I am trying to find a way to lock rows of data used in a SELECT query from being read by another SELECT query.
I could do a "begin tran - select - update - rollback" sequence but was wondering if there is a cleaner way to do this??
Tried UPDLOCK, ROWLOCK, TABLOCK, HOLDLOCK in multiple variations but none seem to block the select.
Firstly may I say that the sproc I am having problems with and the service that calls it is inherited technical debt from an unsupervised contractor. We are not able to go through a rewriting process at the moment so need to live with this if possible.
Background
We have a service written in c# that is processing packages of xml that contain up to 100 elements of goods consignment data. In amongst that element is an identifier for each consignment. This is nvarchar(22) in our table. I have not observed any IDs that are different in length in the XML element.
The service picks up these packages from MSMQ, extracts the data using XPATH and passes the ID into the SPROC in question. This searches for the ID in one of our tables and returns a bool to the service indicating whether it was found or not. If found then we add a new row to another table. If not found then it ignores and continues processing.
Observations
The service seems to be dealing with a top end of around 10 messages a minute... so a max of about 1000 calls to the SPROC per minute. Multi-threading has been used to process these packages but as I am assured, sprocs are threadsafe. It is completing the calls without issue but intermittently it will return FALSE. For these IDs I am observing that they exist on the table mostly (there are the odd exceptions where they are legitimately missing). e.g Yesterday I was watching the logs and on seeing a message saying that an ID had not been found I checked the database and could see that the ID had been entered a day earlier according to an Entered Timestamp.
So the Sproc...
USE [xxxxxxxxxx]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
[Code]....
So on occasions (about 0.33% of the time) it is failing to get a bit 1 setting in @bFound after the SELECT TOP(1).
The only suggestions I can make have been...
change @pIdentifier nvarchar(25) to nvarchar(22)
Trim any potential blanks from either side of both parts of the identifier comparison
Change the SELECT TOP(1) to an EXISTS
The only other thought is the two way parameter direction in the C# for the result OUTPUT. Not sure why he did it that way or what the purpose is.
I have been unable to replicate this using a test app and our test databases. Has observed selects failing to find even though the data is there, like this before?
Is it possible to return the results of a stored procedure into either a CTE or temp table?
In other words, is it possible to do this:
with someCTE as (
exec someStoredProc
)
or this:
exec someStoredProc into #tempTable
???
I am using MSSQL Server 2008R2 and I am interested in returning rows from a 'financial' table that fall within the current year (each row contains a 'Entered Date'). I am located in Australia so my financial year consists of all entries between the date 01/07/xx to the 30/06/yy.
Perhaps using the datediff() function, or other functions as required to achieve what I need?
I have a UDF with a select * that works fine in one region (DEV) but not another (QC). It's not returning the last 2 columns from the table in QC.I looked at the UDF and it does a fairly simple select:
select a.*
from myTable A
The table is the same in both regions and I did a sp_help on the table to ensure these 2 columns are listed. They are. Also, executing a select * in a query windows does return the final 2 columns from the table in QC. The issue resides in the QC version of the UDF only.
The UDF has already been updated to retrieve all columns by name but I'm curious why this would happen. For some reason I'd just like to know and in case it happens again.
