Querying Multi-tables? Joins? Subqueries?
Jul 20, 2005
Hi, all:
This is probably a simple problem, but, as an SQL newbie, I'm having a
little trouble understanding multi-joins and subqueries.
I have the following tables and columns:
MemberTable
-----
MemberID (primary key)
MemberName
Address
Country
FoodsTable
------
FoodID (primary key)
FoodName
MusicTable
-----
MusicID (primary key)
MusicName
MoviesTable
-----
MoviesID (primary key)
MoviesName
....and their linking tables...
Members2FoodsTable
-----
MemberID (foreign key)
FoodsID (foreign key)
Members2MoviesTable
-----
MemberID (foreign key)
MoviesID (foreign key)
....and so forth.
Now what I'm trying to do is retrieve a specific MemberID, his address info
(from the Members table), and get a listing of his favorite Movies, Foods,
Music, etc. I know I probably need to JOIN tables, but where do I JOIN the
tables? Do I have to JOIN the various Music/Foods/Movies tables or is it
the Music/Members2Music and Foods/Members2Foods, etc. tables? And I assume
I would probably need to perform a subquery somewhere?
I realize I'll need to first filter the Members, Members2Music,
Members2Foods, etc. tables by the MemberID, and afterwards, retrieve a
listing of the actual Music/Foods/Movies names. I'm just confused how to do
that. (By the way, I have a total of 10 other tables or in addition to
Music, Foods, etc. so it's a lot of table JOINing.)
If someone could please help me out with the actual SQL coding, I'd really
appreciate it!
Thanks for the help!
J
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Mar 25, 2008
Hi all,
right now am using sub queries for the below query.. but is this a good way or do i need to use joins.. however if you see the "downloads" column i need to get a count of how many download does each user did on the files/url.
SELECT
UU_Title as Title,
FileName_Url = (Case When UU_Type = 'U' Then UU_url else UU_Filename End),
UU_UserID as UserID,
B.User_FirstName + ' ' + B.User_LastName AS Author,
UU_TimeStamp as DateCreated,
UU_LastModified as DateModified,
Downloads = (select count(*) from Vportaldevstats.[dbo].stats_download A where A.stat_AuID = UU_AssocAuID ),
Presentation_Associations = (Select Presentation_Association = (Case When au_subject is Null or au_subject != '' then au_title else au_title end) from VPortalDev.[dbo].au A where a.Au_id = UU_AssocAuID),
Community_Associations = (Select community_Association = (Case When au_subject is Null or au_subject != '' then au_title else au_title end) from VPortalDev.[dbo].au A where a.Au_id = UU_AssocCommunityID)
From Vportaldev.[dbo].user_upload A , Vportaldev.[dbo].[User] B
Where A.UU_UserID = B.User_ID
Order by UU_LastModified Desc
and i tried re-modifying the above query as joins.. just wanna know is this the best way to do it. (and i don't know how to handle count(*) downloads .. pls.help.
SELECT
UU_Title as Title,
FileName_Url = (Case When UU_Type = 'U' Then UU_url else UU_Filename End),
UU_UserID as UserID,
B.User_FirstName + ' ' + B.User_LastName AS Author,
UU_TimeStamp as DateCreated,
UU_LastModified as DateModified,
COUNT(*)
from
Vportaldev.[dbo].user_upload uu
Innerjoin Vportaldev.[dbo].[user] u
ON UU.UU_USERID = U.USER_ID
INNERJOIN Vportaldevstats.[dbo].stats_download SD
ON UU.UU_ASSOCAUID = SD.STAT_AUID
INNERJOIN VPortalDev.[dbo].au AU
ON AU.Au_id = UU.UU_ASSOCAUID
any help is much appreciated.
