Sybase SQL 两个不同表的并集

Question

Is it possible to make a union from two tables with different number of columns, values and column types in Sybase SQL?

Answer 1

Sure, as long as the columns from the top and bottom part of the union can be converted to the same type. For example:

select  intColumn as col1
,       charColumn as col2
,       decimalColumn as col3
from    Table1
union all
select  null
,       'Halelujah'
,       doubleColumn
from    Table2