refactor for sql

database.sql

@@ -0,0 +1,24 @@
+CREATE TABLE IF NOT EXISTS users (
+    id BIGINT PRIMARY KEY,
+    username VARCHAR(255),
+    first_name VARCHAR(255) NOT NULL,
+    last_name VARCHAR(255),
+    group VARCHAR(255) DEFAULT 'other',
+    timeout INT DEFAULT 10,
+    allow_message BOOLEAN DEFAULT TRUE,
+    thread VARCHAR(255) DEFAULT 'General',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS schedule(
+    id BIGSERIAL PRIMARY KEY,
+    day_of_week VARCHAR(255),
+    begin_time VARCHAR(20),
+    end_time VARCHAR(20),
+    course VARCHAR(255),
+    lector VARCHAR(255),
+    is_lecture BOOLEAN DEFAULT FALSE,
+    room VARCHAR(20),
+    group VARCHAR(10),
+    parity VARCHAR(10),
+);