Default And Check Constraint Value
Jul 26, 2004Hi,
I need list out the defaulat and constraint value in SQL2K. Where I get those values.
Thanks,
Ravi
ADVERTISEMENT
Check Constraint
Mar 28, 2007Hi I was wodering how to add an OR statment right in the Check Constraint expression.
This is what I am starting with in the database
([zip] like '[0-9][0-9][0-9][0-9][0-9]')
and what I want well not exact but this would answer my question
([zip] like '[0-9][0-9][0-9][0-9][0-9] || [A-Z][A-Z][A-Z][A-Z][A-Z]')
Thanks for any help
Check Constraint
Oct 31, 2000hi, I want to implement a constraint on a talbe for two fields
phone numbers should b (###)###-####
and ss# should be ###-##-####
How can I create such constraint. I tried, but got an error message and could not save the table with the new changes.
Thanks
Ahmed
Check Constraint?
Mar 4, 2004In SQL Server 2000, I want to apply a check constraint on a column type varchar that it is not duplicated. Could someone help me out with this?
Also, should I just make this column the primary key instead of an identity field being the primary key?
What is the performance difference by applying the constraint rather then just making it the primary key?
Mike B
Check Constraint
Mar 22, 2004I have an existing table with field ZIPCODE defined as VARCHAR(5).
I want to add a check constraint to allow only number from 0 to 9.
This is what I did but it gave me error:
alter table test
with check
add constraint ck_test
check (zip between '0' and '9')
error:
ALTER TABLE statement conflicted with COLUMN CHECK constraint 'ck_test'.
The conflict occurred in database 'lahdProperty', table 'test', column 'Zip'.
What did I do wrong. Thanks for your help.
Using Check Constraint
Mar 25, 2008Hi,
I am creating a table in which i want a column to contain only these characters..ie
alphabets from a-z
alphabets from A-Z
numbers from 0-9
and allow characters
@
_ underscore..
.
- hyphen
ie suppose i have table called login..and i have 2 columns in this table named
Loginid LoginName...
So LoginName shuld accept only the above characters.while inserting data into this table..
Kindly help
Check Constraint Help
Nov 14, 2007
Hi, i want to put a check constraint on one of my tables to make sure that a member doesn't get loaded into the same usergroup twice. Could anyone please help me with this.
Here is some sample code:
Code Block
DECLARE @MyTable TABLE (ID INT IDENTITY(1,1), MemberID INT, ClientID INT, UsergroupID INT)
INSERT INTO @MyTable VALUES (123456, 211, 3054) -- Member gets loaded twice
INSERT INTO @MyTable VALUES (123456, 211, 3054)
INSERT INTO @MyTable VALUES (123456, 211, 3055) -- Same Member as the top but into ---- a different usergroup which is correct
INSERT INTO @MyTable VALUES (215489, 376, 2017)
INSERT INTO @MyTable VALUES (987512, 345, 2237)
INSERT INTO @MyTable VALUES (235479, 333, 1158)
INSERT INTO @MyTable VALUES (354985, 333, 1158)
SELECT * FROM @MyTable
The problem i have is that if a member is loaded into the same usergroup twice then the sites crash on the web applications and the member can't get into his profile page.Unfortunately i don't know which one of the 1000 stored procedures are used to access this table so that i could just change the query to SELECT TOP 1.
However i think that it will be better practive to just put a check contraint on the table and avoide the whole problem.
However 1 member can belong to multiple usergroups.
Any help will be greatly appreciated.
Kind Regards
Carel Greaves
Check Constraint
Apr 29, 2008
Hi,
If I diseable a Foreign Key like this:
Alter table table_name nocheck constraint constraint_name
I'm able to insert inconsitent data, then when I restart the contraint like this:
Alter table table_name check constraint constraint_name
the constraint dont check the current integrity of the data,
exist any way, without having to recreate the foreign key, to check the data integrity?
