How To Write Queries In C#
Nov 7, 2006
hi,
i am working on asp.net development server. i have created a web page on which i have put some option to enter the any user id. as soon as user id is entered on button click i want to search the first name, last name, age in my database where i have inserted the table with entries. then i wan to display it on the page.
Please tell me how can i write the C# code on the clicking event so that i get results. i have connected the database to my virtual server.
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Feb 12, 2008
Hi.
I want create a queries that is
1. Item onhand > 0
2. For next 14 day this item does not have any Sales Order.
Because our product has shelf life issue, So I want to know which kind product that I have onhand and doesn't have any sales order for the next 2 weeks.
Item Table is T1 and Sales Order Table is T2.
Thanks
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Mar 9, 2005
Trying to work on INNER and OUTER JOIN. Can someone help me to write to SQL statements.
Thanks
Sam
Consider the following schema:
suppliers(sid: integer, sname: string, address: string)
parts(pid: integer, pname: string, color: string)
catalog(sid: integer, pid: integer, cost: real)
Write the following queries in SQL:
1. Find the pname of parts for which there is some supplier.
2. Find the snames of suppliers who supply every part.
3. Find the snames of suppliers who supply every red part.
4. Find the pnames of parts supplied by Acme Widget Suppliers and no one else.
5. Find the sids of suppliers who charge more for some part than the average cost of that part.
6. For each part, find the sname of the supplier who charges the most for that part.
7. Find the sids of suppliers who supply only red parts.
8. Find the sids of suppliers who supply a red part and a green part.
9. Find the sids of suppliers who supply a red part or a green part.
10. For every supplier that only supplies green parts print the name of the supplier and the total number of parts that she supplies.
11. For every supplier that supplies a green part and a red part, print the name and price of the most expensive part that she supplies.
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Feb 5, 2014
I have one table which consists of data in the following manner
Child Parent
ZN1 NS
ZN2 NS
A1 ZN1
A3 Zn1
A2 Zn2
A4 Zn2
IT1 A4
It2 A3
It3 A2
It5 A1
Now i want to display the information in the follwing manner.
Zn1 NS
A1 Zn1
It5 A1
A3 Zn1
It2 A3
Zn2 NS
A2 Zn2
It3 A2
A4 Zn2
IT1 A4
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Aug 24, 2006
I need to write Crosstab Queries just like this,
Qty + previous qty = TOT
QTY TOT
1 1
5 6
3 9
9 18
2 20
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Jul 22, 2004
I'm trying to code a query in Access that finds rows w/ duplicate "ContactKeys" then finds duplicate "AddressLine1s" out of the list of duplicate "ContactKeys." (I tried subqueries but it was really slow)
I am trying to create a new table with only duplicate ContactKey rows, and then I wanted to use that table to pick out the duplicate AddressLine1 rows.
Code:
SELECT *
INTO dupContactKeys
FROM Contacts
WHERE ContactKey IN (
SELECT ContactKey
FROM Contacts
GROUP BY ContactKey
HAVING COUNT(*) > 1)
SELECT *
FROM dupContactKeys
WHERE ContactKey IN (
SELECT AddressLine1, Zip
FROM Contacts
GROUP BY AddressLine1, Zip
HAVING COUNT(*) > 1)
ORDER BY ContactKey, TypeKey;
drop table dupContactKeys
This of course doesn't work. Please help, as I am going slightly mad!
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Sep 19, 2013
I have to do following scenario,
if 1st query Then 2nd Query
Else 'Msg'
How Can i do this using Case Statement??how can do this by Other way??
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Jul 12, 2006
Hi,
I tried to backup the master key by the following syntax :
OPEN MASTER KEY DECRYPTION BY PASSWORD = 'mypassword'
BACKUP MASTER KEY TO FILE = 'c: empmaster' ENCRYPTION BY PASSWORD = 'mypassword'
but it failed and i got the following message:
Cannot write into file 'c: empmaster'. Verify that you have write permissions, that the file path is valid, and that the file does not already exist.
NB: I am using the "sa" user to execute this command.
I know that we have a security permission issue , but where and how ?
