Web Forms :: How To Give Multiple Inner Joins To Single Table In SQL Server
Oct 30, 2012how to give a multiple inner joins to the single table
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Table1
Id Name Class Subject
----------------------------------------
2 Sam 12 English
2 Sam 10 Maths
2 Sam 10 English
2 Sam 8 History
2 Sam 12 Economics
Here Sam teaches Class 12 - English & Economics, Class 10 - Maths & English, Class 8 - History
I want to display the result like this -
Id Name Class Subject
---------------------------------------------------------------
2 Sam 12 English, Economics
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How to concatenate multiple Rows?
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game 2: x team 6 x team 1
game 3: x team 5 x team 3
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SQL Server :: Joins - Returns A Row When There Is Matching Table In Both Tables
Jan 29, 2011Inner Join:- Returns a row when there is matching table in both tables. we can use comparison operator like =,<,>,<>
I created two tables
TableA
ID OID Type
1 1 A
2 6 B
3 7 C
4 10 D
TableB
ID Value
1 10
2 30
3 40
5 60
6 70
Basic Inner Join select Type From TableB as a inner join TableA as b on a.ID=b.OID Result Type
A
B
If i want only the type which has not match in tableB then i can use not in subquery i get the result if i m using select Type From TableB as a inner join TableA as b on a.ID<>b.OID then i get
Type
A
A
A
A
B
B
B
B
C
C
C
C
C
D
D
D
D
D
18 rows affetected i m suprise
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Mar 25, 2011I have a web service with a dataset and I need to fill a gridview in my web page with data from multiple tables (like 4). How can I retrieve data from my 4 tables and construct a datatable with a table adapter in the dataset? I need to create this in the web service to bind the gridview in my page. In SQL I create a view with the joins of the 4 tables and added the view to the dataset. It works fine, but for other windows in my web page I need to use like 8 trough 10 tables (just to retrieve one field of each one) and I don't know if making that huge joins is the more efficient way to retrieve data from the server. There is another way to make joins? (Make separate queries for each table and create one table in memory) How?
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Nov 15, 2010One of my peer wrote a query based on multiple tables using joins. One of the table is in a different database The query was taking much time
1. Create an SP
2. Create a temp table and copy all records from the external db
3. Avoid using Left Join as much as possible and use Inner Join
4. Create and use indexes
5. Remove tables/columns that are not necessary
In this scenario, I would like to suggest to use Covering Index, but how can it be created for multiple tables and a temp table?
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In sql server I made a view with the five tables (all the tables relations are working perfectly). In the web service I call the view; and in the web page I call the web service to bind the page. Everything is working. All I want to do is retrieve from the server all the necessary data only once when the page loads and bind the five tables data (like 18 fields total) in the gridview which I only show 12 fields the other 6 fields are hidden, those 6 are for the details which I get with jQuery (that's another topic). Bind everything only once and manage the data on client side. Everything is working perfectly. Here is my doubt.
How are the maximum table joins I can make? To retrieve the data via web and not get a server time out error. Which is a better way to make a faster page? Make 2 views one for the gridview and one for the details and put each view in a web service; or make one view with all the table joins and one web service. Right now all is working but I have to make other pages that use different tables and joins and I don't know if the server gets me the time out error when the page is fully working.
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[code]....
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But what I want is for the user to be able to type two or three words into the textbox and produce results where just one of the words have to match the contents of the columns cell.
I don't need to be able to do a multi column or table search, and I'm using C# and MS Access.
I imagine this question would have been asked more than a couple of times - but I can't find a decent answer.
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Jul 2, 2010The gist of the problem is that we have an alumni table (one record per person) and also a couple of other tables (one to many) that have degree info and interest info. In a search screen in our app you can search for criteria that spans all three tables (there are actually more fields and tables than shown in the example below but I am trying to keep it simple).
The code below works (properly returns people without degrees for example) but still feels a little clunky or over-engineered to me. Are there easier ways to do this? NOTE: I have been through quite a few iterations/approaches to making the correct data be returned.
