Help Understanding This Line Of Code

Aug 16, 2007

case @namesflag when 3 then 1
else case @namesflag when 2 then names.new else names.old
end
end=1

I understand what it is doing for the second part when @namesflag=2
, but what does end=1 mean
Can somebody please explain it to me.
Thanks

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Understanding Microsoft Code For Index Performance...

Sep 25, 2007



Hello,

I found this code in a Microsoft document about index perfromance in SQL 2005. Can some one explain what iss returned by this statement, in relation to what I should do with this data to create/improve indexes? I am not sure based on the results what the columns mean as far as what needs to be done to indexes. What is the equality_columns, included_columns, statement, etc information? Do I make an index for the included_columns? Any help would be appreciated.

Here is the code:
-- Potentially Useful Indexes
select d.*
, s.avg_total_user_cost
, s.avg_user_impact
, s.last_user_seek
,s.unique_compiles
from sys.dm_db_missing_index_group_stats s
,sys.dm_db_missing_index_groups g
,sys.dm_db_missing_index_details d
where s.group_handle = g.index_group_handle
and d.index_handle = g.index_handle
order by s.avg_user_impact desc
go
--- suggested index columns and usage
declare @handle int

select @handle = d.index_handle
from sys.dm_db_missing_index_group_stats s
,sys.dm_db_missing_index_groups g
,sys.dm_db_missing_index_details d
where s.group_handle = g.index_group_handle
and d.index_handle = g.index_handle

select *
from sys.dm_db_missing_index_columns(@handle)
order by column_id

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Feb 23, 2006

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Jun 16, 2006

Hi,
 
I have a problem with the <asp:SqlDataSource.  The thing that I try to do is to create a SQL  statement.  I am not sure if this can be done or not ( just started asp.net).
 
Something like this:
 
<%
    Dim Test1 As String
    Dim Test2 As String
    Dim Test3 As String
    Dim Test4 As String
   
    Test1 = Request("xmbr")
    Test2 = Request("xSEL")
    Test3 = Request("xpro")
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%> 
 
 
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:FinGateConnectionString %>" SelectCommand="<%= Test4%>">
 
 
The problem is that is giving me an error that I can’t figure out.
 
-------------------------------------------------
 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Line 1: Incorrect syntax near '<'.Source Error:





An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
 -------------------------------------------------
 
Thanks.
 
Nbdg_28

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Hi Guys,

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When I take the code inside the stored proc and convert it to inline code (change the parameter declarations to declare statements and procedure call parameters to set statements) and request an execution plan, the runtime is 10 seconds. The results returned are identical.

Comparing the execution plans shows the difference to lie in the SP using one index (returns 100m rows) and the inline code using another (2.5k rows). Apart from this index and the cost for some elements changing by a couple of percentage points the execution plans look very similar.

I've held off pasting the table schema and stored proc in here due to size.

One thing I'd hoped would help, but which didn't make an appreciable change, was to call the stored proc 'with recompile' in case the issue was an old execution plan.

Any suggestions how to stop the query planner making this 'bad' choice? Even some clue as to the source of the difference between the two functionally identical pieces of code might help.

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What would happen if I change one the False value near the end of the code to True?

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Any better way to query SQL 2012 to display the code of a stored proc to a single line. I'm trying to write a script to insert the contents of the procs between my devestprod environments. So people can query a single table for any proc that is different between environments. At the moment I am using the syscomments view and the text column but the problem here is if you get a lengthy proc it cuts it up into multiple rows.

I can get around it by converting the text to a varchar(max) and outer joining the query, but as you can see by my code below I have to try and guess what the maximum number of rows I'm going to get back for my largest proc. If someone adds a new one that returns 8 rows I'm going to miss it with this query.

Select col1.[type],col1.[name],convert(varchar(max),col1.text) + isnull(convert(varchar(max),col2.Text),'')
+ isnull(convert(varchar(max),col3.Text),'')
+ isnull(convert(varchar(max),col4.Text),'')
+ isnull(convert(varchar(max),col5.Text),'')
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+ isnull(convert(varchar(max),col7.Text),'')

[Code] .....

