So I'm new to this site because I just recently started a data basing class, so I'm still learning the basics, but I need a little bit of help. So these are the two problems I have.
List of all apartments that were occupied on March 1, 2015 sorted by complex and apartment number. Example Results:
complexName apartmentNumber
Fox Run 101
Fox Run 102
Fox Run 204
Oak Meadows 103
Villa Maria 11
Villa Maria 12
List of all tenants that had a current lease on March 1, 2015 sorted by property and apartment number
Example results:
complexName apartmentNumber givenName familyName
Fox Run 101 Shannon McCoy
Fox Run 102 Larry Thomas
Fox Run 204 Mark Patterson
Oak Meadows 103 Jose Ortiz
Villa Maria 11 Cassie Lee
Villa Maria 12 Robert Woodward
My SQL for the first problem is...
SELECT DISTINCT name AS 'complexName', number AS 'apartmentNumber'
FROM week9wildwood.Complex AS c
INNER JOIN week9wildwood.Apartment AS a ON c.complexID = a.Complex_complexID
INNER JOIN week9wildwood.Lease AS l ON a.number = l.Apartment_number
WHERE startDate BETWEEN '2015-03-01' AND '2016-03-01'
ORDER BY name, number;
But I keep getting this back...
complexName apartmentNumber
Fox Run 102
Fox Run 103
Fox Run 104
Oak Meadows 102
Oak Meadows 103
Villa Maria 11
Villa Maria 21
I'm not sure what I'm doing wrong, and why it's coming back with different data. I also feel like the querie for the first problem, is almost the same for the second problem, but the wording of it has me hesitant. Any suggestions would be greatly appreciated!
Untested but maybe just make sure the end date is greater than March 15, 2015
select name AS 'complexName', number AS 'apartmentNumber'
from week9wildwood.Complex AS c
inner join
week9wildwood.Apartment AS a
on c.complexID = a.Complex_complexID
inner join
week9wildwood.Lease AS l
on a.number = l.Apartment_number
where end_date > 2015-03-15
ORDER BY name, number;
Have you tried Group By?
SELECT DISTINCT name AS 'complexName', number AS 'apartmentNumber'
FROM week9wildwood.Complex c
INNER JOIN week9wildwood.Apartment a
ON c.complexID = a.Complex_complexID
INNER JOIN week9wildwood.Lease l
ON a.number = l.Apartment_number
WHERE startDate BETWEEN '2015-03-01' AND '2016-03-01'
GROUP BY 1
ORDER BY name, number;
Related
This question already exists:
Use left join and inner join with more than 2 tables
Closed 4 months ago.
Here you can see I have three tables
Student table
Stud_id Name Br_id Email City_id
1001 Ankit 101 ankit#bmail.com 1
1002 Pranav 105 pranav#bmail.com 2
1003 Raj 102 raj#bmail.com 2
1004 Shyam 112 shyam#bmail.com 4
1005 Duke 112 duke#bmail.com 2
1006 Jhon 102 jhon#bmail.com 3
1007 Aman 101 aman#bmail.com 4
1008 Pavan 111 pavan#bmail.com 13
1009 Virat 112 virat#bmail.com 12
Branch Table
Br_id Br_name HOD Contact
101 CSE SH Rao 22345
102 MECH AP Sharma 28210
103 EXTC VK Reddy 34152
104 CHEM SK Mehta 45612
105 IT VL Shelke 22521
106 AI KH Verma 12332
107 PROD PG Kakde 90876
Address Table
City_id City Pincode
1 Mumbai 400121
2 Pune 450011
3 Lucknow 553001
4 Delhi 443221
5 Kolkata 213445
6 Chennai 345432
7 Nagpur 323451
8 Sri Nagar 321321
I am using here three tables first one is a student table and the second one is a Branch table and the third one is an Address table
So I am writing a query like this here you can see below
select [Name], Br_name, City
from student
inner join Branch on student.Br_id = Branch.Br_id
left join [Address] on student.City_id = [Address].City_id
I have three tables I want to show here the student's name and branch name city name, but I want to show the student who has their branch only. I also want to show the student who has their city as well as show a student who does not have any city.
I wrote the query above but here I am not getting the result. Here student's name who does not have any city what's wrong here in my above join SQL query?