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Jul 20, 2005
Hi,Trying to get a grip on the "join" thing :)Up until now, I allways used this kinda method:"(select t1.a from t1 where t1.b in (select t2.ab from t2 where t2.b=0))"How can this be accomplished using joins? And if you have the time pleaseexplain the "bits" :)Thank you.--?TH
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May 8, 2008
Hopefully someone can suggest a better solution than what I'm currently hobbling along with.Basically, I've got a table that has rows inserted (with a timestamp) whenever there is a change to one of the values of a particular "item". So, what I want is to return a dataset of the latest value for each category, for each particular item. I'm guessing that what I'm trying to acheive is doable in some elegant and performant fashion. Something maybe involving a ROLLUP or WITH CUBE or something amazingly obvious. But for the time being, I've got a less-elegant query that returns the correct data. It just uses subqueries.Here's the T-SQL to run my scenario: DECLARE @actionHistoryTable TABLE ( itemID int, actionType int, actionValue nvarchar(50) NULL, actionTime datetime )INSERT @actionHistoryTable VALUES( 1000, 1, 'fork', '1/1/2008')INSERT @actionHistoryTable VALUES( 1000, 2, '27', '1/2/2008')INSERT @actionHistoryTable VALUES( 1000, 3, '200', '1/12/2008')INSERT @actionHistoryTable VALUES( 1000, 2, '1', '1/1/2008')INSERT @actionHistoryTable VALUES( 1000, 3, '204', '1/1/2008')INSERT @actionHistoryTable VALUES( 1000, 1, 'ball', '1/3/2008')INSERT @actionHistoryTable VALUES( 1026, 2, '20', '1/10/2008')INSERT @actionHistoryTable VALUES( 1026, 2, NULL, '1/5/2008')INSERT @actionHistoryTable VALUES( 1026, 1, 'hotdog', '1/6/2008')INSERT @actionHistoryTable VALUES( 1026, 3, '2511', '1/8/2008')INSERT @actionHistoryTable VALUES( 1026, 3, '375', '1/7/2008')INSERT @actionHistoryTable VALUES( 1026, 1, 'mustard', '1/5/2008')INSERT @actionHistoryTable VALUES( 1013, 1, 'rock', '1/2/2008')INSERT @actionHistoryTable VALUES( 1013, 1, 'paper', '1/21/2008')INSERT @actionHistoryTable VALUES( 1013, 3, '10', '1/20/2008') -- JUST DISPLAY THE RAW TABLE FOR THIS EXAMPLESELECT * FROM @actionHistoryTable -- THIS RETURNS THE RESULTS I'M WANTING, IT ROLLS-UP THE LATEST VALUE FOR EACH ACTION_TYPE FOR EACH ITEMIDSELECT aht.itemID ,( SELECT TOP 1 aht2.actionValue FROM @actionHistoryTable aht2 WHERE aht.itemID = aht2.itemID AND aht2.actionType = '1' ORDER BY aht2.actionTime DESC ) as 'latest type 1 value' ,( SELECT TOP 1 aht2.actionValue FROM @actionHistoryTable aht2 WHERE aht.itemID = aht2.itemID AND aht2.actionType = '2' ORDER BY aht2.actionTime DESC ) as 'latest type 2 value' ,( SELECT TOP 1 aht2.actionValue FROM @actionHistoryTable aht2 WHERE aht.itemID = aht2.itemID AND aht2.actionType = '3' ORDER BY aht2.actionTime DESC ) as 'latest type 3 value'FROM @actionHistoryTable ahtGROUP BY aht.itemID Is there a better way?-Steve
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Jul 23, 2005
I have four total tables.Table One (Documents)- List of Documents. Each record has two fieldsrelated to this issue. First field (Document_ID) is the ID of thedocument, second field is the ID of the record (Task_ID) it isassociated to in Table Two.Table Two (Activities)- List of activities. Each record has two fieldsrelated to this issue. First field (Activity_ID) is the ID of theactivity, the second field (Group_ID) is the ID of the record it isassociated to in Table Three.Table Three (Groups) - List of groups. Each record has two fieldsrelated to this issue. First field (Group_ID) is the ID of the group,the second field (Stage_ID) is the ID of the record it is associated toin Table four.Table Four (Stages)- List of Event Stages. Each record has two fieldsthat is related to this issue. The first field (Stage_ID) is the ID ofthe stage of an event, the second record is the ID number associated tothe event. This last ID is a known value.20000024 = the Event IDI'm trying to come up with a list of Documents from the first tablethat is associated to an Event in the Fourth table.Query Analyzer shows no errors within the script. It just doesn'treturn any data. I know that it should, if it does what I'm wanting itto do.SELECT Document_ID FROM Documents as A where ((SELECT Event_ID FROMStages as D WHERE (D.Stage_ID = (SELECT Stage_ID FROM Groups as C WHERE(C.Group_ID = (SELECT Group_ID FROM Activity as B WHERE (B.Activity_ID= A.Activity_ID))))))= '20000024')
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Jul 24, 2012
I'm trying to write a 3 table query using two LEFT JOINs. Originally, I only had one LEFT JOIN and prior to the addition of the the third table (parts) this query worked. Now it doesn't. I think it has to do with my GROUP BY.
