In SQL Server this inserts 100 records, from the Customers table into tmpFerdeen :- SELECT top(100)* INTO tmpFerdeen FROM Customers Is it possible to do a SELECT INTO across a UNION ALL SELECT :-
Per the SQL Standard, the order of results is undefined barring an explicit order by clause. That first select in your example probably returns its results in the order returned by the subselect, but it is not guaranteed. Further, that does *not* guarantee the ordering of the result set of the entire union (same rule in the Standard).
UNION joins two results and remove duplicates, while UNION ALL does not remove duplicates. UNION also sort the final output. What I want is the UNION ALL without duplicates and without the sort. I...
I want to create a new table in SQL Server with the following query. I am unable to understand why this query doesn't work. Query1: Works SELECT * FROM TABLE1 UNION SELECT * FROM TABLE2 Query2: ...
I just read part of an optimization article and segfaulted on the following statement: When using SQL replace statements using OR with a UNION: select username from users where company = ‘bbc’ or
Given: Two queries that require filtering: select top 2 t1.ID, t1.ReceivedDate from Table t1 where t1.Type = 'TYPE_1' order by t1.ReceivedDate desc And: select top 2 t2.ID from Table t2 w...
How can I get first record of a table and last record of a table in one result-set? This Query fails SELECT TOP 1 Id,Name FROM Locations ORDER BY Id UNION ALL SELECT TOP 1 Id,Name FROM Locations ...
So which approach is better SQL UNION or MERGE? I know UNION is A+B. So if a column is NULL in Table A and it has a value in TABLE B then UNION will give me two rows right? So if I want to combine all the rows into a single row based on the id should I use MERGE? I have an option to do this in SQL or SSIS.
I have a union of three tables (t1, t2, t3). Each rerun exactly the same number of records, first column is id, second amount: 1 10 2 20 3 20 1 30 2 30 3 10 1 20 2 40 3 50 Is there a si...
