Hi!
Is it possible to use updategrams on chain relationships? When I try
I always get this message:
<?MSSQLError HResult="0x80004005" Source="Microsoft XML Extensions to
SQL Server" Description="There is an inconsistency in the schema
provided"?>
If you have got updategrams to work with chain relationships, please
let me know. Thanks for any help!
/Tomas
Log Shipping on SQL 2005 is failing because of a gap in the log chain. The schedule is every 15 minutes, the backup and copy jobs run without issue. The failure occurs early in the morning when there are no users, maintenance activities, or scheduled jobs - this has happened twice since we applied SP2. The database that is participating in the log shipping is approximately 20Gb, and recovery takes several hours.
Are there any known issues with log shipping on SP2? Any ideas why this might be happening? Is there any other information I can provide to help debug this issue?
Server: Msg 8908, Level 22, State 6,
on index defragmentation on a table.
Table error: Database ID 490, object ID 517576882, index ID 0. Chain linkage mismatch. (1:13020)->next = (1:13021), but (1:13021)->prev = (1:13080).
from error.log found corresponding error on dbcc checkdatabase on this same database:
I/O error (bad page ID) detected during read at offset 0x00000006614000 in file
'T:DataABCABC_data.mdf'..
Waiting for type 0x4, current count 0x100022, current owning EC 0x76A85540.
Error: 823, Severity: 24, State: 2
is there a way to fix this chain linkage mismatch error?
thanks
-D
I have been throwing these lovely errors on my db (approx 16Gb) all of a sudden - they might all be related:
1) Operations Manager Critical Error Alert
Severity: Critical Error
Status: New
Source: MSSQLSERVER
Name: Attempt to fetch logical page belongs to different object .
Description: Error: 605, Severity: 21, State: 1
Attempt to fetch logical page (4:1878339) in database 'NGProd' belongs to object 'claim_requests', not to object 'Assessment_'.
2) Event Description:
Error: 644, Severity: 21, State: 5
Could not find the index entry for RID '36303030318eefd3713d52f4a85df3b0b8a889904e4e608102703230303530393139'
in index page (3:271543), index ID 9, database 'NGProd'.
3) Event Description:
Error: 8908, Severity: 22, State: 6
Table error: Database ID 10, object ID 86095893, index ID 0. Chain linkage mismatch. (4:1880687)->next = (4:441596), but (4:441596)->prev = (4:441595)
dbcc checkdb gives me 0 errors & running the built-in integrity reports does not seem to find anything.
I have been told that my db has "cracks" in it, and that I need to export ALL of it and then re-import. Seems a bit too much work...
Anyone have any ideas on what I should first attempt to do? I don't even know how to fix these errors... seems that I only throw then when users are accessing specific records.
Any help would be most welcome!
Thanks,
k
Hello :
I have a request which me dismissal 10 lines (normal select), I want to have quite lines in a single chain of character, separated one in the others by a comma:
A
B
C
D ------> A,B,C,D
What is that you have an idea for ca.
Thank you.
I'm trying to write a script that will go against sysprocesses (I think) and find the head of a blocking chain, and how many SPIDs it is blocking on down the line.
I found a reference to a script called head_blockers.sql in the Swynk Scripts database (posted March 2000), but the script appears to no longer be available for download.
Any help would be appreciated!
Thank you,
Susan Jones
Recently I have been getting a barrage of errors such as:
DESCRIPTION:Error: 8908, Severity: 22, State: 6
Table error: Database ID 16, object ID 1893581784, index ID 2. Chain
linkage mismatch. (1:17214)->next = (1:17060), but (1:17060)->prev =
(3:178).
and
DESCRIPTION:Error: 605, Severity: 21, State: 1
Attempt to fetch logical page (1:164756) in database 'Clients' belongs
to object 'activities', not to object 'entity_address_check'.
The problem began to originally manifest itself with a couple errors
similar to:
DESCRIPTION:Error: 605, Severity: 21, State: 1
Attempt to fetch logical page (1:4930) in database 'tempdb' belongs to
object '1732152167', not to object
'#allrowstable____________________________________ __________________________________________________ _________________000100003472'.
So far all of the errors have been isolated to indexes and I have been
able to repair the problems with CHECKDB fast_rebuild or by dropping
the index that is causing the error and recreating it. At times the
errors will appear for a couple hours overnight and then resolve
themselves before the morning. Originally the problem began to appear
on a single SQL Servers and now appears daily on all three SQL
Servers.