Regards,
Tarek Ghazali
SQL Server MVP
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Jul 20, 2005
HelloWhen I use a PreparedStatement (in jdbc) with the following query:SELECT store_groups_idFROM store_groupsWHERE store_groups_id IS NOT NULLAND type = ?ORDER BY group_nameIt takes a significantly longer time to run (the time it takes forexecuteQuery() to return ) than if I useSELECT store_groups_idFROM store_groupsWHERE store_groups_id IS NOT NULLAND type = 'M'ORDER BY group_nameAfter tracing the problem down, it appears that this is not preciselya java issue, but rather has to do with the underlying cost of runningparameterized queries.When I open up MS Enterprise Manager and type the same query in - italso takes far longer for the parameterized query to run when I usethe version of the query with bind (?) parameters.This only happens when the table in question is large - I am seeingthis behaviour for a table with > 1,000,000 records. It doesn't makesense to me why a parameterized query would run SLOWER than acompletely ad-hoc query when it is supposed to be more efficient.Furthermore, if one were to say that the reason for this behaviour isthat the query is first getting compliled and then the parameters aregetting sent over - thus resulting in a longer percieved executiontime - I would respond that if this were the case then A) it shouldn'tbe any different if it were run against a large or small table B) thisperformance hit should only be experienced the first time that thequery is run C) the performance hit should only be 2x the time for thenon-parameterized query takes to run - the difference in response timeis more like 4-10 times the time it takes for the non parameterizedversion to run!!!Is this a sql-server specific problem or something that would pertainto other databases as well? I there something about the coorect use ofbind parameters that I overall don't understand?If I can provide some hints in Java then this would be great..otherwise, do I need to turn/off certain settings on the databaseitself?If nothing else works, I will have to either find or write a wrapperaround the Statement object that acts like a prepared statement but inreality sends regular Statement objects to the JDBC driver. I wouldthen put some inteligence in the database layer for deciding whetherto use this special -hack- object or a regular prepared statementdepending on the expected overhead. (Obviously this logic would onlybe written in once place.. etc.. IoC.. ) HOWEVER, I would desperatelywant to avoid doing this.Please help :)
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Jul 27, 2006
I have a table T1
ID Desc
1 aaaa
1 bbbb
1 cccc
2 aaaa
2 cccc
3 cccc
Now, I need to group by ID and make Desc column as follows in a new table
ID Desc
1 aaaa, bbbb, cccc
2 aaaa, cccc
3 cccc
How can I do this?
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Jul 28, 2006
I have table T1 with fields T1.ID, T1.CheckBoxCol
The T2 tabel has the same ID as T2.ID and T2.CheckBox1, T2.CheckBox2, T2. CheckBox3
Now, I need to check T1 and
if T1.CheckBoxCol=1 then set T2.CheckBox1=1
else if T1.CheckBoxCol=2 then set T2.CheckBox2=1
else if T1.CheckBoxCol=3 then set T2.CheckBox3=1
for each T1.ID
How can I do this?
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Jan 1, 2007
Hello,
I have MyTable with ID, IsYesNo fields
ID is duplicated so I need perform select on MyTable with the following conditions:
1. Select all the ID distinct where IsYesNo=’Yes’ first
2. Then select all the ID distinct where IsYesNo=’No’ if ID is not in the first selection
Combine these two and return the result
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Apr 29, 2007
I'm sure this is really basic. I've created a simple form that on submittal, I would like the text boxes to be submitted to the database. I have successfully created the Datasource and it connects ok, but what code would i use to submit one text box for email address and a simple submit button. Is there an easy way to do this with VWDE?
Thanks
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Aug 29, 2007
Hi,I
have a hotel reservation system.I need to implement Check availability
(Room checking) function for the project.But I dont understand how do I
start and write SQL for this.Here is table structureTblRooms------------RoomsIDRoomNameNoteunitPriceSeasonalOffersTblReservation----------------ReservationIDArrivalDateDepartureDateArrivalFromFlightNoPurposeOfVisitTblRoomsInventory-------------------RoomsInventoryIDTotalRoomsBookedRooms Should I add more fields or table to implement this or this is enough .please any body can help me
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Sep 14, 2007
How to write this SQLSelectCommand="SELECT DISTINCT TblOrder.CustomerUID, TblOrder.OrderHiddenID, TblPayment.PaymentAmount, TblPayment.Result, TblOrder.OrderID FROM TblOrder CROSS JOIN TblPayment WHERE (TblOrder.CustomerUID = @IsCustomerID) AND (TblOrder.OrderHiddenID = @IsHiddenID) AND (TblPayment.Result = 'Pending')"How to get latest order id from this.I need to combine it with above sql.I mean i want to select above records but based on max orderid record.such as select latest records from ....above SQL where max orderid
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Jul 7, 2004
I need to compare two column in two different tables but I do not know how to write this query.
Example:
Table1
-------------
EmployeeSSN
EmployeePayRate
Table2
-------------
EmployeeSSN
EmployeePayRate
I need the result set to look like this
Result Set
-----------------------------------------------------
EmployeeSSN T1Rate T2Rate Same?
-----------------------------------------------------
111-11-1111 8.95 8.95 True
222-22-2222 9.95 8.95 False
333-33-3333 8.95 NoMatch False
444-44-4444 NoMatch 8.95 False
and so on....
How do I write this in Transact-SQL also using a function to return the "NoMatch" and True or False statements?
Thanks,
Roger
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May 9, 2002
Hey all.. Sorry I have never written a SP in my life.
so this would be a newbie question for sure.
