diff --git a/DataMigration.py b/DataMigration.py
new file mode 100644
index 0000000..b2551e1
--- /dev/null
+++ b/DataMigration.py
@@ -0,0 +1,220 @@
+from datetime import datetime, timedelta
+from time import time
+from collections import defaultdict
+import sqlite3
+import signal
+
+old_db = sqlite3.connect("..\\NewSquadsMonitor\\squads.sqlite")
+old_db.row_factory = lambda c, r: dict(zip([col[0] for col in c.description], r))
+# old_db.row_factory = sqlite3.Row
+
+new_db = sqlite3.connect('jubilant-system.sqlite')
+new_db.row_factory = lambda c, r: dict(zip([col[0] for col in c.description], r))
+# new_db.row_factory = sqlite3.Row
+
+
+class QUERIES:
+    class NEW:
+        SCHEMA = ''.join(open('sql\\schema.sql', mode='r').readlines())
+
+        CREATE_OPERATION_ID = 'insert into operations_info (squad_id, timestamp) values (:squad_id, :timestamp);'
+        GET_OPERATION_ID = 'select operation_id from operations_info order by operation_id desc limit 1;'
+
+        INSERT_DELETED_SQUAD = 'insert into squadrons_deleted (operation_id, squad_id) VALUES (:operation_id, :squad_id);'
+        IS_DELETED = 'select count(*) as deleted from squadrons_deleted where squad_id = :squad_id;'
+
+        INSERT_INFO = """INSERT INTO squadrons_historical_data (
+operation_id,
+name,
+tag,
+owner_name,
+owner_id,
+platform,
+created,
+created_ts,
+accepting_new_members,
+power_id,
+power_name,
+superpower_id,
+superpower_name,
+faction_id,
+faction_name,
+user_tags,
+member_count,
+pending_count,
+"full", 
+public_comms,
+public_comms_override,
+public_comms_available,
+current_season_trade_score,
+previous_season_trade_score,
+current_season_combat_score,
+previous_season_combat_score,
+current_season_exploration_score,
+previous_season_exploration_score,
+current_season_cqc_score,
+previous_season_cqc_score,
+current_season_bgs_score,
+previous_season_bgs_score,
+current_season_powerplay_score,
+previous_season_powerplay_score,
+current_season_aegis_score,
+previous_season_aegis_score
+) values (
+:operation_id,
+:name,
+:tag,
+:owner_name,
+:owner_id,
+:platform,
+:created,
+:created_ts,
+:accepting_new_members,
+:power_id,
+:power_name,
+:super_power_id,
+:super_power_name,
+:faction_id,
+:faction_name,
+:user_tags,
+:member_count,
+:pending_count,
+:full, 
+:public_comms,
+:public_comms_override,
+:public_comms_available,
+:current_season_trade_score,
+:previous_season_trade_score,
+:current_season_combat_score,
+:previous_season_combat_score,
+:current_season_exploration_score,
+:previous_season_exploration_score,
+:current_season_cqc_score,
+:previous_season_cqc_score,
+:current_season_bgs_score,
+:previous_season_bgs_score,
+:current_season_powerplay_score,
+:previous_season_powerplay_score,
+:current_season_aegis_score,
+:previous_season_aegis_score
+);"""
+
+        INSERT_NEWS = """INSERT INTO squadrons_news_historical (
+        operation_id, 
+        type_of_news, 
+        news_id, 
+        date, 
+        category, 
+        activity, 
+        season, 
+        bookmark, 
+        motd, 
+        author, 
+        cmdr_id, 
+        user_id
+        ) values (
+        :operation_id,
+        :type_of_news,
+        :news_id,
+        :date,
+        :category,
+        :activity,
+        :season,
+        :bookmark,
+        :motd,
+        :author,
+        :cmdr_id,
+        :user_id
+        );"""
+
+    class OLD:
+        ALL_RECORDS = 'select * from squads_states order by inserted_timestamp;'
+        NEWS_IN_TIME_BOUND = '''select * 
+        from news 
+        where squad_id = :squad_id and 
+        inserted_timestamp between :low_bound and :high_bound and
+        category = 'Squadrons_History_Category_PublicStatement' and
+        "date" is not null and
+        type_of_news = 'public_statements';'''
+        ALL_NEWS_RECORDS = '''select * 
+        from news
+        where 
+        category = 'Squadrons_History_Category_PublicStatement' and
