How To JOIN Tables?

May 6, 2008

Hi all,
Lets say that i have 3 tables, they are already related together, information on each of the 3 tables and their relationship between eachother can be found below:
I am using Microsoft SQL Server 2005 Database in Visual Web Developer 2008 using VB programming (ADO.NET)
The 3 tables are as follows:


Floor
Room
Location


Fields inside each of the tables can be found below:



Floor Table
(PK) ID
(Required) Name
DisplayOrder


Room Table
(PK) ID
(Required) Name
(PK, FK) FloorID
ExchangeID
Extension
IP
DeviceName
Remarks
(Required) Equipment
(Required) Floor2ID
FloorLocationX
FloorLocationY


Location Table
(PK,FK) FloorID
(Required) CountryName
(Required) CityName
(Required) BuildingName


The Relationships between the 3 tables are as follows:


ID field in Floor table is referenced by the field named FloorID in the Room Table

ID field in Floor table is referenced by the field named FloorID in the Location table


NOTE: Location Table serves only as an extension to Floor table thus they have a 1 to 1 relationship, due to My Projects Lead's instructions I am not allowed to consolidate the Floor Table and the Location Table as 1 whole table.

Floor Table has a 1 to Many Relationship with the Room Table.


I Have already done the physical relationships between each of the 3 tables in the Database Diagram, in Visual Web Developer 2008 Express Edition under the Database Explorer

So i have created this form to accept user input:

this form is in a aspx page called AddRooms.aspx

Country Name:______________ (data sent to location table)

City Name:_________________ (data sent to location table)

Building Name:______________ (data sent to location table)

FloorID:[This is a DropDownList which is databinded to the Floor Table]

Room Name:_______________ (data sent to room table)

*Just imagine that the above is a form to accept user input

*With a hit of a submit button all data will be sent to their respective tables in the database

Now i know that i have to JOIN tables in my database in order for my application to work, but i have no experience performing JOIN, i need great guys like you to help me apply JOIN to the 3 tables mentioned above, do let me know if you have any doubts in what i am trying to do.

Do give me that code that i can either apply in the (VB environment Visual Web Developer 2008) and/or in Microsoft SQL Server 2005 environment


Just need the SQL Statment that i will need to construct to perform the JOIN i need to.



Please Help

Many Thanks : )

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How To Join 3 Tables Using Left Or Right Join Keyword?

Aug 17, 2007

Hi guys,

I'll appreciate any help with the following problem:

I need to retrieve data from 3 tables. 2 master tables and 1 transaction table.

1. Master table TBLOC contain 2 records :
rcd 1. S01
rcd 2. S02

2. Master table TBCODE contain 5 records:

rcd 1. C1
rcd 2. C2
rcd 3. C3
rcd 4. C4
rcd 5. C5

3. Transaction table TBITEM contain 4 records which link to 2 master table:
rcd 1. S01, C1, CAR

rcd 2. S01, C4, TOY
rcd 3. S01, C5, KEY
rcd 4. S02, C2, CAR



I use Left Join & Right Join to retrieve result below (using non-ASNI method) but it doesn't work.

Right Join method:


SELECT C.LOC, B.CODE, A.ITEM FROM TBITEM A RIGHT JOIN TBCODE B ON A.CODE = B.CODE

RIGHT JOIN TBLOC C ON A.LOC = C.LOC

GROUP BY C.LOC, B.CODE, A.ITEM ORDER BY C.LOC, B.CODE



When I use Non-ASNI method it work:



SELECT C.LOC, B.CODE, A.ITEM FROM TBITEM A, TBCODE B, TBLOC C

WHERE A.CODE =* B.CODE AND A.LOC =* C.LOC

GROUP BY C.LOC, B.CODE, A.ITEM ORDER BY C.LOC, B.CODE

Result:

LOC CODE ITEM
-----------------------------
S01 C1 NULL
S01 C2 NULL
S01 C3 CAR
S01 C4 TOY
S01 C5 KEY
S02 C1 NULL
S02 C2 CAR
S02 C3 NULL
S02 C4 NULL
S02 C5 NULL


Please Help.

Thanks.






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JOIN TABLES...help!

Dec 21, 2006

hi,
this are my tables...






student




stud_num
pk2
pk3
stud_group

1234
11        
22   
1

2147
88        
66   
2

2222
22        
22   
2

5432
55        
44   
1

9876
99        
77   
1






student1






stud_num
pk2
pk3
age
grade
pass

1234
11        
22   
21
77
0

5432
55        
44   
23
90
1

9876
99        
77   
23
90
1






student2
 
 
 
 
 

stud_num
pk2
pk3
age
grade
pass

2147
88        
66   
18
78
0

2222
22        
22   
15
90
1
and this is what I want to retrieve from these 3 tables






stud_num
pk2
pk3
age

5432
55        
44   
23

9876
99        
77   
23

2222
22        
22   
15
this my query....
SELECT          student.stud_num, student.pk2, student.pk3, student1.age,                       student2.age AS Expr1FROM            student INNER JOIN                      student1 ON student.stud_num = student1.stud_num AND                       student.pk2 = student1.pk2 AND student.pk3 = student1.pk3 INNER JOIN                      student2 ON student.stud_num = student2.stud_num AND                       student.pk2 = student2.pk2 AND student.pk3 = student2.pk3WHERE           (student1.grade = '90') AND (student1.pass = '1') AND (student2.grade = '90')                       AND (student2.pass = '1')
however...it doesnt return any results...
can anyone correct my code?
 
thanx!
 
