Is there a way to do a logical exclusive OR (XOR) in sql server?
I'm trying to do this in where clause, something like:
WHERE
(not exists (select 1 from table a where a.date > '01/30/03') XOR
exists (select 1 from table a where a.date < '01/30/03'))
Thanks!
HI, i am trying to make query that has computations with it. but when there's a point computing between int and float i had to use cast() function to convert certain data types. somehow it only works on converting float to integer because when i'm converting an integer into float inorder to be computed with a float it bombs. my query is like this ....
SELECT cast(((cast(((lat - (SELECT LAT FROM TPS_ZIPUSA WHERE ZIP_CODE = 00210)) * 69.1) AS int) ^ 2) + (cast((69.1 * (lng - (SELECT Lng FROM TPS_ZIPUSA WHERE ZIP_CODE = 00210)) * (COS((SELECT LAT FROM TPS_ZIPUSA WHERE ZIP_CODE = 00210) / 57.3))) AS int) ^ 2)) AS float) ^ .5
FROM TPS_ZIPUSA
.5 is where the query bombs. any idea why is this happenning?
by the way, i'm using sql server 7.0.
francis,
Hi,
This is a crosspost, I also asked this question in the learnvisualstudio.net forum. I'm trying to engineer a bit of code in SQL that "decodes" a value stored in a table that represents an array of boolean values, stored using bitwise operations. I have the number, a reference of bit positions for each item, and the actual items checked per the program that normally processes this value. I'm trying to write a sproc that will perform actions based on the booleans in my list, but I can't get the same results the interface gives me.
Here's an example:
Value is 66756
Bit positions 2, 6, 7, and 10 should all return true. I was trying to deduce this using the following:
Code BlockSELECT CONVERT (BIT, <value> & (2 ^ <position>))
but that doesn't work at all. It's my (broken) translation of the code normally used to display this value as a checkbox, which comes from VB6 and looks something like this:
Code Block.ListItems(CStr() & "_").Checked = CBool <value> And (2 ^ <position>))
Can anyone tell me what I'm doing wrong? Thanks in advance.
I was doing a SUM on my returned rows and i found that what i really want is an aggregate bitwise OR on all the returned rows. Do you know what's the function for that?
Thank you
I was looking into some of the System stored procedures like sp_denylogin, sp_grantLogin etc. I found bit wise operations like
update master.dbo.sysxlogins set xstatus = (xstatus & ~1) | 2, xdate2 = getdate()
where name = @loginame and srvid IS NULL
How does the bitwise NOT(~) works with different datatypes like INT, SMALLINT and TINYINT?
Look at the following sample code and result. I just wanted to understand how it works with int and smallint
declare @a int
declare @b smallint
declare @c tinyint
select @a = 1, @b = 1, @c = 1
select @a=~@a, @b= ~@b, @c= ~@c
select @a, @b, @c
Result
~~~~~
-2-2254
Thanks in advance
Gnana
I am new to bitwise thing in MSSQL.Let's suppose there's a table of favorite foodsinsert int fav_foods(food_name,bitwiseVal)values('Pasta',1)insert int fav_foods(food_name,bitwiseVal)values('Chicken',2)insert int fav_foods(food_name,bitwiseVal)values('Beef',4)insert int fav_foods(food_name,bitwiseVal)values('Fish',8)insert int fav_foods(food_name,bitwiseVal)values('Pork',16)How do I write query to find people who selected more than one item andselected items from "Pasta, Chicken, Beef, Pork"(but not fish)?I hope my question is not confusing.....
View 6 Replies View RelatedHello All
I'm working on a recurring multi-day appointment program. Basically the user can choose a meeting on multiple days of the week over a span of time. For example: Tuesday and Thursday from 10:00 to 10:30 from December 1st 2004 to February 27th 2005.
So I've decided the best way to handle this is to assign a value to each day of the week like so:
MON = 1
TUE = 2
WED = 4
THU = 8
FRI = 16
SAT = 32
SUN = 64
So if the user picks TUE and THU that would be 2 + 8 = 10. The value is unique and seems to work.
