How To Check If DB Constraints Are Enabled In A Database?
Mar 6, 2006How to check if DB Constraints are enabled in a database?
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Enabled/disabled Constraints....
Jul 24, 2000Hi,
I'm using SQL Server 7.0. I'd like to know if there is anywhere in the information schema or system tables where I can tell that a constraint has been flagged as 'enable constraint for INSERT AND UPDATE' or not.
Thanks in advance,
Darrin
Check Constraints
Dec 1, 2000How do i create a check constraints on column a so it dose not accept $ character? syntax pls.
Thanks
Check Constraints?
May 4, 2002Hi,
I am developing a database for my company in SQL server 2000 and I have some
few problems.
Firstly.
I have a customers table and orders table in my DB:
Customers Orders
--------- ------
CustID (primary key) ----------------< CustID
. ^ ProductID
. | Quantity
. | .
. | .
etc. | etc.
|
relationship
(one to many)
What I want to do is:
1) to be able to delete a Customer and automaticaly SQL server delete all the
orders that this customer done from the Orders table.
2) If for some reason the CustomerID changes, SQL should be able to
automaticaly update the necessary fields with the new values in the Orders
table.
Finally, 3) I want to be able to insert a new customer that has an order
and update both the Customers table and Orders table automaticaly. e.g
CustID Name Address ProductID Quantity etc.
------ ---- ------- --------- -------- ----
10-003 John London 33-25 2 ...
Such a kind of insert should add automaticaly the following entries in the
two tables:
Customers Orders
--------- ------
CustID (10-003) CustID (10-003)
Name (John) ProductID (33-25)
Address(London) Quantity (2)
. .
. .
etc. etc.
A friend of mine told me that this can be done using Foreign Check constraints
in SQL server. But I do not know what to do.
Can anybody help me please?
Thank you very much.
Efthymios Kalyviotis
ekalyviotis@comerclub.gr
Check Constraints
May 20, 2002I have a question regarding the use of check constraints. I see how to set it up to make sure a value entered is one of a list using this syntax:
([eft_vc] = 'No' or [eft_vc] = 'Yes')
However, rather than have to hard code the allowable values, I'd like to have them read off another table. The logic would be as follows:
([eft_vc] in (select * from eft_t))
When I try to put this in, I get a message saying that constraints do not support subqueries. Does anyone know of a way around this?
thank you,
Darell
Check Constraints??
Jul 4, 2004Can someone help me with this check constraint. I'm trying to get it runned on MS SQL Server but it seems the syntax isn't correct
check((Derived_Val=0) or ((select count(*) from Stage_One where Task=U_Id and Quantity is null)=0))
Thanx
j2dizzo
Check Constraints
Apr 7, 2005I am Trying to add a check constraint that if the paymenttotal is 0 the column is allowed to have null and if its greater then 0 it is not allow to have null. Here is what I have so far but i get some syntax errors, See if you can see what im doing wrong and how to get this to be valid. Thanks
heres what I got so far
Code:
ALTER TABLE Invoices WITH CHECK
PaymentDate SMALLDATETIME NULL,
CHECK (PaymentTotal = 0)
PaymentDate SMALLDATETIME NOT NULL,
CHECK (PaymentTotal > 0)
I also had this before i changed it to that and I got syntax erros as well but i dunno which is closer.
Code:
ALTER TABLE Invoices [WITH CHECK]
ADD CHECK (PaymentTotal = 0), PaymentDate SMALLDATETIME NULL,
ADD CHECK (PaymentTotal > 0), PaymentDate SMALLDATETIME NOT NULL
Check Constraints
Mar 2, 2006Can someone give me some good examples of check constraints that I can apply to my fields.
For example can I apply a constraint on a name field, at the moment I use one for the date but would like to know many more.
So if anyone has any useful check constraints handy then please tell.
Thanks
Liz
Check Constraints
Apr 11, 2007Hi
I have a field as Releving date in which i enter employee releving date
If i enter date as 11/04/2007.
From that date employee status in master table should be inactive
So that their is no chance for employee to login
for this i don't want to call any procedure or any db object
how can i do this in back end
should i write check constraint(iam not sure of it)
Give solution to this query
Malathi Rao
Check Constraints
Apr 30, 2007What is the best way to establish constraints between two columns in a table
For example (ID1, Date is the primary Key, ID2 can be null sometimes)
ID1EffDateExpDateID2ID2_Location
11/1/200712/31/9999122ABC
21/1/200703/31/2007124XYZ
24/1/200712/31/9999124XYZ1
31/1/200712/31/9999<Null><Null>
I would like to establish a constraint that extablishes one to one relation between ID1 and ID2. Meaning in the above example ID2 =122 should not be assingned to any ID1 other than 1.