Thanks
Check Constraint
May 15, 2007In our database we have an indexed field that is using unique values, so in the index we turned on the unique property. Now with some changes we made in the application this value can be Null (could not be Null in the past). When we have more as 1 value having value Null we get an exception of unique key violation.
Therefor we want to make an check constraint the checks if the value allready exists when the value is not Null.
Is this possible and how can it be done?
Is DEFAULT A Constraint?
Aug 8, 2006Hi,I see the following in Books Online: CONSTRAINT--Is an optional keywordindicating the beginning of a PRIMARY KEY, NOT NULL, UNIQUE, FOREIGNKEY, or CHECK constraint definition...But I have a table column defined as follows:[MONTH] [decimal] (2, 0) NOT NULL CONSTRAINT[DF__TBLNAME__MONTH__216361A7] DEFAULT (0)My question: Is "DEFAULT" a constraint, or is it called something else?Thanks,Eric
View 2 Replies View RelatedUsing Subquery In CHECK Constraint
Feb 25, 2007Hi,
I am trying to enforce a rule that only one record in a table can have status 'Active'. I'd like to do this with CHECK constraint rather than trigger. I know SQL server doesn't support subqueries such as :
alter table add constraint chk_OnlyOneActive CHECK (1=(select count(*) from mytable where status='Active'))
Is there any workaround for this?
P.S. I tried using UDF like this:
alter table add constraint chk_OnlyOneActive CHECK (dbo.NumActiveRecords()=1)
and it works for insert - I am not able to insert a second "Active" record, but for some reason doesn't work for update - I am able to update existing record to status "Active" and end up with two or more Active records in the table.
Thank you.
? On Check Constraint Expressions
Sep 15, 2004I am creating a check constraint on a field (GRID_NBR) for values between 1 & 99. I am a little confused on creating the expression for it (Books online is vague).
Can I use the following expression: GRID_NBR BETWEEN 1 AND 99
Or do I have to use: GRID_NBR > 0 AND GRID_NBR < 100
Thanks!
Creating Check Constraint
Feb 17, 2004Before adding a record this must check that in the column machine_id not twice the same machines are listed
Can someone help me?
Thanx and cheerz Wim
Check Constraint On Months
May 15, 2008Hi
I have a table with 3 columns in it. The ID column has a datetime data type.
Does anyone know how to apply a check constraint on this field so that the same month cannot be entered twice.
For example the field has the following data in the field
26/04/2008
27/05/2008
26/06/2008
25/07/2008
A user then tries to enter the value 20/05/2008, I would like the check constraint to block this value being entered due to the fact that a item with the same month value has already been entered.
Is this possible?
Thanking you in Advance!!!
Check Constraint Question
May 19, 2008Hi
I have created a table which contains date periods. It has 3 fields all with DateTime data types. These fields being ID, BeginDate, and EndDate. The ID field will hold a date indicating what month the reord is for, ie 01/03/2007 being March or 05/04/2007 being April. The BeginDate will contain the beginnig date for the financial month and EndDate for the financial month.
I am trying to apply a check constraint on the ID field so that combaination of a month and year can only be entered once, ie. if 01/03/2007 already exists in the table then 03/03/2007 cannot.
Is this possible?
Thanking you in advance!
Unique / Check Constraint?
Jun 19, 2008I have a table called tblImages with the following columns:
ImageID [int]
UserID [int]
MainImg [bit]
what i need to ensure is that only one MainImage can be = 1 (true) for each userId at any one time.
any idea what i need to do?
alex
Create CHECK Constraint
Mar 23, 2014I need to create a check constraint for an email column/field, where the field must contain an "@" symbol. Does sql (oracle or SQL in general) let you do this.
