SQL | Calculations using dates exercise | Use the DATENAME function and CASE to display full dates

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.

You can learn how to do this exercise if you attend one of more of the courses listed below!

Software ==> SQL  (198 exercises)
Version ==> Any version of SQL Server
Topic ==> Calculations using dates  (4 exercises)
Level ==> Harder than average
Classroom ==> Introduction to SQL  /  Fast-track SQL
Online ==> Introduction to SQL  /  Fast-track SQL
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help). Once you've done this:
  1. Go into SQL Server Management Studio;
  2. Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
  3. 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).

You need a minimum screen resolution of about 700 pixels width to see our exercises. This is because they contain diagrams and tables which would not be viewable easily on a mobile phone or small laptop. Please use a larger tablet, notebook or desktop computer, or change your screen resolution settings.

Create a query to show the full dates for any event:

Full list of dates

The first few events, in chronological order.

To get the suffix, you'll need to use a CASE statement based on the day number for any date.

Save this query as Query suffices (marvelling at the wordplay involved in the title), 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.
This page has 2 threads Add post
waltz   Reply to waltzReply
09 May 21 at 10:55

select   EventName as [Event Name]
        ,concat(datename(weekday,EventDate),' ' 
        ,case when datepart(day,EventDate) in (1,21,31) 
        then convert(varchar,datepart(day,EventDate))+'st'
        when datepart(day,EventDate) in (2,22) 
        then convert(varchar,datepart(day,EventDate))+'nd'
        when datepart(day,EventDate) in (3,23) 
        then convert(varchar,datepart(day,EventDate))+'rd'
        else convert(varchar,datepart(day,EventDate)) +'th'
        end ,' ' 
        ,datename(month, EventDate) ,' ' 
        ,year(EventDate)) as [Full Date]
from [dbo].[tblEvent]

ShukiMolk   Reply to ShukiMolkReply
10 Apr 20 at 02:12

Why do we need to use the CASE function?
What's wrong with this:

SELECT EventName, EventDate, ( (DATENAME(Weekday, EventDate)) + ' ' + (DATENAME(day, EventDate)) + 'th ' + (DATENAME(month, EventDate)) + ' ' + (DATENAME(year, EventDate)) ) AS 'Full Date'
FROM [tblEvent]
ORDER BY EventDate

waltz   Reply to waltzReply
09 May 21 at 11:04

Please check your "1st", "2nd", "3rd", "4th" etc.

DbEnthusiast   Reply to DbEnthusiastReply
18 Dec 20 at 18:47

SELECT EventName
    ,EventDate 
    ,CASE WHEN DATEPART(day,EventDate) IN (1,21,31) THEN CONCAT(DATENAME(weekday,EventDate),' ',DATEPART(day,EventDate),'st ',DATENAME(month,EventDate),' ',DATEPART(year,EventDate)) 
          WHEN DATEPART(day,EventDate) IN (2,22) THEN CONCAT(DATENAME(weekday,EventDate),' ',DATEPART(day,EventDate),'nd ',DATENAME(month,EventDate),' ',DATEPART(year,EventDate)) 
          WHEN DATEPART(day,EventDate) IN (3,23) THEN CONCAT(DATENAME(weekday,EventDate),' ',DATEPART(day,EventDate),'rd ',DATENAME(month,EventDate),' ',DATEPART(year,EventDate)) 
          ELSE  CONCAT(DATENAME(weekday,EventDate),' ',DATEPART(day,EventDate),'th ',DATENAME(month,EventDate),' ',DATEPART(year,EventDate))
    END as FullDate
FROM tblEvent

Andy B   Reply to Andy BReply
10 Apr 20 at 12:07

That answer will work for most dates, but won't for 1st, 2nd, 3rd, 21st, 22nd and 23rd.  

ShukiMolk   Reply to ShukiMolkReply
13 Apr 20 at 13:01

True that.
Tnx

Add a new post