Updating Hits Without Looping

Sep 6, 2007

Hi.

This is my first attempt at a using stored procedures and I'm a bit confused.

I'm trying to follow as many best practices as I can to improve speed, security and scalability. However, I can't find a solution to what I think should be a simple problem.

I have a search page where users enter the criteria of properties they are interested in (bedrooms, price etc...). That takes them to a results page where the properties are displayed.

The problem is that I want the amount of times each property has been shown on the results page to be tracked so the property owner gets statistics.

The property details are all held in a single table along with the amount of times each property has be shown:

Table Name:   zk_Property_USA





ID
INT


User_ID
INT


Property_Type
TINYINT


Market_Status
TINYINT


Price
INT


Bedrooms
TINYINT


Address_State
VARCHAR


Address_Location
VARCHAR


Property_Description
VARCHAR


Searched
INT
0

Contacted
INT
0

I'm trying to find a way to SELECT all the property details to be returned to my results page and UPDATE the "Searched" field by 1 without re-scanning the table for the UPDATE.

Is there a way to update "Searched" at the time when the record is chosen to be a result? I am using SQL Server 2005 and Visual Basic ASP.NET 2.0.

Many Thanks

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Looping Thru A Table And Updating The Contents

Nov 8, 2007

Hello, Its hard trying to explain this.
I have 3 tables
Table 1 is where the users are stored, each user has a username and a userrank
Table 2 is where the points that decides the userrank are stored
Table 3 contains the available userranks like this
 
Table 1 (user_list) looks briefly like this:username nvarchar(20),userrank int, -- Reference to Table3 id... alot more fields
Table 2 (settings_profile) looks like this:username nvarchar(20),total_active_points int,... some more fields
Table 3 (data_ranks) looks like this:id int primary key auto inc,rankname nvarchar(20),min_pts int,max_pts int
 
Points get added to table 2 whenever they do something that generates points on the site. Points also get withdrawn every 7 days, so a user can only collect points for 7 days, on the 8th day, all points he earned on the 1st day is reduced from the current points with this code:
WHILE (SELECT @username = username, @id = id, @temp1 = ap_sentmails, @temp2 = ap_createdthreads, @temp3 = ap_createdanswers, @temp4 = ap_signguestbook, @temp5 = ap_blogcomment, @temp6 = ap_createblogentry, @temp7 = ap_profilefirsttime, @temp8 = ap_profilephoto, @temp9 = ap_activateguestbook, @temp10 = ap_addnewfriend, @temp11 = ap_superguruvote, @temp12 = ap_forumtopicvote, @temp13 = ap_labervote, @temp14 = ap_funstuffitemvote, @temp15 = ap_movievote, @temp16 = ap_actorvote, @temp17 = ap_money_new WHERE (created < Dateadd(dd, -7, @todaysdate))BEGINSET @sum = 0SET @sum = @temp1 + @temp2 + @temp3 + @temp4 + @temp5 + @temp6 + @temp7 + @temp8 + @temp9 + @temp10 + @temp11 + @temp12 + @temp13 + @temp14 + @temp15 + @temp16 + @temp17UPDATE settings_profile SET total_active_points = total_active_points - @sum WHERE (username = @username)DELETE FROM konto_daylist WHERE (id = @id)END
Now my question is this, i want to loop thru the table A, collect all usernames inside of it, then run it against table b and table c to determine the current rank of the user.Something like this...
DECLARE @username nvarchar(20)DECLARE @pts int, @rank int
...something that starts a loop thru table A (user_list) and get the username into @username...
SELECT @pts = total_active_points  FROM settings_profile WHERE (username = @username)-- Determine the rank here, by compairing the points the user have against the pointstabel in table data_ranksSELECT @rank = id FROM data_ranks WHERE (pts_min => @pts AND pts_max < @pts)UPDATE user_list SET rank = @rank WHERE (username = @username)
...next persion in the loop...
This SP runs once a day and will first reduce the points from 8days ago, then it will run thru all the users and determine their new rank...
But how do i loop thru all the users? with a cursor?

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Jun 3, 2008

Hello,

I am a little new at T-SQL. and I could use a suggestion on the best way to accomplish this task. I have an application where I must loop through a table in Microsoft SQL Server 2005, find the records that match and break them up into groups where the value of the Thickness field is in groups of ( <=8).

