diff --git a/db.sql b/db.sql
new file mode 100644
index 0000000..d024cff
--- /dev/null
+++ b/db.sql
@@ -0,0 +1,350 @@
+--
+-- PostgreSQL database dump
+--
+
+-- Dumped from database version 15.12 (Debian 15.12-0+deb12u2)
+-- Dumped by pg_dump version 15.12 (Debian 15.12-0+deb12u2)
+
+SET statement_timeout = 0;
+SET lock_timeout = 0;
+SET idle_in_transaction_session_timeout = 0;
+SET client_encoding = 'UTF8';
+SET standard_conforming_strings = on;
+SELECT pg_catalog.set_config('search_path', '', false);
+SET check_function_bodies = false;
+SET xmloption = content;
+SET client_min_messages = warning;
+SET row_security = off;
+
+--
+-- Name: dbo; Type: SCHEMA; Schema: -; Owner: KhasanovAM
+--
+
+CREATE SCHEMA dbo;
+
+
+ALTER SCHEMA dbo OWNER TO "KhasanovAM";
+
+--
+-- Name: pgcrypto; Type: EXTENSION; Schema: -; Owner: -
+--
+
+CREATE EXTENSION IF NOT EXISTS pgcrypto WITH SCHEMA dbo;
+
+
+--
+-- Name: EXTENSION pgcrypto; Type: COMMENT; Schema: -; Owner: 
+--
+
+COMMENT ON EXTENSION pgcrypto IS 'cryptographic functions';
+
+
+SET default_tablespace = '';
+
+SET default_table_access_method = heap;
+
+--
+-- Name: challenges; Type: TABLE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE TABLE dbo.challenges (
+    id integer NOT NULL,
+    name character varying(100) NOT NULL,
+    description text,
+    start_date date NOT NULL,
+    end_date date NOT NULL
+);
+
+
+ALTER TABLE dbo.challenges OWNER TO "KhasanovAM";
+
+--
+-- Name: challenges_id_seq; Type: SEQUENCE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE SEQUENCE dbo.challenges_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+ALTER TABLE dbo.challenges_id_seq OWNER TO "KhasanovAM";
+
+--
+-- Name: challenges_id_seq; Type: SEQUENCE OWNED BY; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER SEQUENCE dbo.challenges_id_seq OWNED BY dbo.challenges.id;
+
+
+--
+-- Name: nutrition; Type: TABLE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE TABLE dbo.nutrition (
+    id integer NOT NULL,
+    user_id integer,
+    date date NOT NULL,
+    calories integer,
+    protein double precision,
+    carbs double precision,
+    fats double precision
+);
+
+
+ALTER TABLE dbo.nutrition OWNER TO "KhasanovAM";
+
+--
+-- Name: nutrition_id_seq; Type: SEQUENCE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE SEQUENCE dbo.nutrition_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+ALTER TABLE dbo.nutrition_id_seq OWNER TO "KhasanovAM";
+
+--
+-- Name: nutrition_id_seq; Type: SEQUENCE OWNED BY; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER SEQUENCE dbo.nutrition_id_seq OWNED BY dbo.nutrition.id;
+
+
+--
+-- Name: sports; Type: TABLE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE TABLE dbo.sports (
+    id integer NOT NULL,
+    name character varying(50) NOT NULL
+);
+
+
+ALTER TABLE dbo.sports OWNER TO "KhasanovAM";
+
+--
+-- Name: sports_id_seq; Type: SEQUENCE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE SEQUENCE dbo.sports_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+ALTER TABLE dbo.sports_id_seq OWNER TO "KhasanovAM";
+
+--
+-- Name: sports_id_seq; Type: SEQUENCE OWNED BY; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER SEQUENCE dbo.sports_id_seq OWNED BY dbo.sports.id;
+
+
+--
+-- Name: users; Type: TABLE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE TABLE dbo.users (
+    id integer NOT NULL,
+    username character varying(50) NOT NULL,
+    email character varying(100) NOT NULL,
+    password_hash character varying(255) NOT NULL,
+    created_at timestamp without time zone DEFAULT CURRENT_TIMESTAMP
+);
+
+
+ALTER TABLE dbo.users OWNER TO "KhasanovAM";
+
+--
+-- Name: users_id_seq; Type: SEQUENCE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE SEQUENCE dbo.users_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+ALTER TABLE dbo.users_id_seq OWNER TO "KhasanovAM";
