Page Comparison

Select
	p.PIN,
	p.[NAME] as 'Name',
	p.CLIENT NUMORGID,
	p.EMPLOYMENTSTARTDATE,
	p.EMPLOYMENTENDDATE,
	Isnull(a1.DATETO,a1.TODATEESTIMATED) as 'Gap_ From',
	a2.DATEFROM as 'Gap_ To',
	DateDiff(DAY,Isnull(a1.DATETO,a1.TODATEESTIMATED),a2.DATEFROM)-1 as 'Gap_ Days'
From PW001P01 p
Join PW001P03 a2 on p.PIN = a2.PIN
			and a2.DATEFROM > (Select MIN(t.DATEFROM) From PW001P03 t Where t.PIN = p.PIN)
Join Pw001p03 a1 on p.PIN = a1.PIN
			and a1.SEQUENCENO != a2.SEQUENCENO
			and Isnull(a1.DATETO,a1.TODATEESTIMATED) is not null
			and DateDiff(DAY,Isnull(a1.DATETO,a1.TODATEESTIMATED),a2.DATEFROM)>1