Using sql server 7.
Here is my table field setup with sample values all fields are numeric
except date
weekending size effic dailycap workdays planutil demand
variance
5/172002 8 80 85 5 244
102 142
A file with source data will be made available in comma delimitted format to
supply a new weekending value, size and demand.
What I will need is first the dts to bring that in. then I am assuming a
stored procedure to be run (this is why I am here)
to add the data from the comma del. file into the table. If the data EXISTS
I would want it to UPDATE the values that are in the dest table but run a
calculation first which would be the planutil minus demand then the result to
be updated intot the record.
if the record from the tab del. file does not exisst in the dest table then
insert it.
another words the logic i have in mind
read the data from the temp tample (where the file gets imported into)
see if the record exists in the live table is it does update it with the calculation of planutil minus demand
if not create the new record in the live table.
I need it to compare..
Someone help me with some code
i thank you kindly in advance
p.s. And good books dedicated to stored procedures??
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Dec 1, 2006
Many thanks in advance for anyone that can help me write this qry:
To summarise - we have a database that links components to services. Components can have a 1 to many relationship with services. The components are held in a table:
dbo.components
compID compName compType
1 srv1 1
2 srv2 1
3 srv3 1
We also have a services table which hold all our various services we own:
dbo.services
svcID svcName
1052 svc1
1053 svc2
1054 svc3
We then have a tbl that shows the links between components and services
dbo.compUses
svcID compID
1052 310
1052 400
1053 122
1256 134
I would like to find out through the qry what components are currently NOT linked to a service. This will allow me to find out what components have no relationships.
This is in SQL2005.
Have I explained this well enough? Any help would be much appreciated!
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Dec 9, 2005
Hey peeps, fishkake's back, and he's more clueless than ever!
OK, after a few days of wrestling with books and experimenting, I now know all about reading SQL. Well, what that means is I understand Select From Where etc etc.
How do I write data? I have a reference guide, if somebody could give me literally a few high-level commands that are to do with writing data in a similar way to reading it with the SELECT statement, it would be very helpful...
This site is just making me lazy now...
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Apr 15, 2008
Good Afternoon all,
I was wondering how to write the TOP 5 records using Relational Algebra.
Dallr
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Nov 29, 2007
Hi,
I have to implement a search functionality. In the various filters for the search, Store Number is one such filter.
The user should be able to enter range values for store numbers.
Like 1500-1600. So this should filter for all the stores between 1500 and 1600.
Similarly, all these also should be valid.
1550,1600
1550
1550 - 1580,6000,8000
etc.
I have function which identifies the commas or dashes and seperates out the store number and returns a string like
Stores.Storenumber in(1555,1600)
Store.StoreNumber between 1555 and 1600 etc...
i generate a sql at run time and append this piece and then execute the sql.
I have one of the query below.
declare @strQuery varchar(max)
declare @strConcat varchar(10)
declare @strAppend varchar(max)
set @strAppend=''
set @StrConcat ='And '
if @IsAdmin is null-- Not a Admin
set @StoreId =(select StoreNumber from Stores where Store_Id = @StoreId)
set @strQuery='
Select
(Select StoreNumber from Stores where Store_id=d.DestinationId) as StoreNumber,
CartonNumber,
ActualReceiptDate as [Scan Date],
isnull(Sum(QtyShipped),0) as [Total Units],
b.BatchNumber
from
Carton c
left outer join
CartonDetail Cd on Cd.Carton_Id = c.Carton_ID
inner join Batch b on b.General_Id = c.Carton_Id and b.BatchType=''Warehouse'' and b.TranTable=''Carton''
inner join Document d on d.Document_ID = c.document_Id
inner join Stores st on st.Store_ID = d.SourceID and st.StoreType =5
inner join Stores on Stores.Store_ID = d.DestinationID
inner join Codelist cl on cl.Codelist_Id = c.CartonStatus_ID
inner join Codes on Codes.Code_ID = cl.Code_id and Codes.CodeType=''Cartons Status Code''
where not c.cartonNumber is null '
if not (@StoreId) is null
begin
set @strAppend = @strConcat + '(' + dbo.DecodeStoreNo(@StoreId) + ')'
End
if not (@DateFrom) is null and not (@DateTo) is null
begin
set @strAppend = @strAppend + @strConcat + '(convert(varchar(50),c.ActualReceiptDate,101) between ''' + @DateFrom + ''' and ''' + @DateTo + ''')'
End
if not (@CartonNumber) is null
Begin
set @strAppend = @strAppend + @strConcat + '(c.CartonNumber = ''' + cast(@CartonNumber as varchar) + ''')'
End
if not (@Status) is null
Begin
set @strAppend = @strAppend + @strConcat + '(cl.Codevalue = ''' + @Status + ''')'
End
set @strAppend = @strAppend + ' group by
d.DestinationId,CartonNumber , ActualReceiptDate , b.batchnumber
order by ActualReceiptDate'
set @strQuery = @strQuery +@strAppend
execute(@strQuery)
This query takes time, if there a little over 1000 records.