So the values would be:
@begin_date = '12/01/2004'
@begin_time = '10:00 AM'
@end_date = '02/27/2005'
@end_time = '10:30 AM'
@recur_days = 10
Now I want to pass the values to stored procedure that will decode the recur_days variable and create entries in a table for each date. I'm struggling to figure out 2 things
1. How do I decode the 10 back into 2(TUE) + 8(THU) ( I think it has something to do with the bitwise AND "&" operator but I'm not sure how to use it.)
2. What is the best way to loop through the date range and create a record for each day?
Regards
Russ
I am trying to get a culmulative Bitwise OR operation on a column by query - rather than using a CLR function.
The problem is shown below:
CREATE TABLE #Operations (
PK INT NOT NULL IDENTITY(1,1),
UserName VARCHAR(50) NOT NULL,
UserProcess VARCHAR(50) NOT NULL,
ServerOperation VARCHAR(50) NOT NULL,
Permission INT NOT NULL );
[Code] ....
So Far I've tried SUM - wrong results, and STUFF - which doesn't seem appropriate for bitwise operation - neither give useful results.
-- SUM Operation - fails
SELECT DISTINCT
UserName,
ServerOperation,
SUM(Permission) AS Permission
FROM #Operations
[Code] ....
It may be possible to materialise the permissions each time one is changed (e.g. by to use a cursor ), however I would prefer a query or function or combination to generate the result.
I would like to do something like a SELECT * FROM Files WHERE (Attributes & ?) but the & operator isn't recognized. I looked at the documentation sample for it and in the sample the & operator isn't used in the WHERE clause so I thought that might be the reason but I still can't get the operator to work. So even the doc sample code for it doesn't work.
View 3 Replies View RelatedI want to create a custom bitwise OR aggregate function.
I want to use it like the built in aggregate functions (MIN, MAX etc.)
SELECT dbo.bitwise_or(bit_string) FROM table
where bit_string is a nvarchar(3)
so for example if the table contains two rows ('100', '001') the above query should return '101'
I would like to implement this as a CLR function/assembly with the aggregate below:
CREATE AGGREGATE dbo.bitwise_or (bit_string nvarchar(3))
RETURNS [nvarchar(3)]
EXTERNAL NAME [Aggregate].[bitwise_or]
I have followed this post to implement amedian aggregate function [URL] ..... but there is a lot of code (not sure what is really needed in my case).
Hi,
We are facing a problem while passing a string containing the "&" character into Full Text search CONTAINS predicate. The records that do have this character are not being returned by the search.
I'd like to raise two questions:
1) Is there any special way to escape this character?
2) Does FTS index it at all?
We have tried all known (to us) ways of escaping like doubling the character, using char(38), using ESCAPE etc..Nothing seem to work. Any help would be appreciated.
Thanks,
Alex
Hi,
When I open an application, it prompts me for a message that SQL is locked in exclusive mode by other application.
How to solve this?
thanks in advance
christine
Hi,
How do you lock a table in exclusie mode before running a query?
thanks,
A problem about many to many relationships from an SQL beginner. Here's a contrived abstract example, as I'd prefer not to give away specifics.
Imagine I have two tables: users, food
The relationship (to like) is many-to-many so I've got a link table, which might look like the below:
andrew, apples
bob, banana
bob, apples
chris, carrots
chris, apples
chris, banana
I want to select users who like bananas and apples exclusively.
The answer should be 'bob' ONLY. select * from users inner join food on <IDs> where food in ('bananas','apples') isn't suitable , because it'll also return 'chris' who should be disqualified (because he also likes carrots).
Apart from potentially being bad DB design (although this is an abstract example; I do have ID numbers), can anyone suggest how to get this in a scalable way?
Anybody know how a SELECT statement can generate an exclusive lock on a table ?
I always thought that SELECT's take out shared locks. Is this something to do with temporary tables generated by ORDER BY's and DISTINCT ?
Rogue SQL below (from Site Server).
SELECT A.i_Dsid, A.i_Aid, A.vc_Val, A.i_Val, A.dt_Val, A.img_Val FROM Object_Attributes A, ( SELECT DISTINCT L.i_Dsid FROM Object_Lookup L , Object_Attributes OA2 (index = IND_vc_Aid) WHERE ((( L.i_ObjectClass = 9999 )) AND ( OA2.vc_Val LIKE ( '999999999.9999999%' ) AND OA2.i_Aid = 99)) AND (L.i_Container_Dsid = 99) AND ( OA2.i_Dsid = L.i_Dsid )) AS B WHERE B.i_Dsid = A.i_Dsid AND A.i_Aid NOT IN( 1, 2, 3, 4, 5 ) ORDER BY A.i_Dsid, A.i_Aid
Can anybody suggest a workaround ? Thanks.