Sheila 
 

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Jun 23, 2007

I have two tables in sql server database. Tables are
Authors
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Threads
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I have this query:
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If I Want To Join Two Sql Tables ...

Aug 22, 2007

do they have to have a common primary key?

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suppose tableA has only 2 values. when i make the join with tableB it shows as 4 values

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I need to perform a join on six different tables to produce a report. The biggest join I have ever done has been four tables. The way I did that query was to join three tables and then to perform the final select on the three table join.
Can anyone give me some advice. Should I use the same approach? Or can I just continue to use the keyword INNER JOIN to perform the joins?
 

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Jun 11, 2001

I have three tables:

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I need an output in following format

Date Partnumber qty


Following query gives the desired results.

select left(orders.orderdate,11) as date, orderdetails.partnumber, SUM(orderdetails.qty) as total
from orderdetails, orders
where orderdetails.partnumber is not null
and orderdetails.order_id = orders.order_id
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group by orders.orderdate, orderdetails.partnumber
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2) at the end attach all partnumbers that have null ordered values to see which one have no orders.

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I have tables (tab#1, tab#2, tab#3, tab#4) that made of the orginal table(tab#0)

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Tables look like;

1)tab#0
key_id, code
2)tab#1
id, code#1
3)tab#2
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Hi,

I have 2 tables. One with col1,col2 and second one with
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Jul 21, 2006

Thank you, Thank you for reading my question!!! :)


I have 3 tables that need to be joined.
(Not necessarily needed info but might help: using Coldfusion with ODBC to Foxpro database)

Table 1: Timecard
--------
loginname date wrknum time
----------- --------- --------- ------
afrank 7/17/06 1 3
afrank 7/17/06 2 2
afrank 7/17/06 3 3
afrank 5/20/06 1 3
rjohn 7/17/06 1 3
.....

Table 2: Defaults
-----------
loginname wrknum
----------- ---------
afrank 1
afrank 2
afrank 3
afrank 4
afrank 5
....

Table 3: Workorders
wrknum description
---------- ---------------
1 descrip1
2 descrip2
.....


The result needs to be for the user afrank, date=7/20
and would look like:

Resultant Table:
loginname wrknum time description
----------- ---------- ------ ------------
afrank 1 3 descrip1
afrank 2 2 descrip2
afrank 3 3 descrip3
afrank 4 NULL descrip4
afrank 5 NULL descrip5


I've tried an outer left join but cannot get the right data. Basically everything from the timecard table and the leftovers from the default table with descriptions for all.

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I've got two tables, one called clientsharedeals and the clientorderdeals. In the first table, I have four fields (Rundate, Accno, Dealid, Nominal) that I need to sum(Nominal), grouping by dealid.

Once I've done this, I need to join to clientorderdeals, also having the same fields plus one extra (Rundate, Accno, Dealid, Nominal and Dealseq). Because of Dealseq, I can have more than one row in the table, matching (Rundate, Accno, Dealid, Nominal) of the first table. However, Dealseq increments, so I need to select max(Dealseq).

My query is doubling up on nominal because in my select statement, I am only using one account number, so I know what the value is for nominal and there are two rows in clientorderdeals - and it is not selecting max(dealseq) but both.

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Dec 20, 2004

Could somebody please explain to me how do we join a table onto itself as that is what I was advised to do but I can't quite get where I want to go.

What I want to do is list values from a table,but those values can be just a quote (what would cost if they decided to go for that option) or those values can represent what was spent and invoiced, what is confusing me is that all of that gets saved in the same table and in same columns, so what was quoted for example for AirFares and what was spent gets saved in the same record but when it is "quoted amount" then ID = 1 but when it is invoiced ID = -1 and that is how we know what was quoted and what was invoiced.

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Dec 28, 2004

hi,
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Parts table Orders Table Supplier Table
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Prt_name Oh_qt Sup_name
Re_Level Or_no
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Hi,

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Oct 9, 2007

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(
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T2
(
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OBJ_ID VARCHAR(34)
)

T3
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Quote:
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Here is what I have tried with.........

Quote:
SELECT * FROM T3 WHERE ITEM IN
(
SELECT COL_ID
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ON
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ON
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)



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Hi,

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go

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Jan 5, 2007

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i also tried left inner join but it always returns the same result seta.
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May 16, 2007



Hi there,



I have three tables: tblReport, lkuPrinter, and lkuProblem.



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lkuProblem is as follows:

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Jul 21, 2006

I have 3 tables that need to be joined.

Table 1: Timecard
--------
loginname date wrknum time
----------- --------- --------- ------
afrank 7/17/06 1 3
afrank 7/17/06 2 2
afrank 7/17/06 3 3
afrank 5/20/06 1 3
rjohn 7/17/06 1 3
.....

Table 2: Defaults
-----------
loginname wrknum
----------- ---------
afrank 1
afrank 2
afrank 3
afrank 4
afrank 5
....

Table 3: Workorders
wrknum description
---------- ---------------
1 descrip1
2 descrip2
.....


The result needs to be for the user afrank, date=7/20
and would look like:

Resultant Table:
loginname wrknum time description
----------- ---------- ------ ------------
afrank 1 3 descrip1
afrank 2 2 descrip2
afrank 3 3 descrip3
afrank 4 NULL descrip4
afrank 5 NULL descrip5


I've
tried an outer left join but cannot get the right data. Basically
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Dec 2, 2007

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on i.intCategoryID=c.intCategoryID
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i get a syntax error:

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FROM authors a INNER JOIN titleauthor ta
ON a.au_id = ta.au_id JOIN titles t
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