I wanted to know, if there is any way to optimize this query? or any other way in which the above can be accomplished.
I hope i was able to explain my query fairly. Please let me know otherwise.
Thanks
Renu.
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Mar 25, 2008
how to write an UDF and run it
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Mar 5, 2007
Hi There,
I have been working in ssis and i have a task to write a log of the all events in daily basis.
I mean writing a log for the entire package for each tasks.
Can some one help me how to do it?
Thanks
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Nov 15, 2007
Hello all!
I'm triyng to update a NULL value to another value. I know I can do this, just can't seem to write it out right.
Something like
UPDATE Part_Order
SET Ser = 'NA'
WHERE Ser isnull
I know thats not right, but I know I'm close.
Any hints?
TIA!
Rudy
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Jul 28, 2006
I have table T1 with fields T1.ID, T1.CheckBoxCol
The T2 tabel has the same ID as T2.ID and T2.CheckBox1, T2.CheckBox2, T2. CheckBox3
Now, I need to check T1 and
if T1.CheckBoxCol=1 then set T2.CheckBox1=1
else if T1.CheckBoxCol=2 then set T2.CheckBox2=1
else if T1.CheckBoxCol=3 then set T2.CheckBox3=1
for each T1.ID
How can I do this?
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Jul 27, 2006
I have a table T1
ID Desc
1 aaaa
1 bbbb
1 cccc
2 aaaa
2 cccc
3 cccc
Now, I need to group by ID and make Desc column as follows in a new table
ID Desc
1 aaaa, bbbb, cccc
2 aaaa, cccc
3 cccc
How can I do this?
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Sep 13, 2006
Hi, I have a table Projects. This table has ProjectID and Version as PK. The Version starts at 1 and everytime a project is changed, I save the project with the same ProjectID and increase the Version by 1.How can I create a query that get all Projects with the latest Version? Thx
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Oct 28, 2006
I have a Properties table like thisPropertyID PropertyValue 1 Address 2 City 3 Stateetc.and a UserProfile table like thisUserID PropertyID PropertyValue1 1 123 Main Street1 2 Denveretc.How do I write a query that can populate a registration page with Address,City, State as labels and 123 Main Street, Denver, as TextBox text?
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Nov 1, 2006
I have table T1 with the fields: ID,Type,Status,F1,F2,F3,F4 in database1. I also have T2 in Database2 which has the same fields and some extra fields. Now based on the T1.Type=Insert or Update, I need to perform either update or Insert in T2 based on where T1.ID=T2.ID and T1.Status<>’Done’. If this is a success, I need to set T1.Status=’Done’ for the updated records. So this should only be updated records. T1 is a frequently inserted table, so there might be more than one record coming there at the same time. How should I write my insert trigger and correctly set T1.Status=’Done’, any example would be greatly appreciated.
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Dec 27, 2006
How can I write a function that accepts a data as a parameter and if the date is
Last Monday in May or
First Monday in September or
4th Tuesday in November
returns true otherwise returns false.
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Feb 5, 2007
Hi I need to create query which would calculate weekly change of some values. There is table with values for every day. At the end of week I need to calculate % of change. It is something like this:SELECT ((LastFridayValue - PreviousFridayValue) / PreviousFridayValue) * 100 from myTable.or it could be something like this:(LastValue - FirstValue) / FirstValue * 100 from top 5 values from my table order by ID DESC. Please help me translate this into real sql query :)
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Sep 11, 2007
I have a table named "products", it has a column called "category", I have data such as "CategoryA", "CategoryB" and "CategoryC" etc.... now I want to do a select statement and choose "CategoryA" and "CategoryB" but I want to rename them as "A" and "B". how do I write such a statement... thanks!
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Dec 10, 2007
Following is a stored procedure I'm thinking of using in my ASP 2.0 project and I need opinions so I can evaluate if this is the optimum way to access and write to my database. I will be writing to an extra table (in addition to the standard aspnet_ tables). If you can please let me know your opinion, I'd appreciate it.
@UserName nvarchar(128), @Email nvarchar(50), @FirstName nvarchar(25), @LastName nvarchar(50), @Teacher nvarchar(25), @GradYr int DECLARE @UserID uniqueidentifier SELECT @UserID = NULL SELECT @UserID = UserId FROM dbo.aspnet_Users WHERE LOWER(@UserName) = LoweredUserNameINSERT INTO [table name](UserID,UserName,Email,FirstName,LastName,Teacher,GradYr) VALUES (@UserID,@UserName,@Email,@FirstName,@LastName,@Teacher,@GradYr)
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