将数据从在 SQL 中具有相同表的两个不同数据库复制到临时表

Question

I have two databases. One database has current year data and the other has previous year data.

I want to copy data into a temporary table from a table named tbl_Records which is available in both databases and data from a temporary table. I have used inner join for the same.

select a.* 
into #copy 
from #temp t 
inner join Records2021..tbl_Records r on t.uniqueno = r.uniqueno
where isdeleted = 0

The table tbl_Records has around 150 columns and all columns are required. Hence preferred *

Now I need to include the database Records2020 for the previous year. How can I do so?

Using a CTE may help. But the issue is I need to specify all column names for the same which is tedious. Is there an easier way to do this as I need to implement this in almost 50-60 different stored procedures for different tables.

My ultimate goal is just to get data from both databases together into one temporary table.

Code attempt:

If object_id('tempdb..#copy') is not null
begin
    drop table #copy
end

If object_id('tempdb..#temp') is not null
begin
    drop table #temp
end;

with cte as
(
    select a.* 
    from #temp t 
    inner join Records2021..tbl_Records r on t.uniqueno = r.uniqueno
    where isdeleted = 0

    union all

    select a.* 
    from #temp t 
    inner join Records2020..tbl_Records r on t.uniqueno = r.uniqueno
    where isdeleted = 0
) 
select a.* 
into #copy 
from cte   /*this does not work as I need to mention all 150 columns here.*/

I'm open to any other alternatives too.

DBMS: Microsoft SQL Server

Answer 1

You can solve it using UNION ALL but pay attention that #temp and tbl_Records table must have the same structure (columns and data type).

SELECT 
    *
INTO 
    #copy
FROM (
    SELECT * 
    FROM #temp

    UNION ALL

    SELECT * 
    FROM [Records2021]..[tbl_Records]
) AS tbl
WHERE 
    tbl.isdeleted = 0

If table structure is different, use SELECT... INTO for one table, and for the second table adjust INSERT INTO with needed columns.