+        "date" is not null and
+        type_of_news = 'public_statements';'''
+
+
+exiting: bool = False
+
+
+def exit_handler(_, __):
+    global exiting
+    exiting = True
+
+
+signal.signal(signal.SIGINT, exiting)
+signal.signal(signal.SIGTERM, exiting)
+
+
+def allocate_operation_id(_squad_id: int, _timestamp: str) -> int:
+    new_db.execute(QUERIES.NEW.CREATE_OPERATION_ID, {'squad_id': _squad_id, 'timestamp': _timestamp})
+    return new_db.execute(QUERIES.NEW.GET_OPERATION_ID).fetchone()['operation_id']
+
+
+new_db.executescript(QUERIES.NEW.SCHEMA)
+
+news: dict[int, list[dict]] = defaultdict(list)
+news_cache_timer = time()
+for one_news in old_db.execute(QUERIES.OLD.ALL_NEWS_RECORDS):
+    news[one_news['squad_id']].append(one_news)
+
+print(f'news cached for {time() - news_cache_timer} s')
+
+iterations_counter = 1
+loop_timer = time()
+loop_timer_secondary = time()
+
+row: dict
+for row in old_db.execute(QUERIES.OLD.ALL_RECORDS):
+    if exiting:
+        break
+
+    squad_id: int = row['squad_id']
+    # print(f'Processing: {squad_id}')
+    timestamp: str = row['inserted_timestamp']
+    if row['tag'] is None:
+        # "Deleted" record for squad_id
+        if new_db.execute(QUERIES.NEW.IS_DELETED, {'squad_id': squad_id}).fetchone()['deleted'] == 0:
+            # with new_db:
+            operation_id = allocate_operation_id(squad_id, timestamp)
+            new_db.execute(QUERIES.NEW.INSERT_DELETED_SQUAD, {'operation_id': operation_id, 'squad_id': squad_id})
+
+    else:
+        # it's usual update/first update record
+        # with new_db:
+        operation_id = allocate_operation_id(squad_id, timestamp)
+        row['operation_id'] = operation_id
+        new_db.execute(
+            QUERIES.NEW.INSERT_INFO,
+            row
+        )
+        parsed_timestamp = datetime.strptime(timestamp, '%Y-%m-%d %H:%M:%S')
+        delta = timedelta(minutes=1)
+        low_bound = parsed_timestamp - delta
+        high_bound = parsed_timestamp + delta
+
+        for one_squad_news in news[squad_id]:
+            if low_bound < datetime.strptime(one_squad_news['inserted_timestamp'], '%Y-%m-%d %H:%M:%S') < high_bound:
+                one_squad_news['operation_id'] = operation_id
+                new_db.execute(QUERIES.NEW.INSERT_NEWS, one_squad_news)
+                break
+
+    if iterations_counter % 1000 == 0:
+        new_db.commit()
+        print(f'Iterations: {iterations_counter}; avg iteration time: {(time() - loop_timer)/iterations_counter} s; avg local iter time {(time() - loop_timer_secondary)/1000} s')
+        loop_timer_secondary = time()
+
+    iterations_counter += 1
+
+new_db.commit()
+print(f'Iterations: {iterations_counter}; avg total iter time: {(time() - loop_timer)/iterations_counter} s')
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..771d483
--- /dev/null
+++ b/main.py
@@ -0,0 +1,25 @@
+"""
+Workflow to discover new squadrons (db operations):
+1. Get next id
+2. Query info endpoint
+3. If squadron exists:
+    Insert squad_id into operations_info
+    get operation_id
+    Insert into squadrons_historical_data data from info endpoint
+    Insert into squadrons_news_historical data from news endpoint
+
+else:
+    ignore, don't insert squad_id to squadrons_deleted
+
+Workflow to update existing squadron:
+1. Get most early updated squad from squadrons_current_data
+2. Insert squad_id into operations_info
+3. Get operation_id
+4. Request info endpoint
+    if squad exists:
+        query news endpoint
+        insert data from info and news queries to appropriate historical tables
+
+    else:
+        insert squad_id, operations_id to squadrons_deleted
+"""
\ No newline at end of file
diff --git a/sql/build_squadrons_current_data.sql b/sql/build_squadrons_current_data.sql
new file mode 100644
index 0000000..1e6ebd8
--- /dev/null
+++ b/sql/build_squadrons_current_data.sql