Hi,
i need to run a restore of a database overnight onto a different server using the live data .bak file. however the job failed on the first run (last night) with the error:
"Exclusive access could not be obtained because the database is in use. ...."
how do i gain this Exclusive use via an SQL statement please?
Hi.
I need to access a database to modify, updates,... massively . It's possible to lock a database and have exclusive access?
(SQLServer 2000)
thanks.
Francisco
I have created a SQL Agent job that is supposed to essentially duplicate a production database to another database. The code I am using is:
step1
__________________________________________________ ______
declare @sql varchar(8000)
set @sql=''
select @sql=@sql+'kill '+cast(spid as varchar)+char(13)+char(10)
from sysprocesses where dbid=12
--Print (@SQL)
exec(@sql)
step2
__________________________________________________ ________
RESTORE DATABASE HIWDYNARPT FROM PRDBACKUP
WITH REPLACE
__________________________________________________ ______
This works when I test it during the day, however when it runs at night I get the following error in the job log:
Database in use. The system administrator must have exclusive use of the database to run the restore operation. [SQLSTATE 42000] (Error 3101) Backup or restore operation terminating abnormally. [SQLSTATE 42000] (Error 3013). The step failed.
I'm not sure why this happens because I have killed all open threads in step 1, and then create my own new thread in step two. Maybe someone else is initiating a new thread to quickly between the steps???
Anyway, I am trying to use:
__________________________________________________ __
ALTER DATABASE HIWDYNARPT
RESTRICTED_USER
WITH ROLLBACK IMMEDIATE
__________________________________________________ ____
...as an alternative to the T-SQL killing PID's, but SQL 7.0 SP4 does not seem to support restricted user like 2000. It keeps giving me a syntax error. Does anyone have any suggestions?
If I bring step 1 and step 2 together, separated by "GO", could this fix the problem?
Thanks in advance!
Ryan Hunt
Could anybody give a lead as to what I can do get rid off this error please.
I alread tried following:
use master
go
Alter Database dbname set single_user with rollback immediate;
go
Still have the issue. SQL 2005 Server actually did lock the db.
So ran
Alter Database dbname set multi_user;
go
and refresh Query and it switch back to multi user.
But I can't restore db yet.
Thank you
Are Intent exclusive locks compatible with rowlock?
I am getting a deadlock since i have ix lock on a page and another process(select query) is trying to acquire a shared lock.How can i solve this?
Hello All!
I want to perform 4 or 5 statements as a transaction but I need to make sure that during this complete transaction no one else inserts or deletes records from a table named SomeTable.
So how can I lock MyTable at the beggining of the transaction so that during my transaction no one else can insert or delete anything in table SomeTable?
Thanks!
David
How to close the existing connections to a particluar database in sql server. Please note that i donot want to start stop sql server. I just want to close the existing connections so that i can do a restore on that database programatically.
I am using sqldmo for this purpose. Does anyone knows how to do that with sqldmo or is there any other method??
Waiting for your earliest replies
Hi,
Is it possible to place an exclusive row lock when running a SELECT query by using a lock hint (or otherwise).
Basically, when a select statement is run against a table I don't won't any other users to read that row until it has been updated - at some later stage.
Any suggestions on whether this is possible would be welcome.
Thanks,
Karl
Hi!
We're using a backup with sql server agent when doing a backup / restore
procedure. In some cases I get the following error when the restore job
fails:
Executed as user: DOMAINAdministrator. Exclusive access could not be
obtained because the database is in use. [SQLSTATE 42000] (Error 3101)
RESTORE DATABASE is terminating abnormally. [SQLSTATE 42000] (Error 3013).
The step failed.
Is it related to unhandled lock? I've resolved this by restarting the sql
server. But is there a way to avoid such issues?
One more question. Is it OK to backup/restore database while there're users
connected? Or I can do only backup?