We've investigated whether the NOLOCK optimizer was the culprit but
out of all of our views and procedures there was nothing compiled with
that optimizer in any of the databases, so this seems an unlikely
cause (SEE http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B308886
)
We've reviewed IO on the servers, and nothing appears out of the
ordinary. We have even checked into the possibility of unreport IO
errors (SEE http://support.microsoft.com/default.aspx?scid=kb;en-us;826433&Product=sql2k
) but this still is inconclusive. HP did admit that their disc array
is not fully compatible with W2K Adv Server SP3, but the problem only
recently appeared and the upgrade to SP3 was completed nearly 2 months
ago.
We are running SQL Server 2000 EE, SP3 build 2195 on Windows 2000
Advanced Server. The server is setup as an A/P cluster on 2 HP
Proliant servers with a HP HTA200 disc array.
If anyone has any insight or suggestions, it would be great to hear
them.
I'm having a problem where I see consistency errors in my databases on a regular basis (at least twice a week).
I have several databases running on the same instance of SQL Server. During any given week, at least one of the databases will show consistency errors. At times, more than one at the same time will show these errors. These have odd effects on queries, sometimes making a SELECT (for instance) that should run in 5 seconds have to be killed after running for over an hour.
I'm running SQL Server 2000, version 8.00.194. The host OS is Windows 2000 with the latest service pack. RAID 5 is the storage solution.
Below are two DBCC outputs from different databases on the same machine. They are slightly different in that one starts out with "Parent node for page was not encountered"; and the other with "Page is missing a reference from previous page".
My hardware guys assure me there is no hardware failure going. I don't see anything that would suggest there is one in any of the event logs or in the Dell OpenManage system checks.
These DBCC errors are repairable without data loss, yet the databases have to be taken down to single user mode to do so (unacceptable during the day). But at the same time, certain operations in the database become impossible to perform when these errors crop up (such as the aforementioned infinite SELECT problem).
Any help in diagnosing why these pop up, or how to prevent them would be greatly appreciated.
The DBCC outputs:
-----------------------------------------
dbcc checkdb('ValidValues') with no_infomsgs
==========
Server: Msg 8978, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 3. Page (1:10921) is missing a reference from previous page (1:75359). Possible chain linkage problem.
Server: Msg 8976, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 3. Page (1:75354) was not seen in the scan although its parent (1:75424) and previous (1:75352) refer to it. Check any previous errors.
Server: Msg 8980, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 3. Index node page (1:75424), slot 19 refers to child page (1:75355) and previous child (1:75354), but they were not encountered.
Server: Msg 8980, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 3. Index node page (1:75424), slot 20 refers to child page (1:75356) and previous child (1:75355), but they were not encountered.
Server: Msg 8980, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 3. Index node page (1:75424), slot 21 refers to child page (1:75357) and previous child (1:75356), but they were not encountered.
Server: Msg 8980, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 3. Index node page (1:75424), slot 22 refers to child page (1:75358) and previous child (1:75357), but they were not encountered.
Server: Msg 8980, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 3. Index node page (1:75424), slot 23 refers to child page (1:75359) and previous child (1:75358), but they were not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:10931) was not encountered.
Server: Msg 8979, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Page (1:10932) is missing references from parent (unknown) and previous (page (1:75671)) nodes. Possible bad root entry in sysindexes.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:10933) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:10934) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:10937) was not encountered.
Server: Msg 8979, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Page (1:10940) is missing references from parent (unknown) and previous (page (0:0)) nodes. Possible bad root entry in sysindexes.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:10941) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75664) was not encountered.
Server: Msg 8980, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Index node page (0:0), slot 0 refers to child page (1:75665) and previous child (0:0), but they were not encountered.
Server: Msg 8981, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. The next pointer of (1:75664) refers to page (1:75666). Neither (1:75666) nor its parent were encountered. Possible bad chain linkage.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75673) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75674) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75675) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75676) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75705) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75706) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75707) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75708) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75737) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75738) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75739) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 926626344, index ID 5. Parent node for page (1:75740) was not encountered.
CHECKDB found 0 allocation errors and 29 consistency errors in table 'Company' (object ID 926626344).
CHECKDB found 0 allocation errors and 29 consistency errors in database 'ValidValues'.
repair_rebuild is the minimum repair level for the errors found by DBCC CHECKDB (ValidValues ).
-----------------------------------------
dbcc checkdb('Revenue') with no_infomsgs
==========
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110576) was not encountered.
Server: Msg 8980, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Index node page (0:0), slot 0 refers to child page (1:110577) and previous child (0:0), but they were not encountered.