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Feb 27, 2007

Hi,
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for example:

original fixed-length file (exported from SSIS)
line NO DATA
1 AA123456 50 60
2 BB123456 30 40
3 CC123456 80 90
4 <-- with line feed/carriage return in the last line

The file format that AP request. The file only has 3 records, so it should end in the third line.
line NO DATA
1 AA123456 50 60
2 BB123456 30 40
3 CC123456 80 90

Should I use script component to do it ? I am new for VB . Anyone would help me ?

Thank you all.

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Thanks in advance!

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Hi,

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Is this a bug, or am i missing something obvious settings-wise?

Cheers,

M

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Jan 19, 2005

Hi,

The following SQL is lifted from one of the Reporting Services / Adventureworks2000 sample reports. I'm a little slow / baffled on how the inner joins are working? Specifically the Inner Join Locale and Inner Join ProductModel. I'm used to seeing Inner Join SomTable On Something = Somthing but how these joins are working is lost on me. Can someone give a quick overview (or point me to a reference) so I can better understand.

Thanks!


SELECT ProductSubCategory.Name AS ProdSubCat, ProductModel.Name AS ProdModel, ProductCategory.Name AS ProdCat, ProductDescription.Description,
ProductPhoto.LargePhoto, Product.Name AS ProdName, Product.ProductNumber, Product.Color, Product.Size, Product.Weight, Product.DealerPrice,
Product.Style, Product.Class, Product.ListPrice
FROM ProductSubCategory
INNER JOIN Locale
INNER JOIN ProductDescriptionXLocale ON Locale.LocaleID = ProductDescriptionXLocale.LocaleID
INNER JOIN ProductDescription ON ProductDescriptionXLocale.ProductDescriptionID = ProductDescription.ProductDescriptionID
INNER JOIN ProductModel
INNER JOIN Product ON ProductModel.ProductModelID = Product.ProductModelID
INNER JOIN ProductModelXProductDescriptionXLocale ON ProductModel.ProductModelID = ProductModelXProductDescriptionXLocale.ProductModelID
ON ProductDescriptionXLocale.LocaleID = ProductModelXProductDescriptionXLocale.LocaleID AND
ProductDescriptionXLocale.ProductDescriptionID = ProductModelXProductDescriptionXLocale.ProductDescriptionID
ON ProductSubCategory.ProductSubCategoryID = Product.ProductSubCategoryID
INNER JOIN ProductCategory ON ProductSubCategory.ProductCategoryID = ProductCategory.ProductCategoryID
LEFT OUTER JOIN ProductPhoto ON Product.ProductPhotoID = ProductPhoto.ProductPhotoID
WHERE (Locale.LocaleID = 'EN')




Shawn

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Dec 28, 2007

  HiIt's my stored procedure 1 CREATE PROCEDURE singleSearch2
2 @SQ nvarchar(30),
3 @pType nvarchar(11),
4 @pCol nvarchar(11)
5 AS
6 BEGIN
7 DECLARE @SQL NVarChar(1000)
8 SELECT @SQL='SELECT *,'
9 SELECT @SQL=@SQL+' CASE RTRIM(LTRIM(op))'
10 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'e'+CHAR(39)+' THEN '+CHAR(39)+'اجاره'+ CHAR(39)
11 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'r'+CHAR(39)+' THEN '+CHAR(39)+'رهن'+CHAR(39)
12 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'f'+ CHAR(39)+' THEN '+ CHAR(39) +' Ù?روش '+CHAR(39)
13 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'e r'+CHAR(39)+' THEN '+CHAR(39)+ 'اجاره - رهن '+CHAR(39)
14 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'e f'+CHAR(39)+' THEN '+CHAR(39)+'اجاره - Ù?روش '+CHAR(39)
15 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'r f'+CHAR(39)+' THEN '+CHAR(39)+' رهن - Ù?روش '+CHAR(39)
16 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'e r f'+CHAR(39)+' THEN '+CHAR(39)+'اجاره - رهن - Ù?روش'+CHAR(39)
17 SELECT @SQL=@SQL+' ELSE op END AS xop, CASE LTRIM(RTRIM(type)) '
18 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'z -'+CHAR(39)+' THEN '+CHAR(39)+'زمین'+CHAR(39)
19 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'m -'+CHAR(39)+' THEN '+CHAR(39)+'مسکونی'+CHAR(39)
20 SELECT @SQL=@SQL+' WHEN '+CHAR(39)+'t -'+CHAR(39)+' THEN '+CHAR(39)+'تجاری'+CHAR(39)
21 SELECT @SQL=@SQL+' ELSE [type] END AS [xtype] FROM [data] '
22 SELECT @SQL=@SQL+' WHERE ([type] LIKE %'+CHAR(39)+@pType+CHAR(39)+'%) AND ('+@pCol+' LIKE %'+CHAR(39)+@SQ+CHAR(39)+'%)'
23 Exec (@SQL)
24 END
25 GO
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Jan 16, 2008