Hi,
Hope you guys won't mind this rather newbie question. I'm writing a simple blog page for my website and have created a SqlDataSource which queries the database for a list of blog post titles (from the web.Blog table) and the number of comments (from the web.BlogComments table). The SqlDataSource control is:
<asp:SqlDataSource ID="sourceBlogArticles" ProviderName="System.Data.SqlClient" connectionString="<%$ ConnectionStrings:myDatabase %>" runat="server" SelectCommand="SELECT gb.blogID, gb.title, gb.description, gb.tags, gb.dateAdded, COUNT(gbc.blogID) AS noOfComments FROM web.Blog gb LEFT OUTER JOIN web.BlogComments gbc ON gb.blogID = gbc.blogID GROUP BY gb.blogID, gb.title, gb.description, gb.tags, gb.dateAdded ORDER BY gb.dateAdded"></asp:SqlDataSource>
This works perfectly well if each blog entry in the web.Blog table has associated comments in the web.BlogComments table. However, if there are no comments yet defined in the web.BlogComments table for that blogID then no row is returned in ASP.Net (as checked with a GridView control or similar linked to the data source to view what I get)
HOWEVER, I think the SELECT command IS correct: if I use the select command as a query in SQL Server Managment Studio Express, I do get the rows returned, with 0 for the number of comments which is what I would expect for that query:
blogID, title, description, tags, dateAdded, noOfComments
1, title 1, description for title 1, tag1, 2007-09-27 06:49:03.810, 32, title 2, description for title 2, tag2, 2007-09-27 06:49:37.513, 03, title 3, description for title3, tag3, 2007-10-02 18:21:30.467, 0
Can anyone help? The result from the SSMSE query is what I want, yet when I use the very same SELECT statement in my SqlDataSource I don't get any rows returned if the BlogComment count is zero (in the above example I get only the first row). Many thanks for any suggestions!
I have a script with a number of different Left Joins. When I run it in Query Analyzer the Left Join works as a normal join and suppresses some rows. However when the same code is used in a stored procedure the correct results are produced when the stored procedure is executed.
Can anyone tell me what is causing this?
SELECT USR.ROLEUSER
,PER.NAME
,EMP.PAYGROUP
,USR.ROLENAME
,OPR.EMPLID
,OPR.OPRDEFNDESC
,OPR.ACCTLOCK
,OPR.ROWSECCLASS
,EMP.JOBCODE
,JCD.DESCR
,EMP.DEPTID
,EMP.DEPTNAME
FROM PSROLEUSER USR
JOIN
PSOPRDEFN OPR
ON
USR.ROLEUSER = OPR.OPRID
LEFT OUTER JOIN
PS_PERSONAL_DATA PER
ON
OPR.EMPLID = PER.EMPLID
LEFT OUTER JOIN
PS_EMPLOYEES EMP
ON
OPR.EMPLID = EMP.EMPLID
LEFT OUTER JOIN
PS_JOBCODE_TBL JCD
ON
JCD.SETID = 'RBLTT'
AND EMP.JOBCODE = JCD.JOBCODE
AND JCD.EFFDT =
(SELECT MAX(EFFDT)
FROM PS_JOBCODE_TBL
WHERE JCD.SETID = SETID
AND JCD.JOBCODE = JOBCODE
AND EFFDT <= GETDATE())
WHERE OPR.ACCTLOCK = 0
AND USR.ROLENAME = 'RBL MANAGER'
AND EMP.PAYGROUP NOT IN ('RBA', 'RMA')
I need some help. I have a function that used to use ADO.NET to return a dataview. Now I'm using linq, and I don't know how to make this work anymore.my original function looked like this: public DataView getIssue() { //do some ADO, return the dataview return ds.Tables["Articles"].DefaultView; } With this I could write Gridview1.dataSource = getIssue();I want to do the same thing with Linq, but I'm running into some trouble:Here's my function now:public DataView getIssue() { var query = from a in db.Articles join i in db.Issues on a.IssueID equals i.IssueID select a; DataView dv = new DataView(); dv = query.asdatatable(); return query; }OK, first off I can't use asdatatable since I am using a join, so I can't make the results of my query a dataview. I can't return the results of my query in this function, something that seemed simple to do in Linq now seems like something that may only be possible in ADO.Thanks for your time
View 5 Replies View RelatedI have a query with a nested query that is used as an in line view. When I run the whole query I keep getting slightly different results each time (10000, 10002, 10001, 9999 etc.), nothing is being changed, no jobs are running on the DB to affect the tables etc.
When I run the inline view query with the nested query, or nested query on its own, it returns same number each time.
What could potentially be the cause of this?
Using SQL Server 2008 R2 Express Edition on local W7 PC
Hello.
I am new at SQL and am using SQL server express edition and im a bit stuck! I am using ASP.NET and C# in my website which is using sql database back end.
