diff --git a/schema/changes01.sql b/schema/changes01.sql
new file mode 100644
index 0000000..0c271ed
--- /dev/null
+++ b/schema/changes01.sql
@@ -0,0 +1,6 @@
+alter table premise_t add column account integer;
+alter table premise_t add constraint fk_premise_t_account foreign key (account) references account_t(id);
+alter table premise_t add constraint uk_premise_t_account unique(account);
+alter table account_entry_t add column document_no integer unique;
+create sequence unique_number_s start with 1 increment by 1;
+