(For example, I should not be able to insert another row like
ID1EffDateExpDateID2ID2_Location
41/1/200712/31/9999122ABC)
Beacause this table is maintained in a manual way, sometimes the ID2 which has already been assigned an ID1 is being assigned to another ID1.
What kind of constraint or rule will avoid this scenerio.
Thanks
Raj
Check Constraints
Nov 28, 2007Hello all, here is my problem.
I have an Account table as well as a Bank table. The bank table has a total assets field. There is a foreign key in Account referencing Bank.
What I need is a check constraint that verifies that the total sum of the account balances for a particular bank is less than that banks total assets.
I've been thinking about this one for a while but it's just confusing me. How do I create the expression in the constraint for this? Currently I am using SQL Server Management Studio Express so I'm creating this constraint with the gui.
Any help is appreciated. Thanks!
Check / Unique Constraints
Apr 18, 2001Hello, I want to write a unique constraint that applies to more than one column. What I mean is that the uniqueness should be that if column A is 5 and column B is 3 no other row where A and B has those values can exist.
Do I write this as a check constraint ? Or how do I do it ?
Also, is there anyone who knows some good reading on how to use Link Tables (many to many relations) in MS SQL Server ?
Check Constraints, Triggers
Oct 27, 2000I have a question concerning setting up data integrity checks in SQL Server.
I have a table that lists "Groups" to which an Entity belongs. The Entity can belong to multiple Groups. Every entity has 1 and only 1 of its Groups designated as the "Primary Group". Based on this, my table contains multiple records for each Entity. Each record describes 1 Group of which the Entity is a member. In this record, there is a bit field indicating whether the Group is the "Primary Group".
In other DBMS's I have implemented a check constraint on the "Primary Group" column to enforce the business rule that "a Entity may have one and only one Primary Group". I am aware now, that in SQL Server 7, I must implement this rule as a trigger, or in the client or data services layers.
Does anyone know if SQL Server 2000 will allow me to write such a check constraint?
Check Constraints Or Triggers
Aug 26, 2005Hi, I´m facing teh following situation:This are just sample table names, but should do for discussingpurpouses.Create table Invoice(InvoiceID Integer Not Null,CustomerType Integer Not Null,CustomerCode Integer Not Null,Amount DECIMAL(10,2) Not Null,.................)Create Table Type1Customer(CustomerCode Integer Not Null,...............................)Create Table Type2Customer(CustomerCode Integer Not Null,...............................)I need to add a way to restrict the CustomerType and CustomerCode,in the Invoice table to the correct values.This means that if customerType equals 1 the customerCode should bechecked against Type1Customer and if customerType equals 2 thecustomerCode should be checked against Type2Customer.I succesfully created a check constraint. That ensures that the validvalues exists when the rows in the Invoice table are inserted orupdated, but doesn´t prevent from deleting records from tablesType1Customer and Type2Customer that are referenced from the Invoicetable.Are triggers the only way to go?Thanks in advanceSebastián streiger
View 3 Replies View RelatedProblem With Check Constraints
Jul 20, 2005I am working with an evaluation copy of SQL Server 2000 for the firsttime; my DB experience lies with MS Access.I have a simple table in SQL Server (tblCompany) that has a fieldcalled "Ticker." When new company stock tickers (i.e., MSFT forMicrosoft) are entered into the field, I'd like them in allcaps--whether the user types msft, Msft, MsFt, etc. In Access, thiswas easy--simply set the Format to ">" in table design view.In SQL Server Design Table view, I've clicked on "Manage Constraints"and put the following code in that I found elsewhere:([Ticker] = upper([Ticker]))I then checked all three boxes below: "Check existing data oncreation," "Enforce constraint for replication," and "Enforceconstraint for INSERTs and UPDATEs." The first one, "Check existingdata..." is checked as I've already entered in some data in the fieldin lowercase to see if the check constraint would go back and changeit to Upper Case--this because I'm wanting to ultimately migrate atable from Access to SQL Server and ensure that all Tickers are inUpper Case.I'm able to do this and then save the table design with changes; butevery time, I then go and look at the table data to see if the checkconstraint was applied, and each time it is not; then, I go back to"Manage Constraints" and find that the "Check existing data..." box isunchecked. I've gone through this SEVERAL times.Hoping this is something simple. Apologize for my "newbieness." I'vegot a "For Dummies" book in front of me as well as numerous Internetwindows open, trying to figure this out. Have checked books online onthe MSFT site as well to no avail.Thanks in advance--RAD
View 3 Replies View RelatedReplication Of Check Constraints
Jan 5, 2007I have tables that are replicated using transactional and merge replication. As a result I am unable to use automatic identity management as transactional replication doesn€™t seem to understand it.