String SQLroom = "SELECT DISTINCT RoomName FROM Room INNER JOIN RoomCalendar ON Room.RoomID = RoomCalendar.RoomID WHERE Capacity = '" + reqCapacity + "' " + " AND NOT ('" + newRoomEnd + "' <= roomStartDateTime OR '" + newRoomStart + "' >= roomEndDateTime) AND (OHP = '" + ohpYesNo + "' AND AV = '" + avYesNo + "') ";
This is my SQL string... what it is trying to do is:
find the room
where the capacity is the reqcapacity entered by user
and the startdatetime and enddatetime entered by the user are not present in the table for that room capacity
and then look at whether the user requires OHP or AV facilities, which are stored in the database as either yes or no values.
The problem i am having is with the condition in the sql query... because the user may require an OHP and not AV, but then the room returned "`could" have AV facilities, as it wouldnt make a difference to them if it was there or not, basically, the yes condition has to be satisfied.
Not sure whether i should be using AND, or OR? or a combination.
Any ideas gratefully appreciated....
Sandy
I havea 2 part issue with a query I'm trying to run for a report.
I have an incident report that needs to show results based on dates from the week before. In addition, This report should run every Monday morning, with the exception of a Monday holiday, where in that case, the report will run the next business day. I have an idea to use a case statement, but it doesn't seem to work for me. Any suggestions?
Also,part of the query I have is pulling back the right data, as long as I don’t include parameters. When I do add values to the parameters the query includes all the dates. I need to see either/or - not both. I just want to either see dates without the param values or see only dates that I ask for in a parameter. Does that make sense?
Here’s the query (thanks!):
SELECT incident.incid_id,
incident.incid_short_desc,
incident.incid_received_date_time,
incident.incid_closed_date_time,
security_users.description,
incident.incid_assigned_to,
incident.tagged_delete_flag,
activity_result_master.result_desc,
incident_priority_master.priority_desc,
activities.result_id
FROM activities AS activities INNER JOIN
incident AS incident ON
activities.incid_id = incident.incid_id INNER JOIN
activity_result_master AS activity_result_master ON
activities.result_id =
activity_result_master.result_id
INNER JOIN security_users AS security_users ON incident.incid_assigned_to = security_users.name INNER JOIN
incident_priority_master AS incident_priority_master ON incident.priority_id = incident_priority_master.priority_id
WHERE incident.tagged_delete_flag = 'N' AND
activities.result_id = '6' AND
(incid_received_date_time >= DATEADD (d,-7,GETDATE()) AND
incid_closed_date_time <=DATEADD (d,-3,GETDATE())) OR
CONVERT(varchar,incident.incid_received_date_time,101) >= @StartDate AND CONVERT(varchar,incident.incid_closed_date_time,101) <= @EndDate
ORDER BY incident.incid_assigned_to, incident.incid_id
Hi,I wanted to know if this is possible and if so, how do Ido it. Say, I have a query "SELECT * FROM Table WHEREColumn="some_value". This executes on a very large dataset and I would like to return the results as they queryexecutes rather than wait for the whole query to execute.Basically, I want to get the results as they are preparedby the database. Any way to do this?Regards,San
View 8 Replies View Relatedlinking two tables together to get an end result
find below the code i have used
The first part of the query provides me with the info i need
SELECT sub.*,
case when rm_sales_band = '2M to 4M' then 'Kirsty' else RM end as rm
into #rmtmp
[Code].....
Hello,
I have a query that works in query analyzer; it looks that a certain date is between the start and end date of a certain value. I also have a status field, which can be null, but if provided, provides the appropriate status to filter by.
Again, the query works in QA, but not in the application. I test in SQL by using start date = '1/1/1900', end date = '12/31/9999', and status = null. Results are returned. But, not when the results are done through code. In code, I set the begin date to new DateTime(1900, 1, 1), the end date to DateTime.MaxValue, and the status to a null string. But, no results are returning. Why isn't that mapping over correctly? In the function, it has the two dates as Nullable(Of DateTime), which I provide a date, and the string is getting passed Nothing.
Any ideas? Can't post any code on this one...
