WHERE clause doesn't work in certain column

Question

Hi All,
I try to filter mysql database using WHERE clause...everything seem working until i found there are 3 column that i can't use for WHERE clause query. When i use that columns to filter, there's no data appear in the table but the other column is working. Attached is my VI and mysql database. I really don't know what cause it happen. Any help would be very appreciated
Thank you
Attachments:
filter.vi ‏17 KB
db.txt ‏3 KB

Answer 1

Have you tried the select from whatever SQL command interpreter that MySQL provides?
It needs to be in the form SELECT * FROM issue WHERE 'condition'. If you want to get all the rows where person 1 is Harry then you would write
SELECT * FROM issue WHERE person1 = 'Harry'
The way your VI is written you will get one of two commands.
SELECT * FROM issue WHERE 'All' or SELECT * FROM issue WHERE 'WIWI'
That may return all rows if a string resolves to true. I don't use MySQL so I wouldn't know.
Disregarding LabVIEW for a moment, what is the SQL command or commands that you want your VI to send to the ADO execute VI? That might help figure out what it is you want to do.
=====================
LabVIEW 2012