If you want to do a datasheet for each feature in a table, then you can use the atlas generation functionality in the print composer.
In the atlas generation tab, set the coverage layer to the layer where you have your features. Make sure you uncheck the Hidden coverage layer box in Visibility. And set the scaling according to your needs.
Entering a new label, you can access your features attribute values by using [%yourFeatureAttributeName%]. See the image below for a example:
You can even render your label as HTML to create a table. Something like this:
After you set the composer layout as you please, all you need is to do is create the outputs or print. You will get one output per feature, the map will be centered or zoomed on each feature, and the labels will show the features attributes.