Thanks.
Hi,
I want to make SQLTransaction as global and use it checking the State.
But then where there are Only Select queries are going to fire, it will open transaction.
So, Does it locks database/tables when Only Select query comes in SQLTransaction.
If you have another successful way of doing this, Please suggest.
Thanking you.
tats
hi, like, if i need to do delete some items with the id = 10000 then also need to update on the remaining items on the with the same idthen i will need to go through all the records to fetch the items with the same id right? so, is there something that i can use to hold those records so that i can do the delete and update just on those records and don't need to query twice? or is there a way to do that in one go ?thanks in advance!
View 1 Replies View RelatedI have a stored procedure on a SQL Server 2008 database. The stored procedure is very simple, just a SELECT statement. When I run it, it returns 422 rows. However, when I run the SELECT statement from the stored procedure, it returns 467 rows. I've tried this by running both the stored procedure and the SELECT statement in the same SSMS window at the same time, and the behavior is the same. The stored procedure is:
USE [REMS]
GO
/****** Object: StoredProcedure [mobile].[GetAllMobileDeviceUsers] Script Date: 12/04/2014 */
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
[Code] ....
When I do this in the same SSMS window:
exec mobile.GetAllMobileDeviceUsers
SELECT
ee.EmployeeID,
EmployeeName = LastName + ', ' + FirstName
FROM EmployeeInvData ee
--UNION
[Code] ....
I get two result sets. The first is 422 rows; the second is 467 rows. Why?
best way to snapshot results from a query?
View 3 Replies View RelatedNot sure if this is possible, but maybe. I have a table that contains a bunch of logs.
I'm doing something like SELECT * FROM LOGS. The primary key in this table is LogID.
I have another table that contains error messages. Each LogID could have multiple error messages associated with it. To get the error messages.
When I perform my first select query listed above, I would like one of the columns to be populated with ALL the error messages for that particular LogID (SELECT * FROM ERRORS WHERE LogID = MyLogID).
Any thoughts as to how I could accomplish such a daring feat?
Hi,
My Select query returing the one column:
Options
1
2
3
Form this Options column I have to check the Checkbox1, checkbox2, checkbox3 out of total 6 checkboxes in asp.net form. I am getting the Options column from database.
How to store that resultset.
Thanks in advance.
I have four tables: Customer (CustomerId INT, CountyId INT), County (CountyId INT), Search(SearchId INT), and SearchCriteria (SearchCriteriaId INT, SearchId INT, CountyId INT, [others not related to this]).
I want to search Customer based off of the Search record, which could have multiple SearchCriteria records. However, if there aren't any SearchCriteria records with CountyId populated for a given Search, I want it to assume to get all Customer records, regardless of CountyId.
Right now, I'm doing it this way.
DECLARE @SearchId INT = 100
SELECT * FROM Customer WHERE
CountyId IN
(
SELECT CASE WHEN EXISTS(SELECT CountyId FROM SearchCriteria WHERE SearchId = @SearchId)
THEN SearchCriteria.CountyId
[Code] .....
This works; it just seems cludgy. Is there a more elegant way to do this?
I've got a query that returns the data I need. I want to put the query in a stored procedure such that, when the SP runs I get a pipe delimited text file on disk. I don't really want to mess with SSIS, etc. Is there a Q&D way to do this?
View 1 Replies View RelatedHi, not exactly too sure if this can be done but I have a need to run a query which will return a list of values from 1 column. Then I need to iterate this list to produce the resultset for return.