SELECT
quote.quote_id, parts.material, machining_operations.machine, machining_operations.per_roughing, machining_operations.per_of_machining,
machining_operations.programming_time, machining_operations.setup_time, machining_operations.cycle_time, machining_operations.notes
quote.part_name, quote.revision_no, quote.quantity, quote.initial_volume, quote.final_volume, quote.material_price, machining_operations.mo_id
FROM quote
LEFT JOIN machining_operations
ON machining_operations.quote_num = quote.quote_id
LEFT JOIN parts
ON parts.package_no = quote.package_no AND parts.part_name = quote.part_name
GROUP BY quote.quote_id
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Aug 11, 2005
SQL Server 2000Howdy All.Is it going to be faster to join several tables together and thenselect what I need from the set or is it more efficient to select onlythose columns I need in each of the tables and then join them together?The joins are all Integer primary keys and the tables are all about thesame.I need the fastest most efficient method to extract the data as thisquery is one of the most used in the system.Thanks,Craig
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Sep 25, 2013
The data I am pulling is correct I just cant figure out how to order by the last 8 numbers that is my NUMBER column. I tried adding FOR XML AUTO to my last line in my query: From AP_DETAIL_REG where AP_BATCH_ID = 1212 and NUMBER is not null order by NUMBER FOR XML AUTO) as Temp(DATA) where DATA is not null
but no change same error.
Output:
1234567890000043321092513 00050020
Select DATA from(
select '12345678'+
left( '0', 10-len(cast ( CONVERT(int,( INV_AMT *100)) as varchar))) +
cast (CONVERT(int,(INV_AMT*100)) as varchar) +
left('0',2-len(CAST (MONTH(DATE) as varchar(2))))+
CAST (MONTH(DATE) as varchar(2)) +
left('0',2-len(CAST (day(CHECK_DATE) as varchar(2)))) +
CAST (day(DATE) as varchar(2))+right(cast
(year(DATE)
[code]....
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May 23, 2008
This is my problem
Table A Columns:
OriginatingNumber,
TerminatingNumber
Both of these columns contain npanxx numbers which would be the first 6 digits of a phone number, example 217345 which is in illinois.
Table B Columns:
npanxx,
state
table B hold all npanxx numbers in the united states and what state it pertains to.
what i need to do is run a query to check and see what state the OriginatingNumber and the TerminatingNumber are in and decide if both numbers passed are in the same state or not.
so for example in Table A Row 1: OriginatingNumber is 217345 and the TerminatingNumber is 309454. I need to check both of these numbers against table B and it would return that both numbers are in IL. Basically I need to return a result of yes or no. yes they are in the same state or no they are not in the same state.
Any help would be great
Thanks for reading,
Nick
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Dec 13, 2007
Hi all,
lets say i have a table as follows
id name1 red2 orange3 green
and this has s join to another table via the id
table2
id event 1 stop2 stop3 start
now if i make a view and drop these two tables the jkoin is there but i would liek to report on all names who have a event of "go"but it gives me no results , which is right . but how can i output all the names and in the evnet put a empty SO
name eventred emptyorange emptygreen empty
thanksrobby
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Jul 20, 2005
Hello,I am quite new to ms-sql and I have a problem : I want to create an SQLrequest which would copy serveral records from a table in a given databaseto another table (with exactly the same structure) in another database(theses two tables and databases already exist).Could you please tell me how to do this ? I dont know how to access twodifferent databases in a single SQL request.Thank you for you help.
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Oct 8, 2015
I was writing a query using both left outer join and inner join. And the query was ....
SELECT
S.companyname AS supplier, S.country,P.productid, P.productname, P.unitprice,C.categoryname
FROM
Production.Suppliers AS S LEFT OUTER JOIN
(Production.Products AS P
INNER JOIN Production.Categories AS C
[code]....