@@ -0,0 +1,61 @@
+BEGIN;
+delete from squadrons_current_data;
+insert into squadrons_current_data
+select
+       squad_id,
+       name,
+       tag,
+       owner_id,
+       owner_name,
+       platform,
+       created,
+       created_ts,
+       accepting_new_members,
+       power_id,
+       power_name,
+       superpower_id,
+       superpower_name,
+       faction_id,
+       faction_name,
+       delete_after,
+       credits_balance,
+       credits_in,
+       credits_out,
+       user_tags,
+       member_count,
+       online_count,
+       pending_count,
+       "full",
+       public_comms,
+       public_comms_override,
+       public_comms_available,
+       current_season_trade_score,
+       previous_season_trade_score,
+       current_season_combat_score,
+       previous_season_combat_score,
+       current_season_exploration_score,
+       previous_season_exploration_score,
+       current_season_cqc_score,
+       previous_season_cqc_score,
+       current_season_bgs_score,
+       previous_season_bgs_score,
+       current_season_powerplay_score,
+       previous_season_powerplay_score,
+       current_season_aegis_score,
+       previous_season_aegis_score,
+       motd,
+       author,
+       cmdr_id,
+       user_id,
+       news_id,
+       "date",
+       squadrons_historical_data.operation_id as operation_id,
+       max(timestamp) as updated
+from squadrons_historical_data
+    inner join operations_info oi
+        on oi.operation_id = squadrons_historical_data.operation_id
+    left join squadrons_news_historical snh
+        on oi.operation_id = snh.operation_id
+where squad_id not in (select squad_id from squadrons_deleted)
+group by squad_id;
+COMMIT;
\ No newline at end of file
diff --git a/sql/schema.sql b/sql/schema.sql
new file mode 100644
index 0000000..fac98e3
--- /dev/null
+++ b/sql/schema.sql
@@ -0,0 +1,308 @@
+create table if not exists settings (
+    key varchar(25) primary key not null,
+    int_value int,
+    txt_value text
+);
+
+create table if not exists operations_info (
+    operation_id integer primary key autoincrement not null,
+    "timestamp" datetime default current_timestamp,
+    squad_id integer
+);
+
+insert into settings (key, int_value) values ('disable_triggers', 1) on conflict do nothing;
+
+create table if not exists squadrons_news_historical (
+    operation_id integer,
+    type_of_news text,
+    news_id int,
+    "date" int,
+    category text,
+    activity text,
+    season int,
+    bookmark text,
+    motd text,
+    author text,
+    cmdr_id int,
+    user_id int,
+    foreign key (operation_id) references operations_info(operation_id)
+);
+
+create table if not exists squadrons_historical_data (
+    operation_id integer,
+    name text,
+    tag text,
+    owner_id integer,
+    owner_name text,
+    platform text,
+    created text,
+    created_ts int,
+    accepting_new_members bool,
+    power_id int,
+    power_name text,
+    superpower_id int,
+    superpower_name text,
+    faction_id int,
+    faction_name text,
+    delete_after text,
+    credits_balance int,
+    credits_in int,
+    credits_out int,
+    user_tags text,
+    member_count int,
+    online_count int,
+    pending_count int,
+    "full" bool,
+    public_comms bool,
+    public_comms_override bool,
+    public_comms_available bool,
+    current_season_trade_score int,
+    previous_season_trade_score int,
+    current_season_combat_score int,
+    previous_season_combat_score int,
+    current_season_exploration_score int,
+    previous_season_exploration_score int,
+    current_season_cqc_score int,
+    previous_season_cqc_score int,
+    current_season_bgs_score int,
+    previous_season_bgs_score int,
+    current_season_powerplay_score int,
+    previous_season_powerplay_score int,
+    current_season_aegis_score int,
+    previous_season_aegis_score int,
