diff --git a/README.md b/README.md
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--- a/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# rgncycle-db
-
-db for regional cycle
\ No newline at end of file
diff --git a/doc/connect2db.md b/doc/connect2db.md
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+* establisch a SSH tunnel like this:\
+```
+ssh -L <local port>:<local host address>:<remote port> -p <SSH port of remote SSH server> <user at remote server>@<host name of remote server>
+```
+* connect to database using pgsl CLI tool like this:\
+```
+psql -h localhost -p 5432 -U <user> -d <db>
+```
diff --git a/doc/create-db.md b/doc/create-db.md
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+++ b/doc/create-db.md
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+* create `entities` table
+```
+./script/create-entities-table.sh
+```
diff --git a/readme.md b/readme.md
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index 0000000..766bfc2
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,3 @@
+* connect to database like [this](./doc/connect2db.md)
+
+* create initial database like [this](./doc/create-db.md)
\ No newline at end of file
diff --git a/script/create-entities-table.sh b/script/create-entities-table.sh
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--- /dev/null
+++ b/script/create-entities-table.sh
@@ -0,0 +1,34 @@
+#!/bin/bash
+#
+echo "Started..."
+#Started...
+DB_NAME="osm_poi"
+DB_USER="osm_poi"
+HIS_HOST="zvbn-his.de"
+HIS_USER="zvbn_steckbrief"
+HIS_DB="his"
+#
+#import P+R and B+R data from HIS into tabelle infra.brpr
+psql -d $DB_NAME -U $DB_USER -c "DELETE FROM infra.brpr;"
+psql -h $HIS_HOST -U $HIS_USER -d $HIS_DB -f /home/${DB_USER}/sql/poi/export_pr_br_02.sql| psql -U $DB_USER -d $DB_NAME -c "COPY infra.brpr(id,kat,name,strasse,plz,gemeinde_his,gemeinde,landkreis,x_gk3,y_gk3,anlage_erkennbar,stellplaetze,emob,betreiber,linien) FROM STDIN WITH DELIMITER AS '|' CSV  ;"
+#
+psql -U $DB_USER -f /home/${DB_USER}/sql/poi/vw_poi_fahrplaner_17.sql -d $DB_NAME
+psql -U $DB_USER -c 'DROP VIEW IF EXISTS public.vw_export_poi;' -d $DB_NAME
+psql -U $DB_USER -c 'DROP TABLE IF EXISTS public.tbl_poi_fahrplaner;' -d $DB_NAME
+psql -U $DB_USER -c 'CREATE TABLE tbl_poi_fahrplaner AS SELECT * FROM vw_poi_fahrplaner;' -d $DB_NAME
+#TODO What is the reason for the following instruction?
+psql -U $DB_USER -c 'CREATE INDEX ind_gemeinde ON public.tbl_poi_fahrplaner USING btree (gemeinde)' -d $DB_NAME
+#
+#create VIEW public.vw_export_poi for the POI export(OSM, BR, PR, VVK)
+psql -U $DB_USER -d $DB_NAME -f /home/${DB_USER}/sql/poi/gesamtexport_poi_br_pr_vv_10.sql
+#
+#create exports (second call is for Leaflet map view which uses different separators)
+psql -U $DB_USER -d $DB_NAME -c "COPY (SELECT * FROM public.vw_export_poi) TO STDOUT WITH DELIMITER AS ';' CSV  HEADER NULL '' QUOTE '\"';" -o /home/${DB_USER}/osm_poi/osm_poi.csv
+#TODO Required? psql -U $DB_USER -d $DB_NAME -c "COPY (SELECT * FROM public.vw_export_poi) TO STDOUT WITH DELIMITER AS '^' CSV HEADER NULL '' QUOTE '\"' FORCE QUOTE website,oeffnungszeiten;" -o /home/${DB_USER}/osm_poi/osm_poi_ll.csv
+#
+#copy files from tmp folder to server main folger
+cp /home/${DB_USER}/osm_poi/osm_poi.csv /var/www/poi_utf8_demo.csv
+#TODO Required? cp /home/${DB_USER}/osm_poi/osm_poi_ll.csv /var/www/osm_poi_ll_utf8.csv
+#
+echo "Done."
+#done.
diff --git a/script/create-relation_roles-table.sh b/script/create-relation_roles-table.sh
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index 0000000..838ed52
--- /dev/null
+++ b/script/create-relation_roles-table.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+#
+echo "Started..."
+#Started...
+DB_NAME="todo"
+DB_USER="todo"
+#
+psql -h localhost -p 5432 -U $DB_USER -f ./sql/create-relation_roles-table.sql -d $DB_NAME
+#
+echo "Done."
+#Done.
diff --git a/script/create-relations-table.sh b/script/create-relations-table.sh
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index 0000000..edbb52b
--- /dev/null
+++ b/script/create-relations-table.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+#
+echo "Started..."
+#Started...
+DB_NAME="todo"
+DB_USER="todo"
+#
+psql -h localhost -p 5432 -U $DB_USER -f ./sql/create-relations-table.sql -d $DB_NAME
+#
+echo "Done."
+#Done.
diff --git a/sql/create-entities-table.sql b/sql/create-entities-table.sql
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index 0000000..dfb7d23
--- /dev/null
+++ b/sql/create-entities-table.sql
@@ -0,0 +1,6 @@
+---
+DROP TABLE IF EXISTS entities;
+---
+CREATE TABLE IF NOT EXISTS entities(
+   id BIGSERIAL PRIMARY KEY,
+   name TEXT NOT NULL);
diff --git a/sql/create-relation_roles-table.sql b/sql/create-relation_roles-table.sql
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index 0000000..4285ffc
--- /dev/null
+++ b/sql/create-relation_roles-table.sql
@@ -0,0 +1,13 @@
+---
+DROP TABLE IF EXISTS relation_roles;
+---
+CREATE TABLE IF NOT EXISTS relation_roles(
+   id BIGSERIAL PRIMARY KEY,
+   name TEXT NOT NULL);
+---
+DELETE FROM relation_roles;
+INSERT INTO relation_roles (name)
+VALUES
+('supplier'),
+('customer')
+RETURNING *;
diff --git a/sql/create-relations-table.sql b/sql/create-relations-table.sql
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index 0000000..4dd48a3
--- /dev/null
+++ b/sql/create-relations-table.sql
@@ -0,0 +1,11 @@
+---
+DROP TABLE IF EXISTS relations;
+---
+CREATE TABLE IF NOT EXISTS relations(
+   id BIGSERIAL PRIMARY KEY,
+   relation_role BIGINT NOT NULL,
+   from_entity BIGINT NOT NULL,
+   to_entity BIGINT NOT NULL,
+   FOREIGN KEY(relation_role) REFERENCES relation_roles(id),
+   FOREIGN KEY(to_entity) REFERENCES entities(id),
+   FOREIGN KEY(from_entity) REFERENCES entities(id));