From In To Exists

Dec 6, 2007

Dear all,
i'm trying to replace in with exists...
i've changed the query but still i'm getting error.
please let me know where i'm missing

DELETE FROM table25 WHERE Col6='SET' AND Col1 IN (SELECT s.Col1 FROM Table24 s
WHERE Col2='some_data1' AND Col3='some_data2' AND Col4='somedata3')

DELETE FROM table25 r WHERE r.Col6='SET' AND exists (SELECT s.Col1 FROM Table24 s
WHERE r.col1=s.col2 and Col2='some_data1' AND Col3='some_data2' AND Col4='somedata3')

thank you very much

Vinod
Even you learn 1%, Learn it with 100% confidence.

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IF NOT EXISTS (... - EXISTS TABLE : Nested Iteration. Table Scan.Forward Scan.

Sep 20, 2006

Hi,

This is on Sybase but I'm guessing that the same situation would happen on SQL Server. (Please confirm if you know).

I'm looking at these new databases and I'm seeing code similar to this all over the place:

if not exists (select 1 from dbo.t1 where f1 = @p1)
begin
select @errno = @errno | 1
end

There's a unique clustered in dex on t1.f1.

The execution plan shows this for this statement:

FROM TABLE
dbo.t1
EXISTS TABLE : nested iteration.
Table Scan.
Forward scan.
Positioning at start of table.

It's not using my index!!!!!

It seems to be the case with EXISTS statements. Can anybody confirm?

I also hinted to use the index but it still didn't use it.

If the existence check really doesn't use the index, what's a good code alternative to this check?

I did this and it's working great but I wonder if there's a better alternative. I don't really like doing the SET ROWCOUNT 1 and then SET ROWCOUNT 0 thing. SELECT TOP 1 won't work on Sybase, :-(.

SET ROWCOUNT 1
SELECT @cnt = (SELECT 1 FROM dbo.t1 (index ix01)
WHERE f1 = @p1
)
SET ROWCOUNT 0

Appreciate your help.

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Jul 7, 2006

Hello,
I am trying to create a table if one with the same name does not exists. My code is:
Dim connectionString As String = "Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|PensionDistrict4.mdf;Integrated Security=True;User Instance=True"
Dim sqlConnection As SqlConnection = New SqlConnection(connectionString)
Dim newTable As String = "CREATE TABLE [" + titleString + "Comments" + "] (ID int NOT NULL PRIMARY KEY IDENTITY, Title varchar(100) NOT NULL, Name varchar(100) NOT NULL, Comment varchar(MAX) NOT NULL, Date datetime NOT NULL)"
sqlConnection.Open()
Dim sqlExists As String = "IF EXISTS (SELECT * FROM PensionDistrict4 WHERE name = '" + titleString + "Comments" + "')"
Dim sqlCommand As New SqlCommand(newTable, sqlConnection)
If sqlExists = True Then
sqlCommand.Cancel()
Else
sqlCommand.ExecuteNonQuery()
sqlConnection.Close()
End If
I keep getting a "Input String was incorrect format" for sqlExists? I am new to Transact-SQL statements, any help would be appreciated.
Thanks Matt

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May 27, 2007

ok i have 2 tables---one table is name CourseInformation with a field named Instructor and the data in there looks like this 'John Doe'.
My other table Instructors has 3 fields InstructorName, LastName, FirstName.
I am grabbing the Instructor field from CourseInformation and breaking up the names and inserting them into my instructors table as follows..
Insert into Instructors(InstructorName, LastName, FirstName)
(Select Distinct
ltrim(SUBSTRING(Instructor,CHARINDEX(' ',Instructor)+1,len(Instructor)))+', '+
SUBSTRING(Instructor,1,CHARINDEX(' ',Instructor)-1),
ltrim(SUBSTRING(Instructor,CHARINDEX(' ',Instructor)+1,len(Instructor))) as LName,
SUBSTRING(Instructor,1,CHARINDEX(' ',Instructor)-1) as FNamefrom CourseInformation
where NOT EXISTS(Select * from instructors where LastName = LName and FirstName = FName)
AND Instructor is not null)

Only problem is, I cant get the where not exists clause to work right(of course that wont work what i have cuz the LName and FName columns dont exist, i just did that for demo purposes). I dont want duplicate instructors in there..how can i accomplish this..is there a better way to rewrite my query? Any help is appreciated.

