I'm on the 6th section of the first course, everything seemed to be going pretty well, but not my lastname column has no data values. If I run

Select * from empinfo_robwim

Then the table comes up, including the lastname column, but the column values are all just white. There weren't any gridlines at all. When I try to run something like

Select * from empinfo_robwim
where lastname LIKE '%i'

Then I get

"SQL Command Executed
No rows selected."

Any ideas on what happened? Is a glitch or could I have done this while running select commands?