copyfields-attributesintersectionqgis
I have 2 layers that intersect, called layer A and layer B.
Layer A has an attribute (X) that I want to copy wholesale (for the whole layer) to layer B, so that when object A1 intersects object B1, attribute X1 from A1 is copied to B1.
I am trying to do this in QGIS. I used to do this in Mapinfo with an UPDATE query… then I switched to Mac. I am new to QGIS.
If you join two layers, the resulting layer will contain the columns of both input layers. Just join and then use "Save as ..." to save the result to a new file.
To copy features from one shapefile to another you select features from shapefile a and use copy. next step is to activate edit mode in your aimed shapefile b. you can open the attribut table 
next it should look like this 
to check everything went fine, add an area row and calculate the area to make sure there is a geometry added
Best Answer
You need to use
Join attributes by locationfromProcessing Toolbox -> QGIS geoalgorithms -> Vector General tools -> Join attributes by locationwhich allows you to copy the attribute of one of the two layers into the other using variousGeometric Predicatesincludingintersectsandtouchesas you can see below:If you want to transfer all records, even if they is no spatial connection, you need to choose
Keep all records, otherwise you need to chooseOnly keep matching recordslocated under Joined Table.