I'm relatively new to SQL and I've come across something that doesn't seem quite right. When an insert becomes part of an transaction I notice an exclusive KEY lock in Enterprise Manager. The table in question was using a Clustered index but I changed that, dropped the table and brought it back in but I still get the lock which keeps all others out of the table. Is this the expected behavior or is there something I am missing? Could the size of the tabe affect things? This is a very small table currently. I'm using MSSQL 7 sp3.
Thanks,
John
Hi ,
I have some issues with deadlock.I am getting deadlock becuase of two
select on same table. The sql server log is like this ,
Select statements should have always shared lock.I am not getting why
its doing exclusive lock and creating deadlock.
5/6/2008 12:38 spid4s Unknown Deadlock encountered ¦. Printing
deadlock information
5/6/2008 12:38 spid4s Unknown Wait-for graph
5/6/2008 12:38 spid4s Unknown Log Viewer could not read information
for this log entry. Cause: Data is Null. This method or property
cannot be called on Null values.. Content:
5/6/2008 12:38 spid4s Unknown Node:1
5/6/2008 12:38 spid4s Unknown KEY: 9:72057594050117632 (8d036f07c58f)
CleanCnt:3 Mode Flags: 0Γ0
5/6/2008 12:38 spid4s Unknown Grant List 3:
5/6/2008 12:38 spid4s Unknown Owner:0Γ12E9F160 Mode: S Flg:0Γ0 Ref:1
Life:00000001 SPID:68 ECID:0 XactLockInfo: 0Γ353D1C54
5/6/2008 12:38 spid4s Unknown SPID: 68 ECID: 0 Statement Type: SELECT
Line #: 4
5/6/2008 12:38 spid4s Unknown Input Buf: Language Event: (@actDefId
nvarchar(36)@stateList varchar(1)@stateList1 varchar(1)@procRelObjType
smallint@procRelObjIdList varchar(36))
5/6/2008 12:38 spid4s Unknown Requested By:
5/6/2008 12:38 spid4s Unknown ResType:LockOwner Stype:ORXdes:
0Γ2FBB67F0 Mode: X SPID:112 BatchID:0 ECID:0 TaskProxy0Γ0792E378)
Value:0Γ38baa20 Cost0/11888)
5/6/2008 12:38 spid4s Unknown Log Viewer could not read information
for this log entry. Cause: Data is Null. This method or property
cannot be called on Null values.. Content:
5/6/2008 12:38 spid4s Unknown Node:2
5/6/2008 12:38 spid4s Unknown KEY: 9:72057594049986560 (6f02e1cd37c3)
CleanCnt:3 Mode:X Flags: 0Γ0
5/6/2008 12:38 spid4s Unknown Wait List:
5/6/2008 12:38 spid4s Unknown Owner:0Γ12396EE0 Mode: S Flg:0Γ2 Ref:1
Life:00000000 SPID:90 ECID:0 XactLockInfo: 0Γ0AA8178C
5/6/2008 12:38 spid4s Unknown SPID: 90 ECID: 0 Statement Type: SELECT
Line #: 4
5/6/2008 12:38 spid4s Unknown Input Buf: Language Event: (@actDefId
nvarchar(36)@stateList varchar(1)@stateList1 varchar(1)@procRelObjType
smallint@procRelObjIdList varchar(36))
5/6/2008 12:38 spid4s Unknown Requested By:
5/6/2008 12:38 spid4s Unknown ResType:LockOwner Stype:ORXdes:
0Γ353D1C30 Mode: S SPID:68 BatchID:0 ECID:0 TaskProxy0Γ13B3E378)
Value:0Γ12e9e780 Cost0/6164)
5/6/2008 12:38 spid4s Unknown Log Viewer could not read information
for this log entry. Cause: Data is Null. This method or property
cannot be called on Null values.. Content:
If you have any idea regarding this please let me know ASAP.
Thanks in advance .
Purpose
I would like to know if it is possible and if so how to implement exclusive access to a given record within in a database table.
Example
For example, you can open a file system file with exclusive access so other processes cannot access the file until it is released. I would like to implement a solution that provides this same exclusive access at the database record level. Preferably a solution that does not require creating and managing table access state flags. (i.e. FieldName.State = (Closed, Opened, Exclusive)) I would like for the database server to mange this solution and return an error status when trying to access a record that has been opened exclusively. Furthermore, I would like to avoid using triggers.
