add sql_database and sql files

sql_base/createtables.sql

@@ -0,0 +1,5 @@
+create table login_users (userid integer primary key, name varchar(50), password varchar(50));
+
+create table temp_hum_info (thid integer primary key, temperature double, humidity double, th_date_time datetime);
+
+create table record_of_operations (operid integer primary key, oper_user_name varchar(50), operation_detail text, operation_time datetime);