However ,the result that i got was correct.But when i did the same query using the left outer join in both the cases
i.e..
SELECT
S.companyname AS supplier, S.country,P.productid, P.productname, P.unitprice,C.categoryname
FROM
Production.Suppliers AS S LEFT OUTER JOIN
(Production.Products AS P
LEFT OUTER JOIN Production.Categories AS C
ON C.categoryid = P.categoryid)
ON
S.supplierid = P.supplierid
WHERE
S.country = N'Japan';
The result i got was same,i.e
supplier country productid productname unitprice categorynameSupplier QOVFD Japan 9 Product AOZBW 97.00 Meat/PoultrySupplier QOVFD Japan 10 Product YHXGE 31.00 SeafoodSupplier QOVFD Japan 74 Product BKAZJ 10.00 ProduceSupplier QWUSF Japan 13 Product POXFU 6.00 SeafoodSupplier QWUSF Japan 14 Product PWCJB 23.25 ProduceSupplier QWUSF Japan 15 Product KSZOI 15.50 CondimentsSupplier XYZ Japan NULL NULL NULL NULLSupplier XYZ Japan NULL NULL NULL NULL
and this time also i got the same result.My question is that is there any specific reason to use inner join when join the third table and not the left outer join.
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Nov 15, 2006
Hi all,
How do I query two tables in different databases on the same SQL Server?
In short, I want to do:
Select A.*
from database 1. table 1 as A
inner join database 2. table 1 as B
on A.COL1 = B.COL1
Both database 1 and 2 are on the same SQL Server.
Please advise.
Thanks,
V
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Apr 18, 2006
Hi, while I'm trying to do Select statements, is there a way/setting whereby I don't have to constantly prefix the table names with a prefix?
For example, I'm working in multiple environments and they're differentiated by the prefix in their table names, uat.** vs prod.**
Any help would be appreciated.
Please email me at dickson.lau@rogers.com
Thanks again.
Dickson
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Dec 8, 2005
I get a 90-120 second blocking when send 15 or so simultaneous queriesto SQL Server 2000 that query a view made up of two joined tables.After each query is blocking for the same amount of time they allreturn. Further identical queries of this type work in 3-4 seconds(caching?) until hours later where it happens again. If I query thetables directly (without the view) I still get the same blocking. If Iremove the join (it is a simple inner join on two columns) I do not getthe blocking.Any ideas?
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Jan 18, 2006
This seems like a very simple question but i have never been able tofind an easy answer to it.I have a user table and i do a join with another table, we'll call theother table a results table.The results table has numerous rows with the userid foreign key.I want to make a query that will give me the number of rows in theresults table for each user where the result is some valueThe query is simple to make but will only show the users who have arecord in the results table the meet the where criteria, however i wantto display each user and show a record count of 0 when there are noresults in the results table that match the criteria.for example i have 2 tables.tblUsers_______________userid | username--------------------------1 | user12 | user2tblAnswers________________userid | answer----------------------------1 | 11 | 01 | 42 | 12 | 0if i run the query:select max(username), count(answer) from tblUsersleft outer join tblanswers on tblAnswers.userid = tblUSers.idwhere tblAnswers.answer = 4group by tblUsers.idi just getuser1 | 1i want to getuser1 | 1user2 | 0the only way ive found to do this is with a temp table and a curser tocreate all the users records and go back through an insert the answercount for each user. This approach seems very expensive and requires aquery that is 3 times larger than is needed for the same resultswithout including 0 count records. I know there must be a better way todo this.Any help is appreciated.
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Dec 27, 2006
Hi all,
I'm using SQL Server 2005 Express Edition, and I have restored a database that was using SQL Server 2000 previous. All of that went fine - sprocs and tables/data all made it.
However, when viewing the tables in the object explorer in the management studio, all the tables are prefixed with the schema name (testuser - so the table names are like: testuser.pn_user). Now, all of the code I have queries the tablename only without prefixing testuser to it - but this doesn't work anymore (invalid object name.)
I've tested, and if I prefix the table names in my code with "testuser.", it starts working again, but would rather avoid doing this. Is there something I can do within Sql Server? I've made the "testuser" account "mapped" to the database I'm using (not sure what that means - I'm more of a software developer than a database guy.) Also, when I do "Properties" for the "testuser," the default database is set to the one I'm trying to query w/o the schema.