Here as you can see I am getting this result which I do not want to show
Name Br_name City
Ankit CSE Mumbai
Pranav IT Pune
Raj MECH Pune
Jhon MECH Lucknow
Aman CSE Delhi
Why can I not get the students who do not have a city and who have a city? What's wrong here in my join query what I am missing here?
Please let me know what's wrong in my above join query what should I do to get proper result? I have given three tables above
You can see that and why I am not able to get the result what I want to show what is the wrong in the above my join query please let me know
I hope someone will help me. Thank you so much.
GOALS (~1700 rows)
YEAR COUNTRY NAME NUM_GOALS
-------------------------------------------
2018 England Harry Kane 6
2018 France Antoine Griezmann 4
2014 Argentina Lionel Messi 4
2014 Brazil Fred 1
2010 Germany Thomas Muller 5
2010 Japan Shinji Okazaki 1
1992 England Gary Linekar 6
CHAMPIONS (~500 rows)
YEAR COUNTRY NAME ROLE
-------------------------------------------------
2018 France Didier Deschamps Manager
2018 France Hugo Lloris Goalkeeper
2018 France Paul Pogba Midfielder
2014 Germany Joachim Loew Manager
2014 Germany Mesut Ozil Midfielder
2014 Germany Miroslav Klose Forward
2002 Brazil Da Silva Midfielder
1994 Brazil Da Silva Midfielder
1998 France Didier Deschamps Midfielder
Write a query showing all world cup winning players who have never scored a goal.
What I am unsure about is whether to use a join for this and whether there is a need to specify and ID's if a join is to be used.
I'd be grateful for extra clarification and help with this, or if my query needs any tweaking.
What I have tried:
This is what I came up with:
SELECT GOALS.NAME
FROM GOALS
INNER JOIN CHAMPIONS ON CHAMPIONS.COUNTRY = GOALS.NAME
WHERE GOALS.NUM_GOALS = 0;
Problems with your query:
the join condition does not look right
even if it was, it searches for players that had at least one world cup without scoring a goal - which is different from those that never scored a goal
You could use not exists:
select c.*
from champions c
where not exists (
select 1
from goals g
where g.country = c.country and g.name = c.name and g.num_goals > 0
)
This assumes that (country, name) tuples do identify a player.
On the other hand, if you want players that won a world cup without scoring a goal in that particular event, then you can either add a correlation condition on year, or use a straight join:
select c.*
from champions c
inner join goals g
on g.country = c.country
and g.name = c.name
and g.year = c.year
where g.num_goals = 0
Your ON condition is comparing CHAMPIONS.COUNTRY = GOALS.NAME, which is not a good comparison for joining these two tables. I would suggest doing this:
SELECT
GOALS.NAME
FROM
GOALS
INNER JOIN
CHAMPIONS
ON
CHAMPIONS.COUNTRY = GOALS.COUNTRY
WHERE
GOALS.NUM_GOALS = 0;
how do i join following tables with wildcards? I would like to get all distinct rows from People table which contains SearchedName from SearchedPeople table.
SearchedPeople:
SearchedName
--------
Andrew
John
John Smith
People:
ID PersonName Attribute Age
----------------------------------------
1 John Smith 1 23
2 John Smith Jr 3 25
3 John Smith Jr II 4 73
4 Kevin 2 21
5 Andrew Smith 1 14
6 Marco 5 90
Desired Output:
PersonName Attribute Age
----------------------------------------
John Smith 1 23
John Smith Jr 3 25
John Smith Jr II 4 73
Andrew Smith 1 14
Code i got so far which doesnt wor. It returns three empty rows(why is that?).
SELECT b.PersonName, b.Attribute, b.Age
FROM SearchedPeople a
LEFT JOIN People b ON "%"&a.SearchedName&"%" like b.PersonName
It returns three empty rows because you don't have any columns from table a (SearchedPeople) and the LEFT JOIN didn't produce a match.
The reason is your criteria is in the wrong order you are searching for PersonName in the string %Searchedname% you need to switch that around. Also Access doesn't like the % as much as it likes the asteriks * for wilcard unless you make some changes to the query or configuration of MS-Access see below comment from Parafait.