Application Utilization
Im working on a system that has multiple threads that are each responsible managing data from the same normalized table. Each of these system threads work on the same unique record in parallel. Therefore it is possible that thread (0)s changes could be overwritten by thread (n)s. I would like to have each thread open the unique record exclusively and release it when finished. All of the other threads would loop until the record is released.
Questions
1. Is it possible to implement this at the server level?
2. What would be the easiest best practice for implementing this functional requirement?
Thanks,
Sean
Hi, I've got three tables that I'm trying to pull data from. The first is a family of rings, the second is the individual rings and the third relates one ring to another:
RingFamilies
------------------------------------
FamilyID pk | FamName
------------------------------------
Rings
-------------------------------------------
RingID | FamilyID fk | RingName
-------------------------------------------
RingAssociations
-----------------------------------------
RingID1 pk/fk | RingID2 pk/fk
-----------------------------------------
I'm trying to pull a list of RingIDs and names for a given FamilyID. To complicate it, I want to exclude rings that are already associated to a given RingID, i.e. I only want the unassociated rings in a given family. To complicate it even a little more then name needs to be the FamName+RingName...is this possible? Thanks!
Given @FamID and @RingID
Result Table
------------------------------------------------
RingID | FamName + RingName
------------------------------------------------
Hi All,
My question is regarding SQL Server database security. I want to create a login using SQL Server Authentication and assign it db_owner rights for my database. So far so good. But the critical part is that I want to give exclusive rights for my database to this user only i.e. no other users (dbo, guest etc) should be allowed to access my database.
It will be good to present here the scenario which I need to implement. I am running an ASP.NET application that uses SQL server 2005 db at back end. The database server might have other databases as well but I don't want the administrator (either SQL server admin or the server administrator) to be able to get access to my database or even view the schema. I don't want any other user except my own user to be able to detach the database or perform backup or restore operations.
I hope I was able to deliver the requirement.
Hi
I am trying to use sql server 2005 management stodio to restore a database. But I got this error message:
Exclusive access could not be obtained because the database is in use
Anyone know how to solve this problem?
Thanks
Li
I have a test database that is automatically restored from the live database each day at 2:30AM. I recently started receiving this message:
Exclusive access could not be obtained because the database is in use.
and the restore is not able to occur.
Any ideas on how I can prevent this from happening?
I restored a full backup of db...then I use this script to backup log, using the stop at function:
Restore log db from disk='e:Program FilesMicrosoft SQL ServerMSSQLBACKUPdb_tlog_200411300800.TRN' with
RECOVERY,STOPAT = 'Nov 30, 2004 1:00 AM'
when I run this script in Query Analyzer, I get:
Server: Msg 3101, Level 16, State 1, Line 1
Exclusive access could not be obtained because the database is in use.
Server: Msg 3013, Level 16, State 1, Line 1
RESTORE LOG is terminating abnormally.
No other connections are present to the database except my connection through QA ...what can I do ?..please respond ASAP
thank you
Ive been playing with this for a few days and thought I might thow itout for seggestions.I have Several Queries that need counts returnedThe Queries are Mutually Exclusive meaning whatever Query they returnin first they cannot be included in the counts of any queries belowthem.This set of queries for exampleSelect ID From Customers where FIRST_NAME = 'Chris' (would return say150)Select ID From Customers where ST='OH' (This would retunr say 50, BUTRun alone it might return 70, however 20 of those were in the firstQuery so they arent to be retunred in this result set.The total for Bot Queries would be 200But If I reverse it like soSelect ID From Customers where ST='OH' (This now returns 70)Select ID From Customers where FIRST_NAME = 'Chris' (This now returns130)The total of course for BOT Queries is 200 but I dont need that total Ineed the total for EACH Query depending on its orderingWhat I need are the single counts depending on the order in which thequeries are runIt seems like a recursion problem, but It might go past 32 level so Icant use recursive SQL ( I dont think )I've thought of (or tried to think how to use Not In, Not Exist, etcbut still dosent come up with the results....)How Can I grab the counts for each Query ?Chris
View 5 Replies View Related