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The selection criteria in a single SELECT statement are treated in a
logical OR fashion. Thus if more then one select condition is specified
in one SELECT statement any record meeting any one of the conditions
will be included. If a record meets both the include and the exclude
condition the record is excluded. Multiple SELECT statements are
treated in a logical AND fashion. Thus if a record is selected by one
statement and not by another SELECT statement the record is rejected.
17.1.5 Field breaks
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