[code]....
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Jan 28, 2011I have some problems trying to query my database. The problem is that I'm not sure how to multiple join tables in my database.
tables to make it easier:
[code]....
What I'm supposed to do is to find all the teachers (predavac) who were teachers on the specific activity (aktivnost) and who had specific attendee (polaznik). The problem is I'm not sure how to do multiple joins on this one.
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Oct 15, 2010I have 2 tables:
- Salesmen with Pk.SalesmenID
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How can I check if every salesmen has at least one appointment
Am I on the right way with statement below, though I got syntax problems
[Code]....
DataSource Controls :: How To Optimize Query With Multiple Inner Joins
Mar 22, 2010I have one question regarding how to make the below mentioned type of query more optimized so that mine query perfomace can be increased.
Select a.name1,a.address1,b.field3,c.field4,d.field6,e.field7
from a
inner join b on a.id=b.id
inner join c on c.id=b.id
inner join d on d.id=c.id
iner join e on e.id=d.id
union all
Select a1.name1,a1.address1,b1.field3,c.field4,d.field6,e.field7
from a1
inner join b1 on a1.id=b1.id
inner join c on c.id=b1.id
inner join d on d.id=c.id
iner join e on e.id=d.id
union all
Select a2.name1,a2.address1,b2.field3,c.field4,d.field6,e.field7
from a2
inner join b2 on a2.id=b2.id
inner join c on c.id=b2.id
inner join d on d.id=c.id
iner join e on e.id=d.id
All the above three select query at last using the same inner join condition, means last two inner join condition are the same for all the select query.
Is there any way so that this query can be optimized?
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I've boiled my code down to the following conceptualized structure:
[code]....
When you click the update button, you return to the listview, but with only the information from your current tab saved. How can I get it to update from both detailsviews?
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Jan 5, 2011My table is :
ID Dated
-------------------------
1 2010-01-01 00:00:00.000
2 2010-02-20 00:00:00.000
3 2010-09-15 00:00:00.000
4 2010-04-03 00:00:00.000
5 2010-11-09 00:00:00.000
6 2010-12-11 00:00:00.000
7 2011-01-18 00:00:00.000
Now I want to find(select) Id and dated columns which have a difference of 4 months(less or greater than) from previous ID (row).
Expected Result
ID Dated
1 2010-01-01 00:00:00.000
2 2010-02-20 00:00:00.000
6 2010-12-11 00:00:00.000
7 2011-01-18 00:00:00.000
How to do this.
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Sep 9, 2010I have to insert a multiple records under the single table.So i have to execute the command in the frontend for every records.
Inorder to avoid i write the query like this
insert into table1(field1,field2) values('1','Test1'),('2','Test2');
and also i tried
insert into table1(field1,field2)
SELECT "1","Test1"
Union all
SELECT "2","Test2"
But I am getting syntax error.
How to insert a multiple records under the single query?
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Oct 20, 2010I'm using this code for creating and xml file out of a SQL2005 table:
[Code]....
Is there a way for me to create multiple xml files, one for every row, going by the primary key column, or do I have to create a separate query for each row?
I would also wondering what is the syntax for transforming this query into a stored procedure
SQL Server :: Assign Multiple Variables In A Single Select?
Feb 4, 2011I am using MS SQL Server 2005 & here is my problem: I need to assign values to the multiple variables in a single select. But each value is depend on the certain value of the other column of the table.
declare @i1 Int, @i2 Int, @i3 Int;
select
case Table.column1
when 'red' then @i1 = Table.column2
when 'green' then @i2 = Table.column2
when 'blue' then @i3 = Table.column2
end
from
dbo.Table
how to achieve this in a single select?
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Mar 10, 2011I tried nested ListViews but can get the display wanted.In my database I have a Category Table and a Product table.They share the CG_ID value.I want to make a stored procedure that will use two select statements to produce a single table.that can be used as a ListView DataSource.
[code]...