Lets say I have 100 records and the table contains sacks marked A, B, C, and D. Within Sack A is 6 records. Each of the 6 records has a thickness column with a value between 0.5 to 1.0 (my example shows 2) I have a column called bundle that I must update to show a 1 for the first group of (<=8) inches thick a 2 for the second group (<=8) inches thick and so on. Then repeat the process for sacks B, C and D.

The table itself has the following
Order Number |Zipcode |Sack(A, B, C,or D)| Thickness |Bundle|
1 |19809 |A | 2 |NULL |
2 |19809 |A | 2 |NULL
3 |19809 |A | 2 |NULL
4 |19809 |A | 2 |NULL
5 |19809 |A | 2 |NULL
6 |19809 |A | 2 |NULL |
7 |19721 |B | 4 |NULL |
8 |19721 |B | 3 |NULL |
9 |19721 |B | 2 |NULL |
10 |19721 |B | 5 |NULL |
11 |19721 |B | 2 |NULL |
12 |19721 |B | 2 |NULL |

What I need to do is sum the thickness until it gets to less than 8 and update bundle with a 1. The result would be 4 records and the table would then look like this:

Order Number |Zipcode | Sack(A, B, C,or D)| Thickness |Bundle|
1 |19809 |A | 2 |1 |
2 |19809 |A | 2 |1
3 |19809 |A | 2 |1
4 |19809 |A | 2 |1
5 |19809 |A | 2 |NULL
6 |19809 |A | 2 |NULL |
7 |19721 |B | 4 |NULL |
8 |19721 |B | 3 |NULL |
9 |19721 |B | 2 |NULL |
10 |19721 |B | 5 |NULL |
11 |19721 |B | 2 |NULL |
12 |19721 |B | 2 |NULL |

Notice there are two records that are not bundles for sack A. I need to place them in a separate bundle called 2. The result will be as follows
Order Number |Zipcode | Sack(A, B, C,or D)| Thickness |Bundle|
1 |19809 |A | 2 |1 |
2 |19809 |A | 2 |1
3 |19809 |A | 2 |1
4 |19809 |A | 2 |1
5 |19809 |A | 2 |2
6 |19809 |A | 2 |2 |
7 |19721 |B | 4 |NULL|
8 |19721 |B | 3 |NULL
9 |19721 |B | 2 |NULL
10 |19721 |B | 5 |NULL |
11 |19721 |B | 2 |NULL |
12 |19721 |B | 2 |NULL |

Now Sack A is complete so I must move on to Sack B. The first two records total to 7 and adding another record would move the thickness past 8 so I must update the bundle for only the first two records with a 1. The next two total to seven also and the following 2 total to four. We must set those bundles to 1, 2, 3 as follows

1 |19809 |A | 2 |1 |
2 |19809 |A | 2 |1
3 |19809 |A | 2 |1
4 |19809 |A | 2 |1
5 |19809 |A | 2 |2
6 |19809 |A | 2 |2 |
7 |19721 |B | 4 |1 |
8 |19721 |B | 3 |1 |
9 |19721 |B | 2 |2 |
10 |19721 |B | 5 |2 |
11 |19721 |B | 2 |3 |
12 |19721 |B | 2 |3|

These scenarios just keep repeating until the last record

Thank you for any help you can give me

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Oct 1, 2004

The process of adding a column with DEFAULT (0) to a table that has 15million records takes a despicable amount of time (too much time) and the transaction log of the database grew to an unacceptable size. I would like to accomplish the same task using this procedure:

·Add the column to the table with null value.
·Loop through the table (500000 records at a time) and SET the value in the newly added column to 0.
·Issue a commit statement after each batch
·Issue a checkpoint statement after each batch.
·Alter the table and SET the column to NOT Null DEFAULT (0)


Here is my Sample script


ALTER TABLE EMPLOYEE ADD EZEVALUE NUMERIC (9,6) NULL
Go

Loop
UPDATE EMPLOYEE SET EZEVALUE = 0
Commit Tan
CHECKPOINT
END (Repeat the loop until the rows in EMPLOYEE have the value 0)

Go

ALTER TABLE EMPLOYEE ALTER COLUMN EZEVALUE NUMERIC (9,6) NOT NULL DEFAULT (0)


My problem is with the loop section of this script. How do I structure the loop section of this script to loop through the employee table and update the EZEVALUE column 500000 rows at a time, issue a Commit Tran and a CHECKPOINT statement until the whole table has been updated. Does anyone out there know how to accomplish this task? Any information would be greatly appreciated.