1. Tried myself:
ALTER TABLE Q_Customer
ADD CONSTRAINT Q_chk_Cus_email CHECK (Cus_email LIKE '%@%');
...but
ORA-02293: cannot validate (C3267304.Q_CHK_CUS_EMAIL) - check constraint violated
2. Tried from a forum: alter table Q_CUSTOMER
add constraint Q_Chk_cus_email check (Cus_email like '%_@__%.__%')
...but
ORA-02293: cannot validate (C3267304.Q_CHK_CUS_EMAIL) - check constraint violated
Check Constraint Within A Trigger
Aug 7, 2014I want to incorporate a Check constraint within a trigger, based on this but im struggling with the coding.Assuming that is an Alphanumeric field you should be checking what value is in the alphanumeric column from inserted, comparing it with whatever is in the AMGR_User_Fields_Tbl to see if there’s a duplicate and then raising the error...This is my Trigger:
ALTER TRIGGER [dbo].[DUPLICATES]
ON [dbo].[AMGR_User_Fields_Tbl]
FOR INSERT, UPDATE
AS
DECLARE @Alphanumericcol VARCHAR (750)
-- This trigger has been created to check that duplicate rows are not inserted into table.
-- Check if row exists
SELECT @Alphanumericcol
FROM Inserted i, AMGR_User_Fields_Tbl t
[code]....
CHECK And CONSTRAINT Documentation
Jun 4, 2006I am having some difficulties to find the documentation relative to the syntax of CHECK and CONTRAINT in MS SQL Server 2005. Can someone points me toward a reference guide?
Thanks in advance,
Joannès
http://www.peoplewords.com
Check Constraint For 2 Fields
Apr 11, 2007Hi , I have a table that holds CityName and TownName.This table is usually updated and I dont want the same CityName and TownName to be inserted Again.
I have used Primary Key that holds thoose two fields but Primary Key is an index and I know that using check constraint works by spending less performance then indexes .
So , How can I use a check Constraint for two fields ?
Thanks ...
Questoin On Check Constraint
Jun 30, 2007Hi there,
My problem should be fairly simple. Say i have a small table with 2 columns, employee_id and department_id. I want to create a check constraint so that no more than 4 employee_id can be associated with department_id and the user is warned if he/she is trying to do so. Can anyone advise me on how to do it?
Regards,
Kam
Check Constraint - SQL Problem
Jul 23, 2005Hi,I am new to database development and am writing a database as part of auniversity courseI have created a table as below called CableWire - the table is created ok.CREATE TABLE CableWire(CableWireID CHAR(7),BSstandard CHAR(16),Colour VARCHAR(16),Material VARCHAR(16),MetresInStock INTEGER,PRIMARY KEY (CableWireID));However when I try to alter the table by adding a CHECK constraint:ALTER TABLE CableWireADD CHECK (MetresInStock >= 0);I get a pop-up box: "Line: 21SQLSTATE = 37000[Microsoft][ODBC dBase Driver] Syntax error in field definition, Continue?"(line 21 equated to the 2nd of those 2 lines). The syntax seems perfectlyacceptable to me. Any help appreciated.Regards,Mary
View 3 Replies View RelatedParentheses In A Check Constraint
Jun 10, 2007Can we use parentheses in a check constraint in MS-SQL-server DDL?e.g. I'm having a problem with the following statement:ALTER TABLE [dbo].[MyTable] ADD CONSTRAINT [CK_MyTable_TimesDataOK]CHECK (([TimeOn] IS NULL AND [TimeOff] IS NULL)OR([ShiftCode] IS NOT NULL AND [TimeOn] IS NOT NULL AND [TimeOff] IS NOTNULL));The statement appears to run fine, but when I look at my tabledefinition afterwards, it appears that SQL-server ignored theparentheses in my constraint; it shows the constraint expression as:(([TimeOn] IS NULL AND [TimeOff] IS NULL OR [ShiftCode] IS NOT NULL AND[TimeOn] IS NOT NULL AND [TimeOff] IS NOT NULL))My intention is that if there's (non null) data in either of the columnsTimeOn or TimeOff is not null, all three of the columns TimeOn, TimeOffand ShiftCode must have non null data.OK, I realise I could enforce this by altering my table setup in otherways. Right now I'm just trying to figure out if this I'm just upagainst a difference between dialects of SQL in check constraints here.Am I missing something obvious with parentheses?BTW the DDL for the table I'm testing on:CREATE TABLE [dbo].[MyTable]([FNname] [nvarchar](50) NOT NULL,[ShiftDate] [datetime] NOT NULL,[ShiftCode] [nchar](2) NULL,[TimeOn] [nchar](4) NULL,[TimeOff] [nchar](4) NULL);
View 3 Replies View Related'check Constraint' Ignored - PK Violation
Jul 24, 2007I thought the whole point of 'check constraint' being unticked meant you could whack your data straight in no probs.