I just tested this:
SELECT a.SearchedName
,b.PersonName, b.Attribute, b.Age
FROM
SearchedPeople a
LEFT JOIN People b
ON b.PersonName LIKE ("*" & a.SearchedName & "*")
Edit:
Good Ms Access specific information from a comment from #Parafait pasting in answer in case comment every got deleted.:
Use ALIKE and percents work. And if OP connects to MS Access via OLEDB and not the GUI .exe program, the % operator is required for LIKE statements in coded SQL. OP can also change database settings to ANSI-92 mode to always use % wildcards.
looking for query help on this. what would be the query for the below results.
List of all apartments that were occupied on March 1, 2015 sorted by complex and apartment number.
ComplexName ApartmentNumber
-----------------------------
Fox Run 101
Fox Run 102
Fox Run 204
Oak Meadows 103
Villa Maria 11
Villa Maria 12
List of all tenants that had a current lease on March 1, 2015 sorted by property and apartment number
Example results:
ComplexName ApartmentNumber GivenName FamilyName
----------------------------------------------------------
Fox Run 101 Shannon McCoy
Fox Run 102 Larry Thomas
Fox Run 204 Mark Patterson
Oak Meadows 103 Jose Ortiz
Villa Maria 11 Cassie Lee
Villa Maria 12 Robert Woodward
Sum of all rent paid in 2015 grouped by property and month
Example results:
ComplexName Month Rent Revenue
--------------------------------------
Fox Run March 1250.00
Oak Meadows March 1500.00
Oak Meadows April 700.00
Villa Maria March 1200.00
Villa Maria April 600.00
What are you table names and column names, it is difficult to give advice without these: For example if your table was called apartments and had a column occupieddate and appartment number
SELECT *
FROM Apartments
WHERE
occupieddate ='03/01/2015'
ORDER BY
Appartment number;
Could be an answer to your first question
The project I'm asking about is for sending an email to teachers asking what books they're using for the classes they're teaching next semester, so that the books can be ordered. I have a query that compares the course number of this upcoming semester's classes to the course numbers of historical textbook orders, pulling out only those classes that are being taught this semester. That's where I get lost.
I have a table that contains the following:
Professor
Course Number
Year
Book Title
The data looks like this:
professor year course number title
--------- ---- ------------- -------------------
smith 13 1111 Pride and Prejudice
smith 13 1111 The Fountainhead
smith 13 1222 The Alchemist
smith 12 1111 Pride and Prejudice
smith 11 1222 Infinite Jest
smith 10 1333 The Bible
smith 13 1333 The Bible
smith 12 1222 The Alchemist
smith 10 1111 Moby Dick
johnson 12 1222 The Tipping Point
johnson 11 1333 Anna Kerenina
johnson 10 1333 Everything is Illuminated
johnson 12 1222 The Savage Detectives
johnson 11 1333 In Search of Lost Time
johnson 10 1333 Great Expectations
johnson 9 1222 Proust on the Shore
Here's what I need the code to do "on paper":
Group the records by professor. Determine every unique course number in that group, and group records by course number. For each unique course number, determine the highest year associated. Then spit out every record with that professor+course number+year combination.
With the sample data, the results would be:
professor year course number title
--------- ---- ------------- -------------------
smith 13 1111 Pride and Prejudice
smith 13 1111 The Fountainhead
smith 13 1222 The Alchemist
smith 13 1333 The Bible
johnson 12 1222 The Tipping Point
johnson 11 1333 Anna Kerenina
johnson 12 1222 The Savage Detectives
johnson 11 1333 In Search of Lost Time
I'm thinking I should make a record set for each teacher, and within that, another record set for each course number. Within the course number record set, I need the system to determine what the highest year number is - maybe store that in a variable? Then pull out every associated record so that if the teacher ordered 3 books the last time they taught that class (whether it was in 2013 or 2012 and so on) all three books display. I'm not sure I'm thinking of record sets in the right way, though.
My SQL so far is basic and clearly doesn't work:
SELECT [All].Professor, [All].Course, Max([All].Year)
FROM [All]
GROUP BY [All].Professor, [All].Course;
Use your query as a subquery and INNER JOIN it back to the [ALL] table to filter the rows.
SELECT
a.Professor,
a.Year,
a.Course,
a.title
FROM
[ALL] AS a
INNER JOIN
(
SELECT [All].Professor, [All].Course, Max([All].Year) AS MaxOfYear
FROM [All]
GROUP BY [All].Professor, [All].Course
) AS sub
ON
a.Professor = sub.Professor
AND a.Course = sub.Course
AND a.Year = sub.MaxOfYear;