sql server - select max and min from multiple tables -


i using sql server 2012. have 2 tables contain dates. want query max , min dates both tables. know line below give me max , min dates 1 table.

 select max(dttime), min(dttime) tableone

what want min of 2 max dates table 1 , 2 & max of 2 min dates table. please see example below.

           tableone       tabletwo  max date  6-june-2000    23-june-2002  min date  10-jan-1980    15-feb-1982

result returned,

max date = 6-june-2000 min date = 15-feb-1982

you can use union, , select minimum max values , max minimum values:

select min(mx), max(mn)  (       select max(dttime) `mx`, min(dttime) `mn` tableone       union       select max(dttime) `mx`, min(dttime) `mn` tabltow      ) t1

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