How can I insert a bunch of historical information where I want to control the PK, in this case DealID?
I have got 'keep identity' checked.
I check the db, the Id does NOT exist currently.
Error: 0xC0202009 at Data Cleansing, Deal Insert [12194]: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005.
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "The statement has been terminated.".
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Violation of PRIMARY KEY constraint 'PK_DealID'. Cannot insert duplicate key in object 'dbo.Deal'.".
How Do I Write This Check Constraint?
Oct 25, 2007
Hi all,
Any advice much appreciated.
I have a table that defines the metadata of some values that will be stored in some generic table somewhere. Here's the table definition:
CREATE TABLE [dbo].[AttributeType]
(
[AttributeTypeID] [int] NOT NULL
, [AttributeTypeName] [nvarchar] (40) NOT NULL
, [AttributeDataType] [nvarchar] (40) NOT NULL CONSTRAINT CK_AttributeDataType_Values CHECK ([AttributeDataType] IN ('NVARCHAR','INT','DECIMAL','DATETIME'))
, [AttributeLength] tinyint NULL
, [AttributePrecision]tinyint NULL
, [AttributeScale] tinyint NULL
, CONSTRAINT CK_AttributeScale_Values CHECK (AttributeScale <= AttributePrecision)
) ON [PRIMARY]
What I want to do is write a constraint (or 4 constraints) that says:
If AttributeDataType = 'nvarchar', AttributeLength cannot be NULL, AttributePrecision must be NULL, AttributeScale must be NULL
If AttributeDataType = 'int', AttributeLength must be NULL, AttributePrecision must be NULL, AttributeScale must be NULL
If AttributeDataType = 'datetime', AttributeLength must be NULL, AttributePrecision must be NULL, AttributeScale must be NULL
If AttributeDataType = 'decimal', AttributeLength must be NULL, AttributePrecision cannot be NULL, AttributeScale cannot be NULL
Is that even possible? I've tried and failed (admittedly not for too long) to fathom a way of doing it.
-Jamie
Check Constraint Question
May 20, 2008Hi
I have created a table which contains date periods. It has 3 fields all with DateTime data types. These fields being ID, BeginDate, and EndDate. The ID field will hold a date indicating what month the reord is for, ie 01/03/2007 being March or 05/04/2007 being April. The BeginDate will contain the beginnig date for the financial month and EndDate for the financial month.
I am trying to apply a check constraint on the ID field so that combaination of a month and year can only be entered once, ie. if 01/03/2007 already exists in the table then 03/03/2007 cannot.
Is this possible?
Thanking you in advance!
Check Constraint To RAISEERROR On 547 16 1
Mar 15, 2008
Hi, I need the T-SQL statement on how to raise a custom error message for a check contraint @au_id '[0-9][0-9][0-9]-[0-9][0-9][0-9][0-9][0-9][0-9]' when ever a client enters the wrong SSN format such as 575-444865. I used the t-sql statement below but does not work when running an insert on the authors table ; au_id column.
CREATE TRIGGER trg_datavalidate
ON authors
FOR INSERT
AS
DECLARE @au_id varchar(11)
DECLARE @err INT
SELECT @err = @@ERROR
from inserted
IF @err = 547
BEGIN
PRINT 'Au_id needs to be in the SSN format xxx-xx-xxxx!. Error Number:'
+ CAST(@err AS VARCHAR)
RAISERROR ('au_id must be in the format of xxx-xxxxxx where x is a number.', -- Message text.
