diff --git a/backend/main.py b/backend/main.py
index 1bc3a38..b56ff48 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1,4 +1,6 @@
 import psycopg2
+from bson import ObjectId
+from psycopg2 import sql
 from pymongo import MongoClient
 
 
@@ -7,14 +9,108 @@ def get_database():
     return client['documents']
 
 
-if __name__ == "__main__":
+def create_document(document):
     dbname = get_database()
-    print(dbname['docs'].find_one())
+    docs_coll = dbname['docs']
+    docs_coll.insert_one(document)
+
+
+def get_document_by_id(id):
+    dbname = get_database()
+    docs_coll = dbname['docs']
+    return docs_coll.find({"_id": id})
+
+
+def get_document_by_name(name):
+    dbname = get_database()
+    docs_coll = dbname['docs']
+    return docs_coll.find({"name": name})
+
+
+def edit_data(id, data):
+    dbname = get_database()
+    docs_coll = dbname['docs']
+    docs_coll.update_one({"_id": id}, {"$set": {"data": data}})
+
+
+def edit_access(id, access):
+    dbname = get_database()
+    docs_coll = dbname['docs']
+    docs_coll.update_one({"_id": id}, {"$set": {"access": access}})
+
+
+def edit_name(id, name):
+    dbname = get_database()
+    docs_coll = dbname['docs']
+    docs_coll.update_one({"_id": id}, {"$set": {"name": name}})
+
+
+def create_table(name):
+    cur = conn.cursor()
+    cur.execute(sql.SQL("CREATE TABLE {table} ()").format(table=sql.Identifier(name)))
+
+
+def add_column(name, column, type):
+    cur = conn.cursor()
+    cur.execute(sql.SQL("ALTER TABLE {table} ADD {column}" + type).format(
+        table=sql.Identifier(name),
+        column=sql.Identifier(column))
+    )
+
+
+def insert_column(name, column, data):
+    pass
+
+
+def insert_columns(name, columns, data):
+    pass
+
+
+def edit_column(name, column, data):
+    pass
+
+
+def edit_columns(name, columns, data):
+    pass
+
+
+def remove_column(name, column):
+    pass
+
+
+def create_sort(name):
+    cur = conn.cursor()
+    cur.execute(
+        sql.SQL("CREATE TABLE {table} (property TEXT, _order CHAR(3), priority int)").format(
+            table=sql.Identifier(name + "_sort")
+        )
+    )
+
+
+def add_sort(name, property, order, priority):
+    cur = conn.cursor()
+    cur.execute(
+        sql.SQL("INSERT INTO {table} VALUES (%s, %s, %s)").format(table=sql.Identifier(name + "_sort")),
+        (property, order, priority)
+    )
+
+
+def sort():
+    pass
+
+
+def add_filter():
+    pass
+
+
+conn = None
+
+if __name__ == "__main__":
     conn = psycopg2.connect(
         host="localhost",
         database="bd2",
         user="root",
         password="password")
-    cur = conn.cursor()
-    cur.execute('SELECT version()')
-    print(cur.fetchone())
+
+    conn.commit()
+