I have recently installed QGIS-2.2.0 but the Database tab in the top-menu bar is missing. It looks the main reason is missing libgdal1h library. But when I am installing it, it's removing Postgresql-9.3, PostGIS-2.1 and PgAdminIII (which initially asked for libgdal1 library during installation) before installation. I want PostGIS to connect to from QGIS Database tab (Database Manager). I guess, there is a conflict between libgdal1h and libgdal1.
I am on Ubuntu-12.04.