sql server - Count(*) the total unique entries but for 2 different fields -

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i'm working on old table using sql server 2005. (the table isn't designed well, can't changed now.)

i'm trying count unique entries in 2 columns.

this gives list need:

select name1 mytable union select name2 mytable -- automatically removes dups

but how count that? (hopefully 1 statement.) this, syntax isn't right:

select count(select name1 mytable union select name2 mytable)

use subquery:

select count(*) (select name1 mytable union select name2 mytable) u


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