Server: Msg 8981, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. The next pointer of (1:110576) refers to page (1:110578). Neither (1:110578) nor its parent were encountered. Possible bad chain linkage.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110585) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110586) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110587) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110588) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110617) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110618) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110619) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110620) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110649) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110650) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110651) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:110652) was not encountered.
Server: Msg 8979, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Page (1:124495) is missing references from parent (unknown) and previous (page (1:110581)) nodes. Possible bad root entry in sysindexes.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:124512) was not encountered.
Server: Msg 8979, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Page (1:124513) is missing references from parent (unknown) and previous (page (0:0)) nodes. Possible bad root entry in sysindexes.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:124521) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:124650) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:124651) was not encountered.
Server: Msg 8977, Level 16, State 1, Line 1
Table error: Object ID 2089058478, index ID 2. Parent node for page (1:125214) was not encountered.
CHECKDB found 0 allocation errors and 22 consistency errors in table 'Operational_Reporting' (object ID 2089058478).
CHECKDB found 0 allocation errors and 22 consistency errors in database 'Revenue'.
repair_rebuild is the minimum repair level for the errors found by DBCC CHECKDB (Revenue ).
Hi All,
I was trying to install Sql Server Express 2005 using the setup made using Visual Studio 2005 Publisher Wizard, as a pre-requisite. During this i'm getting the following error...
"SQL Server Setup could not connect to the database service for server configuration. The error was: [Microsoft][SQL Native Client]SSL Provider: The certificate chain was issued by an authority that is not trusted."
What does this mean? Anyone is familiar with this, then pray please post a reply. I'm in the middle of nowhere now....
Thanks in Advance....
VigithVG
We are running SQL Server 2012 on Windows Server 2008. Just wondering what type of actions would break the backup-chain or backup sequence? For instance, if you have tlog backups being taken every 10 minutes and you stop the SQL Server Service for say 30 minutes. Would this action break the backup chain? Or would everything return to normal once the SQL Server Service is restarted?
View 7 Replies View RelatedIf Transaction Log Backup fails due to a conflict could it break the Log Chain?
View 3 Replies View Related i have enable cross database chain,but it return error message:
The server principal "S-1-9-3-1149532189-1170944071-2610337685-3868961652." is not able to access the database "db2" under the current security context.
I list the sql script as follows:
Code Block
use master;
go
create database db1;
create database db2;
go
use db2
go
create table table1
(
col int
)
go
use db1
go
create user u1 without login
go
create proc p1
as
insert into db2.dbo.table1 values(1)
go
grant execute on p1 to u1
execute as user='u1'
exec p1
thanks
Hi.
I have problem executing several SSIS-packages in a chain.
To be more precise:
I have implemented a Biztalk 2006 application which via a local webservice executes an SSIS package. The package it self calls another SSIS package, which is located in the same folder as the calling package. The second package then calls a third package etc.
The problem arises, when the first package calls the second package. An Access Denied exception is received. Can any one explain me how to fix this?
The user connected to the application-pool that the weservice is running under, has execution-rights on all of the packages.
Thanks
I'm performing SQL Server native backups and Comvault Backups are breaking the backup chain?I can work around them if they only perfume 1 backup per day.We have a 3rd party hosting our servers so I do not have much control as to what they do.I have concerns about being able to get my databases Comvault being restored.
View 2 Replies View RelatedHi
I am trying to install SQL Server 2005 Express on my machine, which has Windows Server 2003 with Service Pack 1. I could not able to install properly and i am getting error always.
Here is the Error I am getting always "The certificate chain was issued by an authority that is not trusted" . I am trying for past few days i could not able to resolve.
Please help
Thanks
Here is the Error message from Summary.txt
Microsoft SQL Server 2005 9.00.1399.06
==============================
OS Version : Microsoft Windows Server 2003 family, Service Pack 1 (Build 3790)
Time : Tue Sep 05 12:31:18 2006
--------------------------------------------------------------------------------
Machine : SERVIDORCC
Product : Microsoft SQL Server 2005 Express Edition
Product Version : 9.00.1399.06
Install : Failed
Log File : C:Archivos de programaMicrosoft SQL Server90Setup BootstrapLOGFilesSQLSetup0008_SERVIDORCC_SQL.log
Last Action : InstallFinalize
Error String : SQL Server Setup could not connect to the database service for server configuration. The error was: {Microsoft}{SQL Native Client}SSL Provider: The certificate chain was issued by an authority that is not trusted.
