
-	`password` varchar(64) DEFAULT NULL,
+	`password` varchar(64) NOT NULL,
 	PRIMARY KEY (`login`)
 );
 
diff --git a/db/mysql.sql b/db/mysql.sql
index a7d1c3e8aa925ef999e0d6cc8e0f3cc46bfc0ad6..136d89403668f24c92fb6a328855b0db3536a59f 100644
--- a/db/mysql.sql
+++ b/db/mysql.sql
@@ -2,15 +2,15 @@ CREATE DATABASE `daaexample`;
 
 CREATE TABLE `daaexample`.`people` (
 	`id` int NOT NULL AUTO_INCREMENT,
-	`name` varchar(50) DEFAULT NULL,
-	`surname` varchar(100) DEFAULT NULL,
+	`name` varchar(50) NOT NULL,
+	`surname` varchar(100) NOT NULL,
 	PRIMARY KEY (`id`)
 );
 
 CREATE TABLE `daaexample`.`users` (
 	`login` varchar(100) NOT NULL,
-	`password` varchar(64) DEFAULT NULL,
+	`password` varchar(64) NOT NULL,
 	PRIMARY KEY (`login`)
 );
 
-GRANT ALL ON `daaexample`.* TO 'daa'@'localhost' IDENTIFIED BY 'daa';
\ No newline at end of file
+GRANT ALL ON `daaexample`.* TO 'daa'@'localhost' IDENTIFIED BY 'daa';