join txt files with shapefiles in QGIS

You will see how to add a shapefile to qgis and how to join this shape with some txt information provided by another file.
the second part is about visualizing this information in qgis by changing a field type in the new sahpefile.

[iliasmachairas]

Thanks a lot, especially for the to-real function for string fields (6:00-7:40).

[maureengundlach]

Great, clear tutorial, and just what I was looking for.  Thanks!  

[claralai]

What if your two tables do not have any columns that are similar?

[qgis]

Thanks for this tuto, clear and smart

[ppradhan]

hv values in Attribute table but after I join it turns into NULL