text: set IDENTITY_INSERT institutes ON
  insert into institutes (id,name) values (1,'Example')
  set IDENTITY_INSERT institutes OFF
  
  set IDENTITY_INSERT persons ON
  insert into persons (id,name,surname,password) values (1,'Mitya','Kovalev','mit')
  insert into persons (id,name,surname) values (2,'Torvlobnor','Puzdoy')
  insert into persons (id,name,surname) values (3,'Akakiy','Zinberstein')
  set IDENTITY_INSERT persons OFF
  
  set IDENTITY_INSERT phones ON
  insert into phones (id,phone,pers_id) values (1,'332-2334',1)
  insert into phones (id,phone,pers_id) values (2,'222-3234',1)
  insert into phones (id,phone,pers_id) values (3,'545-4563',2)
  set IDENTITY_INSERT phones OFF
  
  set IDENTITY_INSERT documents ON
  insert into documents (id,abstract,title) values (1,'abstract1','book1')
  insert into documents (id,abstract,title) values (2,'abstract2','book2')
  set IDENTITY_INSERT documents OFF
  
  insert into authors_docs (pers_id,doc_id) values (1,1)
  insert into authors_docs (pers_id,doc_id) values (1,2)
  insert into authors_docs (pers_id,doc_id) values (2,1)
  