Hi

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Apr 18, 2008

My question is about coding style for specifying constraints when creating tables.

Two styles for defining constraints:



In-line:
CREATE TABLE Fruit
(
FruitID INT IDENTITY(1,1)
CONSTRAINT PK_fruit PRIMARY KEY CLUSTERED,
FruitName NVARCHAR(50),
FruitTypeID INT
CONSTRAINT FK_fruit_fruit_types FOREIGN KEY
REFERENCES FruitTypes (FruitTypeID) ON UPDATE CASCADE,
DateCreated DATETIME DEFAULT GETDATE()
)
Out-of-line:
CREATE TABLE Fruit
(
FruitID INT,
FruitName NVARCHAR(50),
FruitTypeID INT,
DateCreated DATETIME
)

ALTER TABLE Fruit ALTER COLUMN FruitID INT NOT NULL

ALTER TABLE Fruit ADD
CONSTRAINT PK_fruit PRIMARY KEY CLUSTERED (FruitID),
CONSTRAINT FK_fruit_fruit_types FOREIGN KEY (FruitTypeID)
REFERENCES FruitTypes (FruitTypeID),
CONSTRAINT DF_fruit_date_created DEFAULT
GETDATE() FOR DateCreated

Which style do you prefer and why?

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May 17, 2007

I'm trying to get the following poll working:http://www.codeproject.com/useritems/Site_Poll_Control.aspIt looks like it's exactly what I was looking for, but it doesn't come with much in the way of instructions.  I have the following function: Public Function CastVote(ByVal PollId As Integer, ByVal Answer As Integer, ByVal MemberId As Integer) As Boolean        Dim cmd As New SqlCommand("InsertPollResult", New SqlConnection(Connection))        With cmd.Parameters            .AddWithValue("@PollId", PollId)            .AddWithValue("@PollChoice", Answer)            .AddWithValue("@MemberId", MemberId)        End With        Return (SqlExecuteInsertSp(cmd) > 0)    End Function This calls SqlExecuteInsertSp(cmd) which is:Public Function SqlExecuteInsertSp(ByVal cmd As SqlCommand) As Integer        Dim i As Integer        cmd.CommandType = CommandType.StoredProcedure        Try            cmd.Connection.Open()            i = cmd.ExecuteNonQuery()        Catch ex As Exception            ErrorMessage = "ProDBObject.SqlExecuteInsertSp(SqlCommand): " & ex.Message.ToString        Finally            cmd.Connection.Close()        End Try        Return i    End Function I can't figure out what this is doing.  The best I can figure is it determines if we have a good connection.  Is this right?  In my code CastVote keeps returning false, and I don't know why.   The answer seems to be in the i = cmd.ExecuteNonQuery() line, but I can't figure out what that line is supposed to be doing.Diane  

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Sep 4, 2006

Hi Guys,
I have written quite a big stored procedure which creates a temporary table (multi-session) and updates it. All the statements are encapsulated in a single transaction which is explicitly declared in the code. What happens is that a lock is being put by the server on that table (of type Sch-M) in order thus preventing any type of operations on it (including simple select)

Now, I want to be able read that table from within another transaction. Why is that I cannot use a table hint NOLOCK in the select statement?

Here is some code which reproduces my problem.