Any ideas?
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Jan 4, 2004
I am trying to query multiple tables that have the same column. They are a supposed to be a unique ID to the product, but not to the database. I have a primary key already set to each othe tables. The tables do not share anything between them, but i would like to search for these IDs in other tables before my insert command is executed. I am writing my code in VB. example of what i am trying to accomplish.
Table1 = TVs
ID/SKU_ID/Manufacturer
1 87654 Samsung
Table2 = DVD_Players
ID/SKU_ID/Manufacturer
2 765234 Kenwood
I want to search for SKU_ID in multiple tables( I think a total of 9 tables). I want to search between tables to catch for the same SKU_IDs. and if it finds it, raise error. I will be able to figure the vb.net portion. I just dont know how to go about the sql query portion. Thanks in advance and appreciate any help. Thanks!
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Jun 7, 2005
What I am trying to do now is combine multiple complex queries into one table
and query it showing the results on an ASP.net page.
I am currently using SQL Server 2000 backend. Each one of these queries are
pretty complex so I created each query as a Stored Procedure. These queries are
dynamic by each user, so the results will never be the same globally.
What I have done so far was created a master stored procedure passing the
current user's username as a parameter. Within the master SP (Stored Procedure)
it creates a temporary table inserts and executes multiple stored procedures and
inserts into the temporary directory. Each of the sub stored procedures all
have the same columns. After the insert to the temp tables, I then query the
temp table and return it to the function it was executed in code and fill it as
a System.Data.DataTable. I then bind the DataTable to a
Repeater.DataSource.
Problem: When the page is rendered, it returns nothing. I
tested the master SP in the data environment and it works fine.
Suspect: ASP.net when the SP is executed, it sees that the
data is a disconnected datasource? Perhaps the session in the SQL Server when
the temp table is created isn't in SYSOBJECTS system table?
Here is an example of the code from the master SP:
CREATE PROCEDURE dbo.TM_getAlerts @Username
varchar(32)ASCREATE TABLE #MyAlerts ([DATE] datetime, [TEXT]
varchar(200), [LINK] varchar(200) )
INSERT INTO #MyAlertsEXEC
TM_getAlertsNewTasks @Username
INSERT INTO #MyAlertsEXEC
TM_getAlertsLateTasks @Username
SELECT [DATE] AS 'DATE', [TEXT]
AS 'TEXT', [LINK] AS LINK FROM #MyAlerts
GO
It is a fairly simple call... but why doesn't ASP.net doesn't see it when the
the DataTable is filled. I tried just executing one of the sub SP without
creating temporary tables and it works flawlessly. But the query in one of the
sub SP is a normal but complex select.
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Apr 23, 2008
I think this should be a dead easy one.
SQL Server 200.
Can I query to find all the tables in a single schema? I can't for the life of me find this one out!
I'm currently using a dreaded cursor with an exists test to get the results I want but there is surely an easier way!
Cheers,
G
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Jul 23, 2005
Hi;I am looking for suggestions about how to solve a problem using tsql.I have been asked to create a report concerning 4 tables.Each of the 4 tables is in its own database.The 4 tables are identical in name and structure.I would like to query all 4 of these tables and get the results as ifthey were one table.All suggestions welcome, thanks.Steve
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Mar 15, 2008
Please, could anyone tell me how to get information from which attribute of which table is the attribute from the view derived(it could also be a complex expression, not just attribute)through querying system tables or views(INFORMATION_SCHEMA, preferably if possible, because it's standard)
i'm using MSSQL2005.
Thank you!
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Sep 3, 2007
I am learning T SQL and SQL queries and have limited VB knowledge, and have a some simple queries to run on a table with parameters, and would like verification of the proposed methodology and suggestions.
Simply put, I have a [Transactions] table with columns [Price], [Ticker], [TransDate], [TransType] and calculated columns for [Days] and [Profit].
