Blog Posts

Blog Post

Should You Use Index Hints?

Watch this week's video on YouTube
One of the things that the SQL Server query optimizer does is determine how to retrieve the data requested by your query.
Usually it does...

2018-07-31

13 reads

Blog Post

Should You Use Index Hints?

Watch this week's video on YouTube
One of the things that the SQL Server query optimizer does is determine how to retrieve the data requested by your query.
Usually it does...

2018-07-31

14 reads

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Question of the Day

ORDER BY alias

There is a table tmp_tab: 

CREATE TABLE tmp_tab (
id int,
val int
);
INSERT INTO tmp_tab VALUES
(1, 1),
(2, NULL),
(3, 3),
(4, 4),
(5, 5);
You want to order the rows ids by the following expression: 
    ISNULL(val, id) + 1
Which of the following queries produces the expected ordering and why? (Select all correct)

See possible answers