Parameters are loaded automatically from variables, no need to set them explicitly with Set Parameter

!|Insert|users|
|username|name|userid?|
|pera|Petar Detlic|>>pera|
|Mika|Mitar Miric|>>mika|
|Zeka|Dusko Dugousko|>>zeka|
|DevNull|null|>>nll|

|Query|Select * from users where userid=_:pera|
|username|name|userid|
|pera|Petar Detlic|<<pera|
