从两个不同的SQL表返回结果作为搜索结果

Question

I have two different tables containing similar data but slightly different format.

Is it possible to return search results from both tables? I also need to paginate these results.

Answer 1

You can use UNION to query both tables and return results in just one query:

SELECT field1,field2  FROM table1
UNION
SELECT field1,field2 FROM table2

If table1 and table2 are very different you can combine the UNION with a more complex FROM using another select something like ...

SELECT field1,field2  FROM (SELECT id1 as field1,id2 as field2 FROM table1a,table1b WHERE id1 = id2)
UNION
SELECT field1,field2 FROM table2

To paginate results you can enclose a union in another select and use limit and offset ....

SELECT field1,field2 FROM (
    SELECT field1,field2  FROM table1
    UNION
    SELECT field1,field2 FROM table2
) LIMIT 100 OFFSET 0

If you give us a small description of the tables structure we might be able to help better.