Therefore I have implemented a version of the automatic mechanisms that seems to work in a hybrid environment. It is based on a central table that holds the maximum identity for each table that has been issued to date. Valid identity ranges are issued to each publisher and subscriber as needed in a similar way to the automatic mechanisms and tables are reseeded as needed.
I want to enforce the ranges in a similar way to the automatic mechanism using a check constraint similar to this:
alter table [dbo].[test1] with NOCHECK add CONSTRAINT repl_identity_range_48DF13ED_D503_4F5C_AED9_4E504D03E752 check NOT FOR REPLICATION (([id] > 10001 and [id] <= 20001) or ([id] > 50001 and [id] <= 70001))
This works OK on a client subscriber, but if the change is made on the publisher, then the alter statement itself is replicated out to all clients €“ which is not what is wanted. I have traced the automatic mechanisms using profiler and they issue an alter statement as above €“ following dropping of the constraint €“ but the check constraint isn€™t replicated. I can't see how this is achieved.
How do I stop the check constraint being replicated?
The article property schema option can be set to stop replicating check constraints, but this seems to have no effect. If the publication property replicate_ddl is set to 0 then I do see the behaviour that I want. However, I do need to be able to replicate most schema changes due to upgrades etc €“ so this doesn€™t look like a viable option €“ except possibly for the transactional publication.
Any help would be much appreciated
Thanks
aero1
Check Constraints Changed In 6.5->7 Conversion
Sep 8, 2000When our DB was converted from 6.5 to 7, the some column check constraints changed
to table constraints.
Is there a way to change them back, short of rebuilding the table? I can't find a syntax
to add a column constraint without adding a column. Some of the affected tables contain
millions of rows, so I'd rather not rebuild them.
When I create a test table with a column and a table check, I see that in sysconstraints
"colid" and "status" are different, and in sysobjects "info" and "status" are different. I
am leary of tweaking the database catalog though. Heck, this is SQL 7; I don't even
know if these are real tables or mirages.
create table zzzfoo (
myname char(30) check (myname in ('foo', 'bar')),
myfuzz char(30),
check (myfuzz in ('cotton', 'wool', 'linen'))
)
select sc.* from sysconstraints sc, sysobjects so
where sc.id = (select id from sysobjects where name = 'zzzfoo')
and sc.constid = so.id and so.type = 'C'
constid id colid spare1 status actions error
----------- ----------- ------ ------ ----------- ----------- -----------
1380915991 1364915934 1 0 133140 4096 0
1396916048 1364915934 0 0 133156 4096 0
select * from sysobjects
where id in (select constid from sysconstraints
where id = (select id from sysobjects where name = 'zzzfoo'))
name id xtype uid info status base_schema_ver replinfo parent_obj crdate ftcatid schema_ver stats_schema_ver type userstat sysstat indexdel refdate version deltrig instrig updtrig seltrig category cache
-------------------------------------------------------- ----------- ----- ------ ------ ----------- --------------- ----------- ----------- --------------------------- ------- ----------- ---------------- ---- -------- ------- -------- --------------------------- ----------- ----------- ----------- ----------- ----------- ----------- ------
CK__zzzfoo__myname__524F1B17 1380915991 C 1 1 6 0 0 1364915934 Sep 8 2000 4:29PM 0 0 0 C 0 10 0 Sep 8 2000 4:29PM 0 0 0 0 0 0 0
CK__zzzfoo__53433F50 1396916048 C 1 0 4 0 0 1364915934 Sep 8 2000 4:29PM 0 0 0 C 0 10 0 Sep 8 2000 4:29PM 0 0 0 0 0 0 0
TIA
Altering Functions And CHECK Constraints
Jul 23, 2005Let's say I create a multi-statement function like this:CREATE FUNCTION dbo.Test ()RETURNS @res TABLE (N int NOT NULL CHECK (N >= 0))ASBEGININSERT INTO @resSELECT 1RETURNENDThat works fine. Then I make a change in the function's body, replace theCREATE FUNCTION with ALTER FUNCTION, and execute the batch. I get an error:Server: Msg 3729, Level 16, State 3, Procedure Test, Line 9Cannot ALTER 'dbo.Test' because it is being referenced by object'CK__Test__N__5D2E32EB'.Indeed, if I look at the list of dependencies for the function in QA'sobject tree, I can see the check constraint referenced in the errormessage.ALTER FUNCTION works fine if I don't specify the CHECK constraint in thedefinition of the @res table.So it seems that the only way to modify such a function is to drop andrecreate. Is that a known behavior? Is there any particular reason for it?Thanks.--(remove a 9 to reply by email)
View 1 Replies View RelatedDB Design :: Unique And Check Constraints
Sep 3, 2015I have one table like below Test table. My requirement is to create constraints to confirm <g class="gr_ gr_331 gr-alert gr_gramm Grammar only-ins replaceWithoutSep" data-gr-id="331" id="331">uniqueness</g> of STID value 101 with LN.