16, -- Severity.
1 -- State.
);
ROLLBACK TRANSACTION
END
Having Issues! Using A UDF In A Check Constraint.
Apr 7, 2008
Hi there. I really hope somebody can point out what's going wrong here..
Firstly, what I'm trying to do is ensure that when a user adds a row to one of my tables, lets call it a WorkDateRange table, that the dates entered never overlap for the same work.
This constraint needs to be created at the same time the Database is created. I'm using a function in the check constraint that is also created when the DB is.
This table will store types of work as an Int along with a start date and an end date for the range. eg. 9999 2008/04/01 2008/04/22, that would be a work type of 9999 and a date range of 2008/04/01 - 2008/04/22. Therefore a user should not be able to enter this as the next row entry, 9999 2008/04/12 2008/04/30, without violating the check constraint. Now thats all good in theory but in practise I just can't get it!
Here is the code I am using:
~first the DB is created~
<now the Function>
CREATE FUNCTION WorkDateRange_CheckDateOverlapping
(
@Work INT,
@Date DATETIME
)
RETURNS BIT
AS
BEGIN
DECLARE @LogicalValue BIT,
@StartDate DATETIME,
@EndDate DATETIME
DECLARE WorkDateRange_Cursor CURSOR FOR
SELECT StartDateRange, EndDateRange
FROM WorkDateRange
WHERE Work = @Work
SET @LogicalValue = 1
OPEN WorkDateRange_Cursor
FETCH NEXT FROM WorkDateRange_Cursor
INTO @StartDate, @EndDate
WHILE @@FETCH_STATUS = 0
BEGIN
SELECT @LogicalValue = CASE WHEN @Date BETWEEN @StartDate AND @EndDate
THEN 0
ELSE 1
END
IF @LogicalValue = 0
BREAK
FETCH NEXT FROM WorkDateRange_Cursor
INTO @StartDate, @EndDate
END
CLOSE WorkDateRange_Cursor
DEALLOCATE WorkDateRange_Cursor
RETURN @LogicalValue
END
GO
<Then the table is created with these columns and these constraints on StartDateRange and EndDateRange>
Columns: [UID] BIGINT, Work INT, StartDateRange DATETIME, EndDateRange DATETIME
CONSTRAINT CHK_StartDateRange CHECK (dbo.WorkDateRange_CheckDateOverlapping(Work, StartDateRange) = 1)
CONSTRAINT CHK_StartDateRange CHECK (dbo.WorkDateRange_CheckDateOverlapping(Work, EndDateRange) = 1)
When I create the database and tables all is successful, but when I try enter rows into the WorkDateRange table, I get a message that my check constraint is violated. But if I copy my code into a separate query and declare the Work and Date variables and assign them the values that would be assigned during the check. I get the desired result of 1, which should be passing the check.
Any help would be greatly appreciated Thanks in Advance.
Changing A BIT To An INT Where There's A CONSTRAINT And A DEFAULT
Jan 2, 2007A few weeks ago a client asked me to add a column to a table so Icreated this script:ALTER TABLE dbo.tblIndividual ADD fldRenewalStatus BIT NOT NULLCONSTRAINT fldRenewalStatus_Default DEFAULT 0Now they want to change it from a BIT to an INT, to store an enum.Fair enough. However, no matter how much I wrangle with a script, Ican't find a reliable way to alter the column. I've mixed and matchedthe following and nothing seems to work:EXEC sp_unbindefault 'tblIndividual.fldRenewalStatus'DROP DEFAULT DF_tblIndividual_fldRenewalStatusALTER TABLE tblIndividualDROP CONSTRAINT fldRenewalStatus_DefaultALTER TABLE tblIndividualDROP COLUMN fldRenewalStatusGOALTER TABLE tblIndividualADD fldRenewalStatus int NOT NULLCONSTRAINT fldRenewalStatus_Default DEFAULT 0Thoughts?ThanksEdward
View 4 Replies View RelatedDefault Constraint Problem
Apr 16, 2008Hello,
I have a table set up called tbl_DailySummary_new. In that table I have a column called €˜RevType€™ char(2) NOT NULL Default €˜00€™. I'm trying to populate this table from another table called tbl_DailySummary. The RevType column in tbl_DailySummary allows null values (and has them). When I attempt to insert all records from tbl_dailysummary into tbl_DailySummary_new, I get the following error message:
Msg 515, Level 16, State 2, Line 1
Cannot insert the value NULL into column 'RevType', table 'TxnRptg.dbo.tbl_DailySummary_new'; column does not allow nulls. INSERT fails.
