your blocks look very cumbersome... also there is a lot of redundancy...
first you get all columns, then you divide that into 3 different columns, and finally you use several replace all blocks to display the result in separate labels...
what about displaying the result in a table? you can find several solutions after doing a search in the community, see also [REBORN !] TableView Extension Versions 3&4 (pre nb191) and 5 by @Ken
why do you need all these replace all blocks? can't the data be provided in a better format?
my MySQL example App Inventor Tutorials and Examples: MySQL | Pura Vida Apps provides the data in a csv table directly
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by 
Taifun.