likeÂ
ID - LN - STID
1 - 'ABC' - 101 Â ---- Valid Row
2 - 'ABC' - 202 --- Valid Row
3 - 'ABC' - 202 --Valid Row (as I want only unique when LN = 'ABC' with STID = 101)
4 - 'ABC' - 101 -- Invalid Row (As I want uniqueness base on LN and STID = 1011)
create table dbo.Test
(
ID int identity,
LN varchar(50),
STID bigint
)
Is this possible with constraints as I don't want to use <g class="gr_ gr_1041 gr-alert gr_gramm Grammar only-ins doubleReplace replaceWithoutSep" data-gr-id="1041" id="1041">trigger</g>.
Adding New Columns With Check Constraints Using Same Batch
Jul 11, 2006I'm using a stored procedure to add fields to an existing table.
These fields must have check constraints and I need to use one T-SQL batch.
In Sql2000 Ok. In Sql2005, if table exists, I get error "invalid column xxxxx" in Add Constraint statement before new column creation.
the code is
Declare @Setup bit
Set @Setup = 1
if @Setup = 1 Begin
--Alter Table MyTable Add MyField Numeric(1, 0) Not Null Default 3
Exec mySp_Add_Column 'MyTable', 'MyField', 'Numeric (1, 0) Not Null', '3'
If IsNull(ObjectProperty(Object_Id('xCK_MyTable_MyField'), 'IsConstraint'), 0) = 0
Alter Table MyTable Add Constraint xCK_MyTable_MyField Check (MyField >= 1 And MyField <= 3)
End Else Begin
-- drop column
End
GO
If MyTable does not exist and, naturally, I add it before of check constraints (using another Sp which add tables) ok.
If I add FK to new fields, ok.
Now I have to split batch in two parts as workaround...
Can anyone tell me if this is a bug or a "fix" for previous versions?
Many thanks,
Giulio
Query Performance On Paritioned Views With Check Constraints
Mar 21, 2007Hi,
I have come across this problem with SQL server both on 2000 and 2005. I am stating an example here.
I have two partitioned tables and a view on top of both tables as below:
create table [dbo].[Table_1]
(
[TableID] INTEGER PRIMARY KEY NONCLUSTERED
CHECK NOT FOR REPLICATION ([TableID] BETWEEN 1 AND 999),
[AnyOtherColumn] int NOT NULL ,
) ON [Primary]
GO
create table [dbo].[Table_2]
(
[TableID] INTEGER PRIMARY KEY NONCLUSTERED
CHECK NOT FOR REPLICATION ([TableID] BETWEEN 1000 AND 1999),
[AnyOtherColumn] int NOT NULL ,
) ON [Primary]
GO
create view TableView
as
select * from Table_1
union all
select * from Table_2
GO
Note the NOT FOR REPLICATION clause on the check constraint on the TableID column.
I then ran the query execution plan for the following query on both SQL server 2000 and 2005.
select * from TableView where TableID = 10
On both the versions the execution plan shows and Index seek on both the tables in the view. This means that my partitioning is not working. If I remove the primary key constraint from the TableID column, the same query on the view shows a table scan on all the underlying tables. This is even worse.
