Sep 8, 2008 · The UNION ALL command is equal to the UNION command, except that UNION ALL selects all values. The difference between Union and Union all is that Union all will not …

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 …

Oct 11, 2010 · Thanks, All of your answer say that there are only two main point 1.) Duplicate rows and 2). Performance. It mean that we can use any one of them, so i cant understand why …

Dec 6, 2016 · UNION ALL La instrucción UNION ALL es similar a UNION con la excepción que se seleccionan todos los valores. Por lo tanto la difirencia principal entre UNION y UNION ALL es …

Jul 23, 2014 · SELECT id FROM table1 UNION ALL SELECT id FROM table2 I get a new table with all the ids, and it's perfect. But when I try a :

Sep 18, 2016 · Qual é a diferença entre UNION e UNION ALL? Se possível, incluir exemplos de uso.

Sep 25, 2018 · I have to get the results by using multiple SQL statements with union all, this is like: select column1,column2 from table1 where column4 ='value1' union all select …

Feb 25, 2016 · A UNION statement effectively does a SELECT DISTINCT on the results set. If you select Distinct from Union All result set, Then the output will be equal to the Union result set.

Mar 20, 2017 · SELECT * FROM (SELECT colA, colB FROM tableA UNION SELECT colA, colB FROM tableB) as tableC WHERE tableC.colA > 1 If we're using a union that contains the …

SELECT A FROM ( SELECT A, B FROM TableA UNION SELECT A, B FROM TableB ) WHERE B > 'some value' Am I missing anything or making an assumption about how this works? I'm …