Thanks in advance

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Apr 29, 2005

Hello!

is it possible to have the count(*) to display 0 when there is no matching hits for that n_id?

my query looks like this but only displays the n_id and it's respective count(*) when count(*) is more than 0...

select n_id, count(*) from tblTable
where nSomething > nSomethingElse AND nSomething IS NOT NULL
group by n_id

any idaes?

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Aug 24, 2006

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Jan 22, 2008

Using MSSQL (pre 2005):
I have a Link table:
int id (primary key/identity)
varchar(50) linkName
varchar(255) linkHref
//some other stuff
and my Hits table:
int id (primary key/identity)
int linkId (foreign key to Link)
datetime dateCreated
//some other stuff
Hits gets an insert whenever a link is clicked.  (All this works just fine)
I'm trying to create a report that shows each link by its name and href, a counter and the last date each link was visited.  What I currently have is an accurate listing for those that have been clicked on, but it does not show anything for links that haven't been clicked on.  Any suggestions as to how I can modify the following SQL to return "0" and "never" (or DBNULL) if no entries are found in Hits that have the same id?  Or do I have to do this in a couple queries?
SELECT COUNT(h.id) as counter, MAX(h.dateCreated) as lastVisited,
l.id as id, l.linkName as linkName, l.linkHref as linkHref
FROM Link as l INNER JOIN Hits as h ON l.id=h.moduleId
GROUP BY l.linkName, l.id, l.linkHref
 

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Apr 20, 2006

Hello,
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is that true? what do i have to do to get this?
greetings and thx
cpt.oneeye
 

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Feb 7, 2008

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Thoughts?

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thanks beforehands.

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TABLES
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Feb 4, 2008

Hello friends

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Following fields are used in customerletter_master – CID (autogen number), letterno(primary key),consignee, consignor, letterstatus1, letterstatus2, letterstatus3, POD, and some more fields. When letter passes to different stages letterstatus1 is filled to yes and then letterstatus2 and letterstatus3 are filled according to passage of letter.

And at same time many user can accesses the customerletter_master table to search any letter according to letterno. Therefore customerletter_master is used to enter data and to search data at same time and there can be more than 200-400 users doing add and search records to and from customerletter_master

how should i design this table. What should i use to enter and search record and minimize the table hits made by the user at same time. Should i use store procedures or any other method to add and search record. Plz help me out by giving some example.

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So which one is better, 1 stored procedure with 12 parameters or 3 stored procedures with 4 parameters each called one after the other.

Thanks

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Doing what I need to do, deleting the max, then finding the new max and looping until no records exist.

I know there has to be a better way. The table I am working with is millions of records.
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May 23, 2008

Hello clever people
I have a table that holds duplicates that I want to change into a table that has no duplicates. The current table is this
name
compound_id integer
name varchar(150)
name_type integer

This table stores chemical names. There is no primary key in the table so there are multiple compound_id's. I think the original idea was to have four name-types
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2 = a description of the chemical
3 = a synonym of the chemical
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I have created a new table called compound_name with this structure

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compound_desc varchar(250)
compound_synonym varchar(150)
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compound_trade_nme varchar(50)

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select
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(df.totalspace - fs.freespace) "Used MB",
fs.freespace "Free MB",
df.totalspace "Total MB",
round(100 * (fs.freespace / df.totalspace)) "Pct. Free"
from
dba_tablespaces ts,
(select tablespace_name,
round(sum(bytes) / 1048576) TotalSpace
from dba_data_files
group by tablespace_name) df,
(select tablespace_name,
round(sum(bytes) / 1048576) FreeSpace
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group by tablespace_name) fs
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ts.tablespace_name = fs.tablespace_name
and
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;

I know this question may have a very easy solution, but I have no idea how to solve it.

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Mar 21, 2007

hi guys,

I have a table like this,
S D C


Bi Ar Ar
Bi Ar Ch
Bi Ar Ma
Bi Au Ar
Bi Au Ch
Bi Au Ma
As Ar Ar
As Ar Ch
As Ar Ma
As Au Ar
As Au Ch
As Au Ma
As Au Ma


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Hi guys,

Can anybody tell me how to do looping in SQL?

