You can use between it specifies a range of be tested.
Syntax:
test_expression [ NOT ] BETWEEN begin_expression AND end_expression
Arguments?
test_expression
It is the expression to be tested in the range defined by
begin_expressione end_expression. test_expression must have the same
data type that begin_expression and end_expression.
NOT
Specifies that the predicate result should be denied.
begin_expression
Is any valid expression. begin_expression must have the same type of
data that test_expression and end_expression.
end_expression
Is any valid expression. end_expression must have the same type of
data to test_express begin_expression.
AND
Acts as a placeholder that indicates that test_expression should
be within the range indicated by begin_expression and
end_expression.
In short.
Select * from sua tabela
where suadata BETWEEN DT_INICIO and DT_FIM