Access Query and Filter Criteria

When constructing a query or a filter, you need to tell Access what to look for in each field. You do this by defining criteria - typing something (an "expression") into the Criteria cell of the query or filter grid. If you do not define any criteria for a particular field, Access assumes that you are applying no constraints and will display everything it has. This means that you only have to define criteria for those fields you are interested in.