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Feb 7, 2008

HI All,Which is best among the two 1) NOT IN or 2) NOT EXISTS .If the query is Select col1 from tab1 where col2 NOT IN (Select col 3 from tab2 where cl3=0) OR Select col1 from tab1 where col2 NOT EXISTS (Select col 3 from tab2 where cl3=0)

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Oct 12, 2001

Hi,

I have a question on the if not exists. Can you do something like this? If request not exists in table one then insert values into table two?

Thank you in advance,
Anne

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Jul 15, 2004

Hi,
Is there any way to check whether a column is there in the table, if it is there i need to drop it through script.

i'm looking for the script, something like this..

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GO

In the same way i need to check for a column and drop it through script.
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Thanks in advance.

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Jun 15, 2007

hi guys! is there anyway to retrieve the row from the result of EXISTS function aside from using the code below?

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BEGIN
select * from rcps_useraccount where User_login = 'daimous'
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May 16, 2008

Im having a problem with the following can anyone spot how i can fix it? I dont think it likes the begin statement but without it, it has a declare issue.

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FROM snapevent.INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE='BASE TABLE'
AND TABLE_NAME='FastEp_Snap_OD_Acc' + preports.dbo.f_filedate(getdate())
begin
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--print @CMD
exec (@CMD)
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Jun 20, 2008

Hi

Please help me

I have to create a SP.

The secenario is that,
A application calls the SP with a parameter(login), and a string of datas ( Acctid level1 level2; Acctid level1 level2; .......)

UserID AcctID Level1 level2
test testee N Y

the SP have to get the first string of data and check if the Acctid exists or not. If yes then update else insert.Then get then the second string of data and check if the Acctid exists or not. If yes then update else insert.

After checking all the strings ,
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Feb 18, 2006

I'm trying to perform an insert query on a table, but I also want to check to see if the record exists already in the table. It should be fairly simple, but I'm having a time of it. Should be something like:

select * from users u
inner join miamiherald m
on u.emailaddress = m.advertiseremail
where not u.emailaddress not exists <<< (???)

If it does exist, I then want to retrieve two columns from it. HELP!!

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May 28, 2007

Hi,

The following works in SQL 2005 but NOT SQL 2005 Compact Edition:

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ELSE
INSERT INTO Court2 (BookingDate,T1100) VALUES ('2007-05-28',52)

In CE I get the following error:

There was an error parsing the query. [ Token line number = 1,Token line offset = 1,Token in error = IF ]

I can't find where the problem is - can someone help.

Thanks,

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Dec 6, 2007

Dear all,
i am trying to improve the performance of stored procedures and functions in that in key word is there i have to replace with exists.which one will give better performance.

Thanks&Regards,

Msrs

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I'm trying to search my table for a url, and if it in the table, increment the number of hits of the url. Here's my code:

tblLinks
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URL | NumOfHits
-----------------------

ALTER PROCEDURE sproc_UpdateLink

(
@url varchar
)

AS

IF EXISTS(SELECT LinkURL
FROM tblLinks
WHERE @url = LinkURL)
BEGIN
UPDATE tblLinks
SET NumOfHits = NumOfHits + 1
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RETURN

I've also tried:

ALTER PROCEDURE sproc_UpdateLink

(
@url varchar
)

AS

IF (SELECT LinkURL
FROM tblLinks
WHERE @url = LinkURL) IS NOT NULL
BEGIN
UPDATE tblLinks
SET NumOfHits = NumOfHits + 1
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RETURN

but that didn't work either.

