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1. problem with select statement in many to one relational in EJB3 and JSF    stackoverflow.com

Hi All i wonder how to select between many to one relational i have two table Sub_category and Items sub category is own of relational, it contain list of Items Two class follow: 

@Entity
@Table(name ...

2. Removing a row dynamically after selection    stackoverflow.com

I am having trouble trying to remove a row in the data table dynamically. Based on this article: JSF 2.0 Dynamically Remove Components Is there a way to refresh the data ...