diff --git a/config/database.yml b/config/database.yml
new file mode 100644
index 00000000..c21e3f65
--- /dev/null
+++ b/config/database.yml
@@ -0,0 +1,30 @@
+# SQLite is enabled by default. Remember to change the dbfile path.
+production:
+  adapter: sqlite
+  dbfile: /tmp/instiki_prod.db
+
+# Uncomment this section for MySQL:
+# production:
+#   adapter: mysql
+#   host: localhost
+#   database: instiki
+#   username: instiki
+#   password: pass
+
+# Uncomment this section for PostgreSQL:
+# production:
+#   adapter: postgresql
+#   host: localhost
+#   database: instiki
+#   username: instiki
+#   password: pass
+
+# The following settings are only used for testing and development.
+development:
+  adapter: sqlite
+  dbfile: /tmp/instiki_dev.db
+
+test:
+  adapter: sqlite
+  dbfile: /tmp/instiki_test.db
+
diff --git a/db/pages.erbsql b/db/pages.erbsql
new file mode 100644
index 00000000..afc57484
--- /dev/null
+++ b/db/pages.erbsql
@@ -0,0 +1,6 @@
+CREATE TABLE pages (
+  id <%= @pk %>,
+  created_at <%= @datetime %> NOT NULL,
+  updated_at <%= @datetime %> NOT NULL,
+  web_id INTEGER NOT NULL
+) <%= create_options %>;
diff --git a/db/revisions.erbsql b/db/revisions.erbsql
new file mode 100644
index 00000000..1639cf2e
--- /dev/null
+++ b/db/revisions.erbsql
@@ -0,0 +1,7 @@
+CREATE TABLE revisions (
+  id <%= @pk %>,
+  created_at <%= @datetime %> NOT NULL,
+  updated_at <%= @datetime %> NOT NULL,
+  page_id INTEGER NOT NULL,
+  content TEXT NOT NULL
+) <%= create_options %>;
diff --git a/db/webs.erbsql b/db/webs.erbsql
new file mode 100644
index 00000000..24ebc04a
--- /dev/null
+++ b/db/webs.erbsql
@@ -0,0 +1,7 @@
+CREATE TABLE pages (
+  id <%= @pk %>,
+  created_at <%= @datetime %> NOT NULL,
+  updated_at <%= @datetime %> NOT NULL,
+  name VARCHAR(60) NOT NULL,
+  address VARCHAR(60) NOT NULL
+) <%= create_options %>;
diff --git a/lib/db_structure.rb b/lib/db_structure.rb
new file mode 100644
index 00000000..0a2c4beb
--- /dev/null
+++ b/lib/db_structure.rb
@@ -0,0 +1,32 @@
+require 'erb'
+
+def create_options
+  if @db == 'mysql'
+    'ENGINE = ' + (mysql_engine rescue @mysql_engine)
+  end
+end
+
+def db_structure(db)
+  db.downcase!
+  @db = db
+  case db
+  when 'postgresql'
+    @pk = 'SERIAL PRIMARY KEY'
+    @datetime = 'TIMESTAMP'
+  when 'sqlite', 'sqlite3'
+    @pk = 'INTEGER PRIMARY KEY'
+    @datetime = 'DATETIME'
+  when 'mysql'
+    @pk = 'INTEGER UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY'
+    @datetime = 'DATETIME'
+    @mysql_engine = 'InnoDB'
+  else
+    raise "Unknown db type #{db}"
+  end
+
+  s = ''
+  Dir['db/*.erbsql'].each do |filename|
+    s += ERB.new(File.read(filename)).result
+  end
+  s
+end