There are two parameters, [@Dys] (to query a the table for transactions within a certain period[Days = 30] and [@TT] to query only the closed transactions ie... [TransType='C']
I have been studying Stored Procedures and will be writing a Stored Procedure, but need verification if the following will work... Getting the SUM and AVG calcluations for the fields above is not a problem but I need to display SUM and AVG information also for those transactions where [Profit >0] and [Profit <0], which is easy enough by creating a subquery. But the problem is:
1. If I use a SubQuery for [Profit <0] and for [Profit>0], can I create an alias for [Count(*)] (to get a row or transaction count for each, and then divide that into the Total [Count(*)] alias for the Transactions table to get a value for % profitable or Probability (% total Profitable trades versus % total Unprofitable trades)?
2. Or, do I need to create either temporary tables or views to have 3 distinct tables (1 table for Transactoins and 2 temp or Views for [Profit >0] and [Profit <0])?
Any suggestions and advice or examples on how to do this would be appreciated.
Craig
My questions are:
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Jun 19, 2014
Table CYCLE has two columns
id
name
Table TEST has two columns
id
name
Table TESTCYCL has three columns
id
cycle_id (reference to id field in CYCLE table)
test_id (reference to id field in TEST table)
I need SQL to get CYCLE.name and TEST.name. If there is no associated row in the TEST table, I still want the CYCLE.name.
SELECT CYCLE.name, TEST.name
FROM CYCLE
JOIN TESTCYCL ON TESTCYCL.cycle_id = CYCLE.id
JOIN TEST ON TEST.id = TESTCYCLE.test_id
This only returns rows from CYCLE where there is a related row in TEST. I need all rows from CYCLE whether there is a row in TEST or not.
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Dec 21, 2005
Imran writes "Hello there
This is Imran, will pray for you if u help me out with this problem
I have 2 tables
Developments
------------
->DevelopmentId - AutoNum
ProjectName
Development_Pictures
--------------------
->Auto
DevelopmentId
PicName
PicType
The two tables are linked by DevelopmentId. Each record in developments can have many related records in Development_Pictures.
Now i want all records from Developments
along with the PicName. The thing is that only to show
picName where the PicType is 'Big'
ProjectName, PicName
Thank You
where the "
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May 14, 2007
Hi,
How can I do this using INNER JOIN:
4.From tables RubricReport, RubricReportTemplate, RubricReportDetail and SppTarget, get columns:
a.RubricReport
i.ReportID
ii.LastUpdate
iii.LastUpdateBy
b.RubricReportTemplate
i.IndicatorNumber
ii.Topic
iii.Part
iv.ILCDComponent
c.RubricReportDetail
i.LocalPerf
ii.GoalMet
d.SppTarget
i.Target
5.Matching these columns in the above four tables:
a.RubricReport.ReportID=RubricReportDetail.ReportID
b.RubricReportDetail.IndicatorID=RubricReportTemplate.IndicatorID
c.SppTarget.IndicatorNumber=RubricReportDetail.IndicatorNumber
d.SppTarget.Years=@DataYears
I have looked a lot but couldn't find INNER join for three tables.
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Aug 3, 2007
Hi All,
I require to perfom a join on 3 tables within the same query . To explain myself better i have 3 tables
Main table
Label table
textbox table
The Main table contains the common fields in both the label and textbox table. While the label and textox table contain the fields that are sepcfic to them .
MAIN Table
pk Moduleid ItemName itemtype
36
372
test1
4
37
372
test2
4
38
372
test3
4
39
372
test4
6
40
372
test5
4
label
pk Main_fk labeltext
4
36
labeltext1
5
37
labeltext2
6
38
labeltext3
7
40
labeltext4
Textbox
pk Main_fk textboxtext
1
39
textbox1
I did infact manage to perform a join on these these tables.
Select * From tb_Main
inner join tb_Label
on tb_Main.pk = tb_Label.main_fk
where moduleID = @moduleID
Select * From tb_Main
inner join tb_textbox
on tb_Main.pk = tb_textbox.main_fk
where moduleID = @moduleID
The problem is that it returns two separate results . I require a join on the label and textbox table within the same query to return one result.
Is what im asking possible? I would appreciate if some exmaples are posted
I have no control on the design of the tables as i didnt create them but still if anyone has a suggestion on improving them please do ,so i can tell my colleague that they aren't designed well !!!!
Thanks in advance
Matt
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Nov 8, 2006
I need help in writing a query.
The query should get top 10 items and their values from current year and the values for the same items from previous year table.
I was able to write the code for 1st part that gets values from 1st table but I don't know how to get the values from 2nd table.
