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Software ==>	SQL (202 exercises)
Topic ==>	Calculations using dates (7 exercises)
Level ==>	Average difficulty
Subject ==>	SQL training

Use the DATENAME and DATEPART functions to show events taking place on Friday 13th of any month/year

This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.

Before you can do this exercise, you'll need to download and unzip this file . Once you've done this:

Go into SQL Server Management Studio;
Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
Execute this script.

This will generate the database that you'll need to use in order to do this exercise (note that the database and script are only to be used for exercises published on this website, and may not be reused or distributed in any form without the prior written permission of Wise Owl).

Create a query to show the day of the week and also the day number on which each event occurred:

In no particular order, this is what the output of your query should look like.

You can use the DATENAME function to get the day of the week, and the DAY or the DATEPART functions to get the day number.

Use this to show:

That mercifully there weren't any events on Friday the 13th;
That there was one event on Thursday 12th (the day before); and
That there were two events on Saturday the 14th (the day after).

Save this query as Friday the 13th, then close it down.

You can unzip this file to see the answers to this exercise, although please remember this is for your personal use only.

You can find other training resources for the subject of this exercise here:

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From:	Yash2211
When:	20 Sep 23 at 17:26

select EventName,EventDate, datename(weekday,eventdate) as 'Day of week',datename(day,eventdate) as 'Day number'

from tblEvent
where datename(weekday,eventdate) = 'Friday'
and
datename(day,eventdate) = '13'

From:	Chinmaykumar
When:	04 Jul 23 at 13:05

Query_Sol. for MySQL buddies

-- Creating temp. table for multiple output from same table

-- In MySQL, 'DATENAME' substitute is DAYNAME() function; also check DAY(),DAYOFMONTH(),DAYOFYEAR()

CREATE TEMPORARY TABLE TEMP_13thFriday(EventName varchar(8000),EventDate date,Day_of_week varchar(100),Day_number int);
-- now time to insert data into our temp table
INSERT INTO TEMP_13thFriday
(SELECT EventName, EventDate,
DAYNAME(EventDate) Day_of_week, DAY(EventDate) Day_number
FROM tblevent);
-- 1) there weren't any events on Friday the 13th
SELECT * FROM TEMP_13thFriday
WHERE Day_of_week = 'Friday' AND Day_number = 13;
-- 2) there was one event on Thursday the 12th
SELECT * FROM TEMP_13thFriday
WHERE Day_of_week = 'Thursday' AND Day_number = 13-1;
-- 3) there were two events on Saturday the 14th
SELECT * FROM TEMP_13thFriday
WHERE Day_of_week = 'Saturday' AND Day_number = 13+1;