+
+--
+-- Name: users_id_seq; Type: SEQUENCE OWNED BY; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER SEQUENCE dbo.users_id_seq OWNED BY dbo.users.id;
+
+
+--
+-- Name: workouts; Type: TABLE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE TABLE dbo.workouts (
+    id integer NOT NULL,
+    user_id integer,
+    sport_id integer,
+    date date NOT NULL,
+    duration integer NOT NULL,
+    intensity character varying(20),
+    notes text
+);
+
+
+ALTER TABLE dbo.workouts OWNER TO "KhasanovAM";
+
+--
+-- Name: workouts_id_seq; Type: SEQUENCE; Schema: dbo; Owner: KhasanovAM
+--
+
+CREATE SEQUENCE dbo.workouts_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+ALTER TABLE dbo.workouts_id_seq OWNER TO "KhasanovAM";
+
+--
+-- Name: workouts_id_seq; Type: SEQUENCE OWNED BY; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER SEQUENCE dbo.workouts_id_seq OWNED BY dbo.workouts.id;
+
+
+--
+-- Name: challenges id; Type: DEFAULT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.challenges ALTER COLUMN id SET DEFAULT nextval('dbo.challenges_id_seq'::regclass);
+
+
+--
+-- Name: nutrition id; Type: DEFAULT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.nutrition ALTER COLUMN id SET DEFAULT nextval('dbo.nutrition_id_seq'::regclass);
+
+
+--
+-- Name: sports id; Type: DEFAULT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.sports ALTER COLUMN id SET DEFAULT nextval('dbo.sports_id_seq'::regclass);
+
+
+--
+-- Name: users id; Type: DEFAULT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.users ALTER COLUMN id SET DEFAULT nextval('dbo.users_id_seq'::regclass);
+
+
+--
+-- Name: workouts id; Type: DEFAULT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.workouts ALTER COLUMN id SET DEFAULT nextval('dbo.workouts_id_seq'::regclass);
+
+
+--
+-- Name: challenges challenges_pkey; Type: CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.challenges
+    ADD CONSTRAINT challenges_pkey PRIMARY KEY (id);
+
+
+--
+-- Name: nutrition nutrition_pkey; Type: CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.nutrition
+    ADD CONSTRAINT nutrition_pkey PRIMARY KEY (id);
+
+
+--
+-- Name: sports sports_pkey; Type: CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.sports
+    ADD CONSTRAINT sports_pkey PRIMARY KEY (id);
+
+
+--
+-- Name: users users_email_key; Type: CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.users
+    ADD CONSTRAINT users_email_key UNIQUE (email);
+
+
+--
+-- Name: users users_pkey; Type: CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.users
+    ADD CONSTRAINT users_pkey PRIMARY KEY (id);
+
+
+--
+-- Name: users users_username_key; Type: CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.users
+    ADD CONSTRAINT users_username_key UNIQUE (username);
+
+
+--
+-- Name: workouts workouts_pkey; Type: CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.workouts
+    ADD CONSTRAINT workouts_pkey PRIMARY KEY (id);
+
+
+--
+-- Name: nutrition nutrition_user_id_fkey; Type: FK CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.nutrition
+    ADD CONSTRAINT nutrition_user_id_fkey FOREIGN KEY (user_id) REFERENCES dbo.users(id) ON DELETE CASCADE;
+
+
+--
+-- Name: workouts workouts_sport_id_fkey; Type: FK CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.workouts
+    ADD CONSTRAINT workouts_sport_id_fkey FOREIGN KEY (sport_id) REFERENCES dbo.sports(id) ON DELETE CASCADE;
+
+
+--
+-- Name: workouts workouts_user_id_fkey; Type: FK CONSTRAINT; Schema: dbo; Owner: KhasanovAM
+--
+
+ALTER TABLE ONLY dbo.workouts
+    ADD CONSTRAINT workouts_user_id_fkey FOREIGN KEY (user_id) REFERENCES dbo.users(id) ON DELETE CASCADE;
+
+
+--
+-- PostgreSQL database dump complete
+--
+