Error Number : 29515
--------------------------------------------------------------------------------
SQL Server Setup failed. For more information, review the Setup log file in %ProgramFiles%Microsoft SQL Server90Setup BootstrapLOGSummary.txt.
Time : Tue Sep 05 17:12:41 2006
Ok, so I open up a book on beginning sql and it discusses relationships.There is something that appears wrong. I am not understanding how the book is describing the one to one relationship. In it's figure, it shows that the same agency can have two different artist id's. But according to it's definition of one to one list can be related from both tables.Can someone explain this further please?Thanks in advance.
View 3 Replies View RelatedHow do you show many to many relationships in ASP.NET with datasources?
I can retrieve the information from the database easily but I can't manage to save that information into a variable so that i can then call for only information in the M2M table related to the ID Key I want. For example..1 <asp:Label ID="lblTestLabel" Text='<%# DataBinder.Eval(Container.DataItem, "title_id") %>' Runat="server" />
2
3 <script language="VB" runat="server">
4 sub Page_Load(sender as Object, e as EventArgs)
5 Dim lblTitleID As Label = Repeater1.FindControl("lblTestLabel")
6 Response.Write(lblTitleID.text)
7 End Sub
8 </script>
When I try to run this script it dosn't work and I get the error:
System.NullReferenceException: Object reference not set to an instance of an object.
For line 6 of the code above. Is there a way to just retrieve information from a datasource without storing information into a label first?
PS: I use sqldatasource tags to retrieve information like:1 <asp:SqlDataSource ID="DataSet1" runat="server"
2 ConnectionString="Driver={MySQL ODBC 3.51 Driver};server=localhost;database=;user=;pwd=;option=3;"
3 ProviderName="System.Data.Odbc"
4 SelectCommand="Select * from titles order by title_id">
5 </asp:SqlDataSource>
Can someone help me sort something out. Suppose we have two tables in a database.One is named Person, and one is named Birthday. Is this a many to many relationshipor a 1 to many relationship?
Person has many birthdays. Example. Joe Schmoe has a birthday for every year of his life. birthday(7/11/1976) has many People (Many people have a birthday on 7/11/1976.
Is there any easy way of getting all the relationships for the tables in aSQL server db? I've looked through Google and the Books online but I'm barely scratching the surface on the systables. I know I can go to each individual table and get the dependencies or even print out the diagram through Enterprise Manager but I really don't want to have to type out all the primary/foreign keys for 100+ tables. Any help on getting this data either through a 3rd party software or querying the systables would be great.
THT
DMW
We have a table with approximately 150 colums and 2/3 of them are bit datatypes. We do not expect much activity on this table. Does it make sense to separate it into a few tables instead of 1 with one-to-one relationships? Will the join(s) significantly slow down our web application? Thank you
View 2 Replies View RelatedMy hosting servers have "myLittleAdmin" installed. I am new to ms sql I have some experience with Access but I have never set up Relationships inside the database server. I have always just relied on my application logic to call the relations. What is the benefit to setting up relationships in sql, if any?
View 4 Replies View RelatedIs there a tool in Enterprise manager to list out the one to many & many relationships with a database?????:?:
View 4 Replies View RelatedHey, I have SQL Sever Enterpise Manager. I am new at this company and I need to know the relationships between ALL the tables. Is there anywhere I can go to view all the primary keys and the relationships?
View 3 Replies View RelatedI am viewing tables in the ‘object explorer’- I can see the tables. If I open it up I can see columns, keys, constraints etc…
So I can see they key… can I tell which table/field the foreign key is connected to?
thanks
Hello,
I have 3 tables. Posts, PostsTags and Tags.
This is a many to many relationship.
So PostsTags has the following columns:
PostId (PK) and TagId (PK)
I always did that way in SQL 2005.
In some examples I see PostsTags have 3 columns:
PostTagId(PK), PostId (FK), TagId (FK)
Should I use it this way, instead?
Thanks,
Miguel
Is it possible to have 2 different databases and create relationships inbetween the two? I am thinking about way down the road and the size of the databases and I believe that I need to split my data into multiple databases to keep from running into the size limitations.
Davids Learning
Ok, so I open up a book on beginning sql and it discusses relationships.
There is something that appears wrong. I am not understanding how the book is describing the one to one relationship. In it's figure, it shows that the same agency can have two different artist id's. But according to it's definition of one to one list can be related from both tables.
http://foo.gearsector.com/foo/instr_scrns/oneToMany.gif
Can someone explain this further please?
Thanks in advance.
