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Is this possible? Using SQL Server 2005.......
SELECT *
FROM Data0304
UNION
SELECT *
FROM Data0506
UNION
SELECT *
FROM Data0708
797
Conclusion. Combining several tables to one large table is possible in all 3 ways. As we have seen, the behavior of UNION in SQL Server and UNION in DAX within Power BI is very similar.
The most common way of joining three tables goes something like this: SELECT * FROM Table1 INNER JOIN Table2 ON Condition INNER JOIN Table3 ON Condition; This uses an inner join, but you can specify your desired join type as with any other join. You can also combine join types if required (example below).
Example - Single Field With Same Name For example: SELECT supplier_id FROM suppliers UNION ALL SELECT supplier_id FROM orders ORDER BY supplier_id; This SQL UNION ALL example would return the supplier_id multiple times in the result set if that same value appeared in both the suppliers and orders table.
When you say
columns are same
that means,
number of columns and data types and their lengths and their order
should be same.
UNION
will include duplicate records only once in the result and
UNION ALL
will include all the duplicate records.
153
As long as the columns are the same in all three tables, but you might want to use UNION ALL to ensure duplicates are included.
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