Query A:



SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;

BEGIN TRAN TR_DEMO;

CREATE TABLE ##TBL1(
Oidx int not null primary key identity(1,1),
Name nvarchar(30) not null,
Type char(1) not null
);


INSERT ##TBL1 (Name,Type) VALUES ('Car','M');

WAITFOR DELAY '00:00:10';

INSERT ##TBL1 (Name,Type) VALUES ('Plane','M');

WAITFOR DELAY '00:00:10';

INSERT ##TBL1 (Name,Type) VALUES('Submarine','M');

WAITFOR DELAY '00:00:10';

DELETE FROM ##TBL1;

DROP TABLE ##TBL1;

COMMIT TRAN TR_DEMO;



Query B:

SELECT TOP 1 * FROM ##TBL1 (NOLOCK) ORDER BY oidx DESC;

Launch query A and then execute query B.

Thanks a lot for your help.

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Nov 3, 2004

My question is in what situations @@ERROR will be set...

I like to do some logic when some error is occured in a particular statement....

the doc. says the @@ERROR value will be set if an error occurs in a statement, and the control will move to the next statement without exiting(???) the procedure and @@ERROR value can be used in that statement.

but when i execute the below procedure, the execution is terminated ( when the error occurs) without moving to the next statement. please help me to understand the SQL Server's @@ERROR and the situations when it will be set....

-----------------------------------------------------------------------
CREATE PROCEDURE VALUE_ERROR_TEST
AS
BEGIN
DECLARE @adv_error INT
DECLARE @errno INT
DECLARE @var int
SELECT @var = '101 a'
SELECT @errno = @@ERROR
print @errno
END
go
-----------------------------------------------------------------------
procedure get successfully compiled. when executed it says,

Server: Msg 245, Level 16, State 1, Procedure VALUE_ERROR_TEST, Line 10
Syntax error converting the varchar value '101 a' to a column of data type int.


Jake

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Dec 4, 2007

I am using SQL Server Express and Visual Studio 2005. I am new to batches and am trying to understand how they work. I am trying to write a query that creates an assembly and the functions that are contained in it. Here is my query:

USE ProductsDRM
GO

IF NOT EXISTS (SELECT 'True' FROM sys.assemblies WHERE name = 'ComputedColumnFunctions')
BEGIN
CREATE ASSEMBLY ComputedColumnFunctions
FROM 'C:WebsitesAssemblyTestStoredFunctionsStoredFunctionsinStoredFunctions.dll'
GO

CREATE FUNCTION fImageFileName
(
@ProductID int,
@ImageSizeCode nvarchar(4000)
)
RETURNS nvarchar(4000)
AS EXTERNAL NAME [ComputedColumnFunctions].[StoredFunctions.UserDefinedFunctions].ImageFileName
GO

CREATE FUNCTION fTestInt
(
@ProductID int
)
RETURNS int
AS EXTERNAL NAME [ComputedColumnFunctions].[StoredFunctions.UserDefinedFunctions].TestInt
GO

CREATE FUNCTION fTestInt2
(
@TestInt int
)
RETURNS int
AS EXTERNAL NAME [ComputedColumnFunctions].[StoredFunctions.UserDefinedFunctions].TestInt2
END
ELSE
BEGIN
PRINT 'The assembly named "ComputedColumnFunctions" already exists. No new assembly was created.'
END

GO

I read in a book about SQL Server 2005 about including a test for whether the object (such as assembly in this case) exists before trying to create it. If I only include the CREATE ASSEMBLY statement and the FROM line below it and delete the next GO down through the last CREATE FUNCTION (just before the END ELSE), it works fine. If I leave it as is, I get a runtime error on the GO line just after the CREATE ASSEMBLY statement. What am I doing wrong?

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However, once I am finished writing and testing my projects, I move them to SQL Server, using SAVE COPY AS... (for now, I only using one server for both development and production)

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So, in IsRemotePathVariable, I selected "False". When I did this, I was expecting to be able to navigate the various FTP Sites I have set up on my destination computer. However, when I click on RemotePath, I only see "/" (Root). Was I wrong to expect to see the FPT Sites here? What am I doing wrong?

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Thanks,

Kyle

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Hello List,

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Questions:

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Many thanks.

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