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Hi All,
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The rules process will fire when the details have been submitted to the database.
Table containg rules would contain something like:
ID, RuleSQL
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3 Etc...
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Sep 14, 2004

Hoping for a little help... I'm attemting to call a stored proc, pass parameters, and display the data 1 record at a time. I need to be able to show the data in a series of lables or text boxes. So the user will see one record, pushed into the lables, click a button and go to the next record...so on and so forth.

I think I have the code to get the data correct, it's the displaying data in lables and looping through the recordset the has me clueless.


Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
If Not Page.IsPostBack Then ' IF This is the first page load
Dim UserID As String = Request.QueryString("UserID")
' parameter for stored procedure
Dim RoleID As String = Request.QueryString("RoleID")


Dim DS As DataSet
Dim MyConnection As SqlConnection
Dim MyCommand As SqlDataAdapter

MyConnection = New SqlConnection(System.Configuration.ConfigurationSettings.AppSettings("connectionString"))
MyCommand = New SqlDataAdapter("getdirective", MyConnection)
MyCommand.SelectCommand.CommandType = CommandType.StoredProcedure
MyCommand.SelectCommand.Parameters.Add(New SqlParameter("@roleID", SqlDbType.NVarChar)).Value = RoleID

Try
DS = New DataSet
MyCommand.Fill(DS)

'Display data in a series of lables or highly formated datagrid

Catch ex As Exception
Response.Write("<font color=red>Error: " & ex.Message & "</font>")

End Try


Else 'IF the page is being reloaded


End If


End Sub


Private Sub cmdAck_Click(...) Handles cmdAck.Click
'This need to loop through the records


End Sub



Thanks for any help!!!

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SELECT item_no
FROM Items

BEGIN

SELECT SUM(sales) AS Total_Sales, SUM(qty) AS Total_Qty
WHERE item_no=@item_no

UPDATE Items
SET Sales=@Total_Sales,
Qty=@Total_Qty
WHERE item_no=@item_no

END

I've tried somewhat successfully to use cursors to create my loop query, but I cannot seem to get the SELECT and UPDATE correct in the loop itself. Can anyone steer me in the right direction (or better yet, provide a solution)?

Thanks for the help,
Chris

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Aug 30, 1999

What I have to do is loop through a table with about 900 records, do computations on each record and update a database, can someone help me out.

here is the code that I am using right now on another site with coldfusion but i want to convert it all to a stored proc for speed reasons.

<!--- Query the Stores Table --->
<cfquery name="Zip2" datasource="#application.data#" username="#application.username#" password="#application.password#">
exec Stores_GetStoreZipInfo
</cfquery>

<!--- Loop through the STORE table --->
<cfloop query="zip2">
<cfset Lat1 = #zip1.lat#>
<cfset Lg1 = #zip1.long#>
<cfset Lat2 = #zip2.lat#>
<cfset Lg2 = #zip2.long#>

<!--- Do the actual distance calculation between the user's zipcode each store's zipcode --->

<cfset DistLat = 69.1 * (Lat2-Lat1)>
<cfset DistLong = 69.1 * (Lg2-Lg1) * #cos(Lat1 / 57.3)#>
<cfset Dist = ((#abs(DistLat)# * 2) + (#abs(DistLong)# * 2)) * 0.5>

<!--- Update the DISTANCE field on STORE table --->
<cfquery name="UpdateZips" datasource="#application.data#" username="#application.username#" password="#application.password#">
exec Stores_UpdateZipSeachInfo '#Dist#', '#zip2.zipcode#'
</cfquery>
</cfloop>

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Aug 16, 2005

I am not sure if what I wish to do is possible, but I shall ask anyway;

My project examines a database log of all the pages of an online teaching tool. Once the user has completed all the pages they are to be issued a certificate. Users may complete the teaching tool in any order, and the pages are always stored whenever they are acccessed, regardless of certification.
I have created a number of views that extract the data into a list of all the possible completion dates; i.e. where all the pages have been completed within any 12 month period. I need to write a query/view that uses the view to extract the first possible user completion date followed by every completion 12 months after that, then after that etc. to present day.
Can I do this?
Am I making sense ?

A no is acceptable in this case; I know I can do this with multiple queries from withing an application. I'd just rather not.

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