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There's an error in this SQL statement somewhere, but I can't seem to find it. Here's what I'm trying to do:

I have a list of states, and each state is assigned an ID
For each state, I have some data
Given a state name, find the state's ID
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If the state ID is not in the database, output the data for all states

Here's my tables:

--------------------------
States
--------------------------
ID | Name
--------------------------

--------------------------
Data
--------------------------
StateID | StateData
--------------------------

Here's my SQL:

ALTER PROCEDURE sproc_GetStateData
(
@State varchar
)
AS
DECLARE @StateID int

IF EXISTS(SELECT @StateID = ID FROM States WHERE Name = @State)
BEGIN
SELECT D.StateData
FROM Data AS D INNER JOIN States AS S
ON D.StateID = S.ID
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ELSE
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FROM Data AS D INNER JOIN States AS S
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NULL ,[After] [int] NOT NULL ,[Promo] [money] NOT NULL ,[PromoBefore] [money] NOT NULL ,[ItemPrice] [money] NOT NULL ,[PromoAfter] [money] NOT NULL ,[POSItem] [varchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,[UnitNumber] [int] NOT NULL ,[Depleted] [char] (1) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,[AmountTenderTime] [datetime] NULL ,[BusinessDay] [datetime] NOT NULL ,CONSTRAINT [PK_parSalesDetail] PRIMARY KEY CLUSTERED([BusinessDay],[UnitNumber],[parSalesHdrID],[parSalesDetailID]) WITH FILLFACTOR = 70 ON [PRIMARY] ,CONSTRAINT [FK_parSalesDetail_parSalesHdr] FOREIGN KEY([BusinessDay],[UnitNumber],[parSalesHdrID]) REFERENCES [parSalesHdr] ([BusinessDay],[UnitNumber],[parSalesHdrID])) ON [PRIMARY]GO-------------------------------- END CREATE TABLES--------------------------------------------------------------- INSERT INTO TABLES-------------------------------insert into parSalesDetailmodifier values (1,2298561,10917332,2,'ADDG-ON','ADD G-ON',.0000,2,'2003-12-01')insert into 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Oct 31, 2007

Hi,
I'm having problems with this T-SQL:
Sorry if this is obvious, I'm very new to this...

Just trying to return the ID if the row exists and if not just return 0.
What would I need to turn this into a stored procedure too?

Code Block

declare @Return int

if exists(select id from Computer where Computer_name = 'MYCOMPUTER')
begin
select @Return = id
PRINT @Return
end
else
begin
select @Return = 0
PRINT @Return
end

I'm getting this error....

Msg 207, Level 16, State 1, Line 5Invalid column name 'id'.Msg 207, Level 16, State 1, Line 10Invalid column name 'id'.

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Mar 10, 2008

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SELECT *
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Mar 25, 2008

Hi all,

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thanks,

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Aug 30, 2006

Well, finally I lost one day to find a solution for a simple problem. I
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My last question for today:

Why does my sql query return the error: Only one expression can be specified in the select list when the subquery is not introduced with EXISTS

The Query:

SELECT
Configurations.AlarmId, Configurations.Mode, Configurations.Activated,
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(SELECT ConfigurationId, Setpoint1, Alarm

FROM
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AS Expr1
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Controllers ON Configurations.ConfigurationId =
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Tanques ON Controllers.ControllerId = Tanques.ControllerId
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Thanks for every hint!!

P.D.: The ExtendedValues Function:

CREATE FUNCTION dbo.ExtendedValues
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Thanks! losssoc ALTER PROCEDURE dbo.CaseDataInsert

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Code:

Table:PR
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123-456 1000 01
123-456 1000 02
123-456 2000 02
567-890 2000 01
567-890 2000 02

Table:PR_Template
WBS2 WBS3
1000 00
1000 01
1000 02
2000 00
2000 01
2000 02

After Insert I should have:

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123-456 1000 00
123-456 1000 01
123-456 1000 02
123-456 2000 00
123-456 2000 01
123-456 2000 02
567-890 1000 00
567-890 1000 01
567-890 1000 02
567-890 2000 00
567-890 2000 01
567-890 2000 02

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What I have now will find the values that need to be inserted for a particular project but I don't know how to go through each project and perform the insert:

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Thank You

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Hello all,

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IF NOT EXISTS
(select mobile_number
FROM tblCustomer
WHERE mobile_number = 'nParam'
AND op_id = 'opParam'
)
BEGIN
INSERT INTO tblCustomer (
mobile_number, op_id
) VALUES (
'nParam',
'opParam'
)
END

Many thanks

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If Exists Column ?

Nov 30, 2005

Hello

How do you check if a column exist ?

for a table :

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[myTable]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[myTable]
GO

but I dont find it for a column

Thank you

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