The 2 tables does not have any primary/foreign key relations. Both tables have same structure and same columns.
I am attaching some images below to give more information.
Image of results from my query.
Image of how the final output should look like.
The Store Procedure code is:
ALTER Procedure [dbo].[free_customsHS4](
@TblName1 varchar(20),
@TblType varchar(20),
@District varchar(6),
@Month varchar(3)
)
AS
Begin
SET NOCOUNT ON;
Declare @SQuery nvarchar(3000)
set @TblName1 = '[' + @TblName1 + ']'
set @TblType = '[' + @TblType + ']'
SELECT @SQuery = 'select top 10 a.commodity1 as HS4, b.descrip_1 as Description,
sum(a.all_val_mo) as [Amount],
(sum(a.all_val_mo)/(select Sum(a.all_val_mo) FROM ' + @TblName1 + 'a
where a.stat_month <=' + @Month + ' and a.district=' + @District +'))*100 as [% Share]
FROM ' + @TblName1 + ' a left outer join ' + @TblType + ' b on a.commodity1=b.commodity1
where a.stat_month <=' + @Month + ' and a.district=' + @District +'
Group by a.commodity1, b.descrip_1
order by [Amount] desc'
EXEC sp_executesql @SQuery
END
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Jun 14, 2001
Is it possible to utilize more than two tables in a single outer join?
I have one table that I want every row and 18 others where I only want an entry if one is present meeting the conditions of "1.customerid = 2.Customerid" etc. I haven't run across this before and would appreciate any help.
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Dec 7, 2013
Table 1:
id amount
1 100
2 200
3 300
4 400
Table 2:
id amount
1 100
1 100
2 200
3 300
4 null
Table 3:
id amount
1 null
2 200
2 200
3 300
3 200
4 null
id is common for each tables , how can i get output like this:
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id t1 t2 t3
1 100 200 null
2 200 200 200
3 300 300 500
4 400 null null
I am stuck with this query .
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Feb 4, 2015
I have a general question concerning joins. Below is a table scenario:
SELECT *
FROM TABLE_A T0
INNER JOIN TABLE_B T1 ON T1.[Some_Column] = T0.[Some Column]
LEFT JOIN TABLE_C T2 ON T2.[Some_Column] = T0.[Some Column]
Does the above indicate that all records in common between TABLE_A & TABLE_B will be returned, then the records from TABLE_C will be joined to the initial 'result set' (that is the result of joining TABLE_A & TABLE_B), or will TABLE_C simply be joined to TABLE_A regardless of the inner join between TABLE_A & TABLE_B?
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Jul 20, 2005
I am writing a download process in which i have a condition where ineed to join four tables. Each table have lot of data say around300000 recs.my question is when i am doing the joins on the columns is there anyspecific order i need to follow.for exampleMy original query looks like thisselect a.col1,a.col2from ainner join bon a.id1=b.id1and a.id2=b.id2inner join con c.id1=b.id1and c.id2=b.id2inner join don d.id1=c.id1and d.id2=c.id2If i change the query like below... does it make any differenceselect a.col1,a.col2from ainner join bon b.id1=a.id1and b.id2=a.id2inner join con c.id1=a.id1and c.id2=a.id2inner join don d.id1=a.id1and d.id2=a.id2Any help is appreciated.ThanksSri
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Oct 30, 2006
I had a SP to generate a recordset for a MIS report. It had 11 temp tables , basically taking data from real tables , performing some aggregation and counts and passin on the records to a temp table which gave the result as desired ..ofcourse with some group by clauses...
Now i replaced these temp tables (most of them..left with just 2), and used derieved tables instead in the final query..and joins which will execute with each query iteration..something of the sort
select col1,co2 ,
(select count(id) from sometable x group by sayaccount where x.id = temp.id) ,
(select sum(id) from (select count(id) from sometable group by sayaccount) DERIVED_Tab),
......
from #finaltemp temp
group by col1.....
(earlier the count was stored in 1 temp table, then sum one n stored in other).
the idea was to reduce the execution time...but i din achieve it...not with just a single user running the report i.e , rather it marginally increased. my thinking was that i'll be avoiding the locks on tempdb by reducing the number of temp tables....pls tell me if im goin wrong...i still have the option of using table datatype if thats feasible..
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