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Software ==>	SQL (203 exercises)
Topic ==>	Setting criteria using WHERE (12 exercises)
Level ==>	Harder than average
Subject ==>	SQL training

3 challenging queries combining criteria to find possible data anomalies

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).

Write as many of the following queries as your mean trainer gives you time for:

Query to show	Returns
Events which aren't in the Transport category (number 14), but which nevertheless include the text Train in the EventDetails column.	4 rows
Events which are in the Space country (number 13), but which don't mention Space in either the event name or the event details columns.	6 rows
Events which are in categories 5 or 6 (War/conflict and Death/disaster), but which don't mention either War or Death in the EventDetails column.	91 rows

Save this query listing possible anomalies as Primeval, 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:	Ola_Samson
When:	21 Mar 24 at 22:08

-- PART 1--

SELECT *

FROM event e

JOIN

category c ON e.categoryid = c.categoryid

WHERE e.categoryid NOT IN (14) AND Eventdetails LIKE '%Train%';

-- PART 2--

SELECT *

FROM event e

JOIN

country c ON e.countryid = c.countryid

WHERE e.countryid = 13

AND eventname NOT LIKE '%Space%'

AND eventdetails NOT LIKE '%Space%';

-- PART 3--

SELECT * , ROW_NUMBER() OVER w AS row_num

FROM event e

JOIN

category c ON e.categoryid = c.categoryid

WHERE e.categoryid IN (5, 6)

AND eventdetails NOT LIKE '%war%'

AND eventdetails NOT LIKE '%death%'

WINDOW w AS ()

ORDER BY eventid;

From:	Devender
When:	12 Jan 24 at 12:07

/*1 Events which aren't in the Transport category (number 14),

but which nevertheless include the text Train in the EventDetails column. 4 rows

select * from tblEvent

where CategoryID != 14 and EventDetails like '%train%'

/*2 Events which are in the Space country (number 13),

but which don't mention Space in either the event name or the event details columns. 6 rows*/

select * from tblEvent

where CategoryID =13 and EventDetails not like '%space%' and eventname not like '%space%'

/*3 Events which are in categories 5 or 6 (War/conflict and Death/disaster),

but which don't mention either War or Death in the EventDetails column. 91 rows

Save this query listing possible anomalies as Primeval, then close it down.*/

select * from tblEvent

where CategoryID in (5,6) and EventDetails not like '%war%' and EventDetails not like '%death%'

From:	Yash2211
When:	26 Aug 23 at 10:52

select * from tblEvent
where categoryid in (5,6) and EventDetails not like '%War%' and EventDetails not like '%Death%'

From:	e-emam14
When:	16 Aug 23 at 16:52

SELECT eventname
FROM tblevent
WHERE categoryid <> 14 AND eventdetails LIke '%train%';
SELECT eventname
FROM tblevent
WHERE countryid =13 AND eventdetails NOT LIKE '%space%' AND eventname NOT LIKE '%space%'
SELECT eventname
FROM tblevent
WHERE categoryid =5 OR categoryid =6 AND eventdetails NOT LIKE '%war%' OR eventdetails NOT LIKE '%death%'

From:	poldo123
When:	07 Oct 22 at 14:57

SELECT CategoryID, EventDetails
FROM tblEvent
WHERE CategoryID <> 14
AND EventDetails LIKE '%Train%'

SELECT CountryID, EventName, EventDetails
FROM tblEvent
WHERE CountryID = 13
AND (EventName NOT LIKE '%Space%'
AND EventDetails NOT LIKE '%Space%')

SELECT CategoryID, EventDetails
FROM tblEvent
WHERE (CategoryID = 5 OR CategoryID = 6)
AND EventDetails NOT LIKE '%War%'
AND EventDetails NOT LIKE '%Death%'

From:	ahmed yousif
When:	23 Oct 20 at 11:02

-- query 1
select EventName
from dbo.tblEvent
where CategoryID <> 14
and EventDetails like '%train%'
------------------------------
go
--query 2
select EventName
from dbo.tblEvent
where CountryID = 13
and
EventName not like'%space%'
and
EventDetails not like '%space%'
----------------------------
--query 3
go
select EventName
from dbo.tblEvent
where CategoryID in(5,6)
and EventDetails not like '%war%'
and EventDetails not like '%death%'

From:	skibochi
When:	04 Feb 20 at 05:40

Returning 4 Rows

SELECT *
FROM [dbo].[tblEvent]
WHERE EventDetails LIKE '%Train%'
AND CategoryID NOT LIKE '14';

From:	skibochi
When:	04 Feb 20 at 05:20

6 Rows Return

SELECT *
FROM [dbo].[tblEvent]
WHERE CountryID = 13
AND EventDetails NOT LIKE '%Space%'
AND EventName NOT LIKE '%Space%';

From:	suntcalm
When:	16 Aug 19 at 14:08

(4 rows affected)

(6 rows affected)

(99 rows affected)

SELECT * FROM tblEvent
      WHERE CategoryID IN (5,6)
      AND
      EventDetails NOT LIKE '%War%'
      AND
      EventDetails not like '%dEATH&';

Why 99 and not 91? It was the database changed?

From:	Andy B
When:	19 Aug 19 at 08:12

Have a look at your DEATHly punctuation!

From:	najilevi
When:	26 Jul 18 at 09:08

Hi,

I tried to solve exercise B with the WAR and the DEATH but haven't succeeded207 yet. Can someone can help me and write the correct answer?

This is what I wrote:

select *
from tblEvent
where CategoryID = 5 or CategoryID = 6 and (EventDetails not like ('%war%death%')

Thanks

Nadav

From:	chaluvadi
When:	06 Sep 18 at 22:47

Does your query deals with, "if the word death comes first and then war".

From:	Phithel
When:	17 Oct 18 at 18:18

Here is my solution:

SELECT
   *
FROM
   [dbo].[tblEvent]
WHERE
   [CategoryID] IN (5, 6) AND
   [EventDetails] NOT LIKE '%Death%' AND
   [EventDetails] NOT LIKE '%WAR%'

91 records

From:	jorisber
When:	27 Mar 18 at 12:51

Where can i find the solutions of these exercises?

Select solutions
from wiseowlswebsite
where exercise = 'sql'

From:	Andy B
When:	27 Mar 18 at 15:00

Currently the only way is to attend one of our courses, but we are intending to publish answers too in the next month or two.

From:	eric
When:	05 Nov 17 at 07:51

1st query should not return 4 rows but 1

select * from tblEvent
where EventDetails like '% train %' and CategoryID != 14

i guess your query is:

EventDetails like '%train%'

which is incorrect as it will return words such as training...etc

From:	Zerish
When:	09 May 18 at 19:53

Try this

SELECT *
FROM [dbo].[tblEvent][dbo]
WHERE CategoryID!=14 AND EventDetails like '%train%'

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EXERCISE TOPIC

SQL EXERCISES

SQL EXERCISES

3 challenging queries combining criteria to find possible data anomalies

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