This is implemented as a stored procedure
declare @OwnerIdent varchar(7)
set @OwnerIdent='A12345B'
SELECT table1.val1 FROM table1 INNER JOIN table2
ON table1. Ident = table2.Ident
WHERE table2.Ident = @OwnerIdent
'Now for each result of the above I need to run the below query
SELECT Clients.Name , Clients.Address1 ,
Clients.BPhone, Clients.email
FROM Clients INNER JOIN Growers ON Clients.ClientKey = Growers.ClientKey
WHERE Growers.PIN = @newpin)
'@newpin being the result from first query
Any help appreciated
I have a query that performs a comparison between 2 different databases and returns the results of the comparison. It returns 2 columns. The 1st column is the value of the object being compared, and the 2nd column is a number representing any discrepancies.What I would like to do is use the results from this 1st query in the where clause of another separate query so that this 2nd query will only run for any primary values from the 1st query where a secondary value in the 1st query is not equal to zero.I was thinking of using an "IN" function in the 2nd query to pull data from the 1st column in the 1st query where the 2nd column in the 1st query != 0, but I'm having trouble ironing out the correct syntax, and conceptualizing this optimally.
While I would prefer to only return values from the 1st query where the comparison value != 0 in order to have a concise list to work with, I am having difficulty in that the comparison value is a mathematical calculation of 2 different tables in 2 different databases, and so far I've been forced to include it in the select criteria because the where clause does not accept it.Also, I am not a DBA by trade. I am a system administrator writing SQL code for reporting data from an application I support.
A server I'm working on has a very unique situation, where user tables and production tables reside on the same database. Users update / create tables or populates these tables, so it can't be a table-specific trigger. However, they give a new meaning to "kamikaze pilots" as it's not uncommon for them to "accidentally" update / insert / delete 500,000,000 + records in a single statement. I've tried educating them to use batching, but to no avail, so now I'm forced to stop these statements BEFORE they execute, based on rowcount, as they fill up the database log so quickly that it goes into recovery mode (It has a 200GB log file - insane, I know).
I recon the mosts transactions allowed should be 1,000,000 records in a single statement. Looking for database trigger to stop them from executing statements with large records?
my question is what all can i bind my results of a select query to.i know we can use Dataset and Sqldatareader. can we use something else like hashtables. for example we can have:reader = cmd.ExecuteReader(); can we have something likeHashtable = cmd.ExecuteReader();
View 5 Replies View RelatedHi,
I think I'm just braindead or simply thick...since this shouldn't be that hard, but I'm stumped right now.
So, I'm trying to retrieve from a table, with a sql stored procedure with the sql like
"select height, width, depth from products where id=@idinput"
OK, so this part is easy, but if I wanted to say, return this to my code and assign height to a variable Ht, width to Wd and depth to Dp, how could I do that?
This is what I've got so far...
[code]
cmdSelect = New SqlCommand( "GetProd", connstr )
cmdSelect.CommandType = CommandType.StoredProcedure
dbcon.Open()
dbcon.Close()
[/code]
The main prob is just what to connect this record to in order to access the individual fields.
Thx :)
Hello,
In the query analyser, I execute a select ' restore database ' + name + ' from disk = " D:sql7dumpackup ' + name + '' + Name + ' _du_21.bak " with move ' ' + name + ' _Données " to " e:sqlbasesasesdata ' + name ' _données.mdf ", move ' ' + name + ' _Journal " to " d:sqllogs ' + name + ' _journal.ldf ", replace From sysdatabases
And some lines are truncated in results ?.
how to avoid that.
I have a Managers table in my SQL DB and it has a ManagerID, MgrName and MgrPhoto field base...
I can code a form with a select button that displays a drop down with the managers in it as choices, but am a little confused as to how I would make the PHOTO (MgrPhoto) change to the corresponding ManagerID that is selected from that option drop down since the SELECT CODE in the form only queries the ManagerID / MgrName combo for the choice.. The photo is below that drop down box and how to make it change to whatever photo is assigned to the selected ManagerID / MgrName ?
Here is the form code with query :
<form enctype="multipart/form-data" action="updatemanagerphoto.php" method="POST">
<select name="ManagerID" id="manager" style="width:400px" class="form_textbox">
<?
$db_connect= mysql_connect($db_host, $db_username, $db_password);
mysql_select_db($db_name, $db_connect) || die(mysql_error());
$sql_query= "SELECT * FROM Managers ORDER BY MgrName ASC";
[code]....