The statement has been terminated.
Why dosen€™t the default constraint on the RevType column in the new table pick this up?
Thank you for your help!
cdun2
Default Constraint Problem
May 20, 2008
Hi ,
I want to define default constraint for a column to force it to UPPER.
USE [GLP]
GO
ALTER TABLE [dbo].[col1] ADD CONSTRAINT [DF_col1_TypeCode] DEFAULT (N'UPPER(col1)') FOR [col1]. Its defined..
But when I tried ti insert into records..It not convertedto uppecase at all...Isn't it possible this way ?
Thanks,
-V
Restoring A Default Constraint
Apr 28, 2008Troops,
I'm a software developer trying to hack my way thru a SQL script to increase the size of a column. The column has a constraint on it that won't allow the alter unless its dropped.
Alter command:
ALTER TABLE dbo.QueueBack ALTER Column QBQueue varchar(4) NOT NULL
Message response:
Msg 5074, Level 16, State 1, Line 10
The object 'DF__QueueBack__QBQue__76818E95' is dependent on column 'QBQueue'.
Msg 4922, Level 16, State 9, Line 10
ALTER TABLE ALTER COLUMN QBQueue failed because one or more objects access this column.
So, my script drops the default constraint, alters the column size and then adds the constraint back. The problem is that the constraint does NOT appear to be the same as it was prior. I can run the Alter command on the column and it will allow me to change the size of the column... where it prohibited me from doing such before. How do I restore the default constraint so it is exactly the way it was before I dropped it?
Thx,
Stretch
---------------------------------
Script for drop, alter, add... modified slightly for simplicity...
declare @Error int
BEGIN TRAN
SELECT @Error = 0
DECLARE @defname VARCHAR(100), @cmd VARCHAR(1000)
-- this is retrieved at run time from the sysconstraints table; hard-coded here...
set @defname = 'DF__QueueBack__QBCategory'
IF @defname <> ''
BEGIN
SET @cmd = 'ALTER TABLE dbo.QueueBack DROP CONSTRAINT '+ @defname
EXEC(@cmd)
if @@ERROR = -1
BEGIN
SET @Error = -1
END
END
if @Error = 0
BEGIN
-- modify the column
ALTER TABLE dbo.QueueBack ALTER Column QBCategory varchar(7) NOT NULL
if @@ERROR = -1
BEGIN
SET @Error = -1
END
END
if @Error = 0
BEGIN
-- Add the default constraint back
SET @cmd = 'ALTER TABLE dbo.QueueBack ADD CONSTRAINT '+ @defname + ' DEFAULT ('''') FOR QBCategory'
EXEC(@cmd)
if @@ERROR = -1
BEGIN
SET @Error = -1
END
END
if @Error = 0
BEGIN
-- Commit if no error...
COMMIT TRAN
END
ELSE
BEGIN
-- Rollback if error...
ROLLBACK TRAN
END
GO
Check Constraint SQL Server 2005
Nov 2, 2006I want to set up a simple check constraint on a column limiting to values "Yes", "No" and ""I'm trying to use:CONSTRAINT IsAccessToItRestricted_ckcheck (IsAccessToItRestricted in('Yes,'No','');but this is not the right syntax.............. help!
View 1 Replies View Related