DISTINCT works to select a distinct combination of all the columns you selected. In this case, the combination "item1,data1" and "item1,data2" are two completely different combinations of the two …

Sep 10, 2008 · The problem with your query is that when using a GROUP BY clause (which you essentially do by using distinct) you can only use columns that you group by or aggregate functions.

May 25, 2011 · SELECT DISTINCT FIELD1, FIELD2, FIELD3 FROM TABLE1 works if the values of all three columns are unique in the table. If, for example, you have multiple identical values for first …

Aug 11, 2017 · DISTINCT A instrução SELECT DISTINCT é usada para retornar apenas valores distintos (diferentes). Dentro de uma tabela, uma coluna geralmente contém muitos valores …

SELECT DISTINCT TOP 2 name FROM [ATTENDANCE] ; In the above query, name is the column_name and [ATTENDANCE] is the table_name. You can also use WHERE with this to make …

281 The problem is that the columns used in the ORDER BY aren't specified in the DISTINCT. To do this, you need to use an aggregate function to sort on, and use a GROUP BY to make the DISTINCT …

1 FOO-23 Orange 3 FOO-24 Apple This query isn't getting me there. How can I SELECT DISTINCT on just one column?

SELECT COUNT(DISTINCT column_name) AS some_alias FROM table_name This will count only the distinct values for that column.

Feb 19, 2017 · SELECT DISTINCT TOP 1 ID, Email, ProductName, ProductModel FROM Products ORDER BY ID DESC The TOP 1 will return only the first record, by ordering it by the ID descending …

Dec 3, 2008 · Use SELECT DISTINCT because this is standard SQL, and SELECT UNIQUE is non-standard, and in database brands other than Oracle, SELECT UNIQUE may not be recognized at all.