diff --git a/postgres/drafts/02_add_datasets.sql b/postgres/drafts/02_add_datasets.sql
new file mode 100644
index 00000000..b5fca0b4
--- /dev/null
+++ b/postgres/drafts/02_add_datasets.sql
@@ -0,0 +1,48 @@
+BEGIN;
+
+--------------------------------------
+-- ICRS: datasets is pretty simple
+-- Probably, it is necessary to add a field "spectral range" (optical, X-ray, radio, etc.)
+--------------------------------------
+
+CREATE TABLE icrs.datasets (
+  id Integer PRIMARY KEY
+, table_id Integer NOT NULL REFERENCES layer0.tables (id) ON DELETE restrict ON UPDATE cascade
+, column_name Text NOT NULL
+, datatype Common.DataType NOT NULL
+) ;
+
+ALTER TABLE icrs.data
+ADD COLUMN dataset_id Integer NOT NULL REFERENCES icrs.datasets(id) ON DELETE restrict ON UPDATE cascade,
+DROP COLUMN modification_time ;
+
+CREATE VIEW icrs.dataview AS
+SELECT
+  r.pgc
+, d.ra
+, d.e_ra
+, d.dec
+, d.e_dec
+, s.datatype
+
+, d.record_id
+, d.dataset_id
+, s.table_id
+, t.table_name
+, s.column_name
+
+, b.code
+, b.year 
+, b.author
+, b.title
+
+, r.modification_time
+FROM
+  icrs.data AS d 
+  LEFT JOIN icrs.datasets  AS s ON (d.dataset_id = s.id )
+  LEFT JOIN layer0.records AS r ON (d.record_id = r.id )
+  LEFT JOIN layer0.tables  AS t ON (d.table_id = t.id )
+  LEFT JOIN common.bib AS b ON (t.bib = b.id )
+;
+
+COMMIT;
\ No newline at end of file
diff --git a/postgres/migrations/V013_pgc.sql b/postgres/migrations/V013_pgc.sql
new file mode 100644
index 00000000..b51f8fcf
--- /dev/null
+++ b/postgres/migrations/V013_pgc.sql
@@ -0,0 +1,67 @@
+BEGIN;
+
+-- ALTER ROLE dim WITH SUPERUSER ;
+
+-------------------------------------------------------------
+-- Сохранять время модификации PGC нет необходимости, 
+-- т.к. есть время привязки объекта с записями и этого достаточно для отслеживания модификаций
+--
+-- добавление нового PGC номера делается командой
+-- INSERT INTO common.pgc DEFAULT VALUES ;
+-------------------------------------------------------------
+
+CREATE TABLE common.pgc (
+  id Serial PRIMARY KEY
+);
+
+COMMENT ON TABLE common.pgc     IS 'The list of existing PGC-numbers' ;
+COMMENT ON COLUMN common.pgc.id IS 'Unique PGC-number' ;
+
+
+--------------------------
+-- Ассоциация записей с PGC номерами переносится в таблицу objects
+--------------------------
+
+ALTER TABLE rawdata.objects 
+ADD COLUMN pgc Integer REFERENCES common.pgc (id) ON DELETE restrict ON UPDATE cascade,
+ADD COLUMN modification_time Timestamp Without Time Zone ;
+
+COMMENT ON TABLE rawdata.objects IS 'The register of all objects in original data tables' ;
+COMMENT ON COLUMN rawdata.objects.id  IS 'The record id' ;
+COMMENT ON COLUMN rawdata.objects.table_id IS 'The table in which the record is located' ;
+COMMENT ON COLUMN rawdata.objects.pgc IS 'Corssidentification of the record with the PGC-number' ;
+COMMENT ON COLUMN rawdata.objects.modification_time IS 'Time of PGC-number assignment to the record' ;
+
+
+---------------------------
+-- Перенос данных
+---------------------------
+
+INSERT INTO common.pgc (id) 
+SELECT id 
+FROM rawdata.pgc 
+ORDER BY rawdata.pgc.id 
+;
+
+ALTER SEQUENCE common.pgc_id_seq RESTART WITH 6775395 ;
+
+UPDATE rawdata.objects
+SET
+  pgc=rawdata.pgc.id
+FROM rawdata.pgc
+WHERE 
+  rawdata.pgc.object_id=rawdata.objects.id
+;
+
+
+--------------------------------------
+-- В дальнейшем нужно будет
+-- 1. Перенести связь между записями и PGC в таблицу objects
+-- 2. Удалить таблицу rawdata.pgc
+-- 3. Перименовать таблицу objects в records
+-- 4. Перенести таблицы records и tables в схему layer0
+--------------------------------------
+
+-- ROLLBACK;
+COMMIT;
+