How can I use with relationShips in SQl?
Tamir BLoch .
Hello!
I have a really small database in terms of number of objects, but very big in terms of data (possibly millions of records). I always try to design my databases to be in the 3rd normal form (at least I hope they are!), but sometimes (for databases consisting of just a few tables) maintaining M:N relationships looks like an over-bloated approach to me... Let's see an actual example. I have a table like this:
Code SnippetCreate table [Airfares]
(
[OriginCity] Char(3) NOT NULL,
[DestCity] Char(3) NOT NULL,
[FareDate] Datetime Default getdate() NOT NULL,
[Price] Decimal(9,2) Default 0 NOT NULL,
[PriceChange] Decimal(9,2) Default 0 NOT NULL,
[Wrong] Bit Default 0 NOT NULL,
Primary Key ([OriginCity],[DestCity],[FareDate])
)
go
Now, at first there also was an Airline nvarchar(50) field, which stored the airline name. But now the client requested to store fares for a few airlines if it's the same price and city pair. This way we can have 3 airlines offering the same price on the same itinerary for example. So I added a dictionary table called Airlines:
Code SnippetCreate table [Airlines]
(
[AirlineCode] Char(2) NOT NULL,
[Name] Nvarchar(50) NOT NULL,
Primary Key ([AirlineCode])
)
go
Now, there are two things I can do. We are obviously dealing with the M:N relationship type here. I can either add another nvarchar column in the first table, like Airlines nvarchar(255) and store something like 'AA,AB,AC' there - those would be airline codes. OR I could do it the proper way and create a cross-reference table which will connect both Airfares and Airlines tables (this will store as many records as there are airlines for that particular itinerary, offerring the same price):
Code SnippetCreate table [AirfareAirlines]
(
[AirlineCode] Char(2) NOT NULL,
[OriginCity] Char(3) NOT NULL,
[DestCity] Char(3) NOT NULL,
[FareDate] Datetime Default getdate() NOT NULL,
Primary Key ([AirlineCode],[OriginCity],[DestCity],[FareDate])
)
go
But this is starting to look overly complicated, isn't it? The pros of this are I'm going to get real relationships, referential integrity, etc., but cons are more difficult code to query all this. What would you do? Do we really need referential integrity everywhere? Are there times when we're better not using relationships? I have seen many programmers skip referential integrity before, which always made me think they are missing something important in a Relational Database Management System.
Hi
How I can get to see the relationships, like in access, in sql 2005?
Thank,
K
Ok - I am still a bit weak on SQL. My understanding of FK relationships in a database are to reinforce the data integrity - Correct? For example, does it make sure that the id given for SiteID does indeed exists. Can it link tables like JOIN in select statements? If not, is there any gains by creating them, such as performance?
View 1 Replies View RelatedI'm having some trouble working out how to query some data. Rather than explain up front, here's some examples of what I want to achieve:
*******************************************************
I've got a structure which looks vaguely like this:
[ANCESTORS]
Grandparent
Parent
Child
If limit by grandparents, then I only get the lineage for that particular grandparent. I.e.:
SELECT *
FROM [ANCESTORS]
( some sort of joins here )
Where Grandparent.Name = 'Cybill'
This would return all of the children of 'Cybill' and their children. Now, if I use the following query:
SELECT *
FROM [ANCESTORS]
( some sort of joins here )
Where Child.Name = 'Jean'
This would return Jean's parents + the parents of Jean's parents (Jean's grandparents).
Likewise, if I enter:
SELECT *
FROM [ANCESTORS]
( some sort of joins here )
Where Parent.Name = 'Ron'
Then I would get Ron's parents and also his children.
*******************************************************
So, as you can see, at first it appears that I'm after a LEFT JOIN - meaning that the grandparents don't need to have child records to be returned, but, then it turns out that I need INNER JOINS - to limit grandparents when I choose children.
Can anybody see my dilemma here?
Mark-up ASP.net posts here
MarkItUp.com
Hi
I am using the Web Matrix Project to write a .NET
application. I have set up a database using MSDE which I
accessed through the Web Matrix Project to start with. I have now
found the Web Data Administrator which I use to backup my database and
help to transfer it to the Server where I hope to run this application
(if I ever get it finished!).
I need to set up some relationships between database tables but cannot
see a way to do this. SQL Server Books on Line referes to
Enterprise Manager which I believe ships with the full MS SQL Server
package (and costs a package). I am doing this on a
shoe-string. Any ideas on how to do it?
Thanks in advance.
Mike