select ta.name, a.avg,a.min,a.max, b.std, c.stdsfrom(select name from aunion select name from bunion select name from c) taleftouter join aon ta.name = a.nameleftouter join bon ta.name = b.nameleftouter join con ta.name = c.name...
select a.[name], b.avg, b.min, b.max, c.std, d.stdsfrom (select [name] from 表A union select [name] from 表B union select [name] from 表C) aleft outer join 表B b on a.[name] = b.[n...