Next, create the same tables and views again, now without the NOT FOR REPLICATION clause on the check constraint as show below:
create table [dbo].[Table_1]
(
[TableID] INTEGER PRIMARY KEY NONCLUSTERED
CHECK ([TableID] BETWEEN 1 AND 999),
[AnyOtherColumn] int NOT NULL ,
) ON [Primary]
GO
create table [dbo].[Table_2]
(
[TableID] INTEGER PRIMARY KEY NONCLUSTERED
CHECK ([TableID] BETWEEN 1000 AND 1999),
[AnyOtherColumn] int NOT NULL ,
) ON [Primary]
GO
create view TableView
as
select * from Table_1
union all
select * from Table_2
GO
Now run the query execution plan for the same query again.
select * from TableView where TableID = 10
This time you would see that it does an index scan only on the first parititon table. This time it proves that the partitioning works.
I would like to know why does the NOT FOR REPLICATION clause in the check constraint make such a huge difference?
Is it a bug in SQL server?
Or am I missing any thing?
Any help appreciated.
Thanks
SQL 2012 :: Check Constraints Have A Definition That Is Longer Than 4000 Characters
Oct 14, 2015I'm putting a process together to run a DBCC CHECKCONSTRAINTS process against copies of client databases.The author application doesn't set the constraints as trusted, and therefore we need to check the integrity of the data.
The problem is that some of the Check constraints have a definition that is longer than 4,000 characters.When this is the case, DBCC CHECK CONSTRAINTS fails.One option is that I write a cursor to select the constraints that have a definition less than 4,000 characters and then call the DBCC command for those particular constraints. However, I'd prefer a more elegant approach - ideally a way to run DBCC CHECKCONSTRAINTS against all constraints regardless of the length of the definition
How Can I Check Variables Comes From Data Flow In Predence Constraints And Conditional Transformation?
May 1, 2008
Hi,
I have Variable , data source and conditional transformation which checks the count(*) if the count == 0 then I connect an script component and change variable to false(initial it is True) and write into a log file...
Then I check that variable on predence constarint at workflow if variable==True then success. BUT
Whenever I run the package my dataflow gets green even the condition does not meet like count==0 . So
my variable's value is "False". Actually if the condition doesnt meet then my script shouldnt work.
Am I missing something???
Database Mirroring Cannot Be Enabled
Mar 13, 2008I am trying to mirror a database and I keep getting the error Msg 1469 saying that "Database mirroring cannot be enabled because the database is an auto close database on one of the partners. Well.. the database properties is saying "false" under auto-close. What else could be wrong?
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Jul 12, 2004Hi all,
I am trying to get a MS Access Database to work on my companies intranet. Everything works fine on my laptop with local file paths. After transferring the files to the web server and changing file paths, I get the 2 following errors.
"Data provider could not be initialized"
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I assume that I am having a problem relinking the database, but unsure of how to do this.
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The file stream containers in those three LUNs reference the same column in the same table.
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Feb 13, 2015I am aware that TDE protects data at Rest and not during communication or data in motion (UNLESS you use Encrypted communication channels using SSL certs etc). Hence I am thinking of doing data export from a TDE encrypted database to a database on the instance where TDE is not enabled or supported. I believe it works and need to take care of relationships between tables.The target database is hosted on SQL 2012 standard edition on which TDE is not supported.
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Sep 23, 2015I have a database that is the publisher in transactional replication and also part of an availability group. I have put the pertinent certificates on all of the involved servers, and it is encrypted on all servers and operated as expected. However, we are adding additional security for personal data and we have targeted columns in multiple tables for column encryption. I have a master key and certificates that are stored in the master database. Following an example where I am to create the database master key:
-- Create database Key
USE encrypt_test;
GO
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'Password123';
GO
But when I try to create a certificate on the database:
-- Create self signed certificate
USE encrypt_test;
GO
CREATE CERTIFICATE Certificate1
WITH SUBJECT = 'Protect Data';
GO
It get the following:
Msg 15151, Level 16, State 1, Line 1
Cannot find the certificate 'Certificate1', because it does not exist or you do not have permission.
Can I add a database certificate to an already TDE enabled database and if not to I create the symmetric key through the certificate located on the master database? And how will that effect decrypting the column values in stored procedures and function on the user database?
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Thanks.
Compact Server Database-file Not Enabled For Replication
Apr 23, 2008When I try to create a subscription to my SQL Server Compact 3.5-database file, it gives an SqlCeException-message that says that the file is not enabled for replication. How do enable it?
My SQL Server Management Studio won´t connect to my compact server file right now, so that method is not an option for me right now.