+    foreign key (operation_id) references operations_info(operation_id)
+);
+
+create table if not exists squadrons_deleted(
+    operation_id int,
+    squad_id int primary key not null,
+    foreign key (operation_id) references operations_info(operation_id)
+);
+
+create table if not exists squadrons_current_data(
+    squad_id int primary key not null,
+    name text,
+    tag text,
+    owner_id integer,
+    owner_name text,
+    platform text,
+    created text,
+    created_ts int,
+    accepting_new_members bool,
+    power_id int,
+    power_name text,
+    superpower_id int,
+    superpower_name text,
+    faction_id int,
+    faction_name text,
+    delete_after text,
+    credits_balance int,
+    credits_in int,
+    credits_out int,
+    user_tags text,
+    member_count int,
+    online_count int,
+    pending_count int,
+    "full" bool,
+    public_comms bool,
+    public_comms_override bool,
+    public_comms_available bool,
+    current_season_trade_score int,
+    previous_season_trade_score int,
+    current_season_combat_score int,
+    previous_season_combat_score int,
+    current_season_exploration_score int,
+    previous_season_exploration_score int,
+    current_season_cqc_score int,
+    previous_season_cqc_score int,
+    current_season_bgs_score int,
+    previous_season_bgs_score int,
+    current_season_powerplay_score int,
+    previous_season_powerplay_score int,
+    current_season_aegis_score int,
+    previous_season_aegis_score int,
+    motd text,
+    author text,
+    cmdr_id int,
+    user_id int,
+    news_id int,
+    "date" int,
+    operation_id int,
+    updated text,
+    foreign key (operation_id) references operations_info(operation_id)
+);
+
+create trigger if not exists tgr_squadron_deleted
+    after insert on squadrons_deleted
+    when (select int_value from settings where key = 'disable_triggers') != 1
+begin
+    delete from squadrons_current_data where squadrons_current_data.squad_id = new.squad_id;
+end;
+
+create trigger if not exists tgr_squadron_data_updated
+    after insert on squadrons_historical_data
+    when (select int_value from settings where key = 'disable_triggers') != 1
+begin
+    insert into squadrons_current_data (
+        squad_id,
+        operation_id,
+        name,
+        tag,
+        owner_id,
+        owner_name,
+        platform,
+        created,
+        created_ts,
+        accepting_new_members,
+        power_id,
+        power_name,
+        superpower_id,
+        superpower_name,
+        faction_id,
+        faction_name,
+        delete_after,
+        credits_balance,
+        credits_in,
+        credits_out,
+        user_tags,
+        member_count,
+        online_count,
+        pending_count,
+        "full",
+        public_comms,
+        public_comms_override,
+        public_comms_available,
+        current_season_trade_score,
+        previous_season_trade_score,
+        current_season_combat_score,
+        previous_season_combat_score,
+        current_season_exploration_score,
+        previous_season_exploration_score,
+        current_season_cqc_score,
+        previous_season_cqc_score,
+        current_season_bgs_score,
+        previous_season_bgs_score,
+        current_season_powerplay_score,
+        previous_season_powerplay_score,
+        current_season_aegis_score,
+        previous_season_aegis_score,
+        updated) values (
+    (select squad_id from operations_info where operations_info.operation_id = new.operation_id),
+    new.operation_id,
+    new.name,
+    new.tag,
+    new.owner_id,
+    new.owner_name,
+    new.platform,
+    new.created,
+    new.created_ts,
+    new.accepting_new_members,
+    new.power_id,
+    new.power_name,
+    new.superpower_id,
+    new.superpower_name,
+    new.faction_id,
+    new.faction_name,
+    new.delete_after,
+    new.credits_balance,
+    new.credits_in,
+    new.credits_out,