I need to insert data into a table based on the results returned by a select statement. Basically, the select statement below gives me a list of all the work orders created in the last hour.
select worknumber from worksorderhdr where date_created > DATEADD(HOUR, -1, GETDATE())
This might return anywhere between 5 and 50 records each time. What I then need to do is use each of the work numbers returned to create a record in the spec_checklist_remind table. The other details in the insert statement will be the same for each insert, it's just the worknumber from the select statement that needs to be added to the insert where the ?? are below:
INSERT INTO spec_checklist_remind (form, record_type, linked_to_worknumber, spec_checklist_id) values (5, 0, '??',52)"
I have posted this on previous forums, but the below code is a VB.net CLR stored proc that will accepts two parameters, a SELECT.... FOR XML query and a file path, and saves the resulting xml result into a file specified by the parameter. After compiling the VB code into a .dll than the T-SQL code to import the assembly, create the CLR proc and test it is included underneath. Hope some will find this useful
Code Snippet
'Requires the Trial or Release version of Visual Studio .NET 2005 Professional (or greater).
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Data.SqlTypes
Imports Microsoft.SqlServer.Server
Imports System.Xml
Partial Public Class outputxml
<Microsoft.SqlServer.Server.SqlProcedure()> _
Public Shared Sub outputxml(ByVal XmlData As SqlXml, ByVal Filename As SqlString)
'Create the variables to hold the values that are supplied by the parameters
'input by the stored procedure
Dim xmlDoc As New XmlDocument()
Dim output As SqlPipe = SqlContext.Pipe()
Try
'Load the result set into the XmlDoc Variable and then save the results in the
'path provided by the stored procedure. The values are provided by the
'input parameters of the stored procedure
xmlDoc.LoadXml(XmlData.Value)
xmlDoc.Save(Filename.Value)
Catch ex As Exception
'If an error occurs catch the message and pipe it back to SQL
output.Send(ex.Message.ToString)
End Try
End Sub
End Class
T-SQL CODE BEGINS HERE
/*Alter the database to set trustworthy on in order
to allow the ability to set the assembly to external
access*/
ALTER DATABASE AdventureWorks SET trustworthy ON
--Import the assembly into SQL
CREATE ASSEMBLY outputxml
from 'C:outputxml.dll'
WITH PERMISSION_SET = EXTERNAL_ACCESS
-- Create the proc from the imported dll
CREATE PROCEDURE output
@xmldata XML,
@filename nvarchar(1024)
AS
EXTERNAL NAME outputxml.[outputxml.outputxml]
.outputxml
-- Test managed stored procedure
DECLARE @output xml
SET @output = (SELECT ProductID, Name, ListPrice
FROM Production.Product Product
FOR XML AUTO, ROOT('Catalog'), TYPE)
EXEC dbo.outputxml @output, 'c:Output.xml'
GO
Hello all,
I have a problem... I have a SELECT query I have used in my PHP report. It is as follows:
SELECT DISTINCT callref, CASE WHEN (stage.due_date < stage.completed_date) THEN 'SLA Breach' ELSE ' In SLA' END AS sla
FROM tableX....
WHERE call_status=open.....
I wish to search through all stages (i.e response, fix, end) of the calls logged in our database, & then return 'In SLA' for each call that had all its stages completed within the SLA, & 'Breach' for all calls that had even one of its stages completed outside its SLA.
At the moment the SELECT query above gives me the following results:
Call Ref sla
10001 In SLA
10002 Breach
10002 In SLA
10003 In SLA
10004 In SLA
10005 Breach
10005 In SLA
... ...
What it should look like is this....
Call Ref sla
10001 In SLA
10002 Breach
10003 In SLA
10004 In SLA
10005 Breach
... ...
Please let me know if anyone has the answers or any clues to this! thanks.
I have a problem. In my database I have the following numbers available:
101
104
105
110
111
112
113
114
What I need is to get a select query with records and sequentials numbers after it like:
101 0
104 1 (the number 105)
105 0
110 4 (the numbers 111,112,113,114)
111 3 (the numbers 112,113,114)
112 2 (the numbers 113,114)
113 1 (the numbers 114)
114 0
How can I do It?