+    new.user_tags,
+    new.member_count,
+    new.online_count,
+    new.pending_count,
+    new."full",
+    new.public_comms,
+    new.public_comms_override,
+    new.public_comms_available,
+    new.current_season_trade_score,
+    new.previous_season_trade_score,
+    new.current_season_combat_score,
+    new.previous_season_combat_score,
+    new.current_season_exploration_score,
+    new.previous_season_exploration_score,
+    new.current_season_cqc_score,
+    new.previous_season_cqc_score,
+    new.current_season_bgs_score,
+    new.previous_season_bgs_score,
+    new.current_season_powerplay_score,
+    new.previous_season_powerplay_score,
+    new.current_season_aegis_score,
+    new.previous_season_aegis_score,
+    (select timestamp from operations_info where operations_info.operation_id = new.operation_id)) on conflict do update set
+        name = new.name,
+        tag = new.tag,
+        owner_id = new.owner_id,
+        owner_name = new.owner_name,
+        platform = new.platform,
+        created = new.created,
+        created_ts = new.created_ts,
+        accepting_new_members = new.accepting_new_members,
+        power_id = new.power_id,
+        power_name = new.power_name,
+        superpower_id = new.superpower_id,
+        superpower_name = new.superpower_name,
+        faction_id = new.faction_id,
+        faction_name = new.faction_name,
+        delete_after = new.delete_after,
+        credits_balance = new.credits_balance,
+        credits_in = new.credits_in,
+        credits_out = new.credits_out,
+        user_tags = new.user_tags,
+        member_count = new.member_count,
+        online_count = new.online_count,
+        pending_count = new.pending_count,
+        "full" = new."full",
+        public_comms = new.public_comms,
+        public_comms_override = new.public_comms_override,
+        public_comms_available = new.public_comms_available,
+        current_season_trade_score = new.current_season_trade_score,
+        previous_season_trade_score = new.previous_season_trade_score,
+        current_season_combat_score = new.current_season_combat_score,
+        previous_season_combat_score = new.previous_season_combat_score,
+        current_season_exploration_score = new.current_season_exploration_score,
+        previous_season_exploration_score = new.previous_season_exploration_score,
+        current_season_cqc_score = new.current_season_cqc_score,
+        previous_season_cqc_score = new.previous_season_cqc_score,
+        current_season_bgs_score = new.current_season_bgs_score,
+        previous_season_bgs_score = new.previous_season_bgs_score,
+        current_season_powerplay_score = new.current_season_powerplay_score,
+        previous_season_powerplay_score = new.previous_season_powerplay_score,
+        current_season_aegis_score = new.current_season_aegis_score,
+        previous_season_aegis_score =  new.previous_season_aegis_score;
+
+end;
+
+create trigger if not exists tgr_squadron_news_updated
+    after insert on squadrons_news_historical
+    when (select int_value from settings where key = 'disable_triggers') != 1
+begin
+    insert into squadrons_current_data (
+        motd,
+        author,
+        cmdr_id,
+        user_id,
+        news_id,
+        "date",
+        squad_id,
+        operation_id,
+        updated
+        ) values
+    (
+     new.motd,
+     new.author,
+     new.cmdr_id,
+     new.user_id,
+     new.news_id,
+     new.date,
+     (select squad_id from operations_info where operations_info.operation_id = new.operation_id),
+     new.operation_id,
+     (select timestamp from operations_info where operations_info.operation_id = new.operation_id)
+     ) on conflict do update set
+    motd = new.motd,
+    author = new.author,
+    cmdr_id = new.cmdr_id,
+    user_id = new.user_id,
+    news_id = new.news_id,
+    "date" = new.date;
+end;
\ No newline at end of file