Max Character Limit For Table Check Constraint
Jul 16, 2014What is the maximum character limit for table check constraint . For example
ADD CONSTRAINT [xyz]
CHECK (<how many characters are allowed??>)
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Check Constraint On Character Column
Dec 19, 2007When generating a check constraint to guarantee that a character column cannot be blank is it best to use comparison operators such as col1 <> '' or to use LEN(col1) > 0? Note that the column in marked as not nullable.
View 5 Replies View RelatedTable With Triggers Or Maybe A Check Constraint
May 19, 2013I have a question about a table with triggers or maybe a check constraint.I have the following create tables:
create table bid(
seller char(10) not null,
item_nummer numeric(3) not null,
)
create table Item(
startprice char(5) not null,
description char(22) not null,
start_date char(10) not null,
end_date char(10) not null,
seller char(10) not null,
item_nummer numeric(3) not null,
)
What i'm trying to make is this trigger/constraint: colomn "seller" from table Item will get NULL as long as systemdate is > start_date and end_date, then it will get the value from seller from table bid on the same item_nummer in both table).
Transact SQL :: Database Constraint Check On Table With Reference Key
Jun 11, 2015CREATE TABLE PRODUCT_SALES
(
Salesmanid BIGINT,
Productid BIGINT
)
INSERT INTO PRODUCT_SALES (Salesmanid,Productid) VALUES (1,1)
INSERT INTO PRODUCT_SALES (Salesmanid,Productid) VALUES (1,2)
INSERT INTO PRODUCT_SALES (Salesmanid,Productid) VALUES (1,3)
SELECT * FROM PRODUCT_SALES
/* SalesmanID is reference key from Sales Master and ProductID is reference key from Product Master. How should i restrict user through DB with any constraint check, if user tries to enter
INSERT INTO PRODUCT_SALES (Salesmanid,Productid) VALUES (1,2),
It should throw error , if possible user defined message would be more useful.
Transact SQL :: Check Constraint On Switching In Table Not Working?
Jul 7, 2015I have a table which has been partitioned on BIGINT column.
Partitioned_Table (ID BIGINT, Name VARCHAR(10), Gender VARCHAR(2))
I have a left range partition function on ID column.
CREATE PARTITION FUNCTION Partition_Function ( BIGINT )
AS RANGE LEFT
FOR VALUES ( '20150601000', '20150602000', '20150603000' );
That means the first partition is IDÂ >= 20150601000Â to ID < 20150602000.
 I have to switch in a table into an empty partition.
Switching_In_Table(ID BIGINT, Name VARCHAR(10), Gender VARCHAR(2))
Before the switch in, I am creating a CHECK constraint on Switching_In_Table CHECK(ID LIKE '20150625%') Can I use like clause in this scenario?
SQL 2012 :: Create A Check Constraint Where Another Table Column Value Is Also Involved
Mar 12, 2015Table ATable B
AIDBID
Col 1BCol1
Col 2
Col3
I want to put a check constraint on A.col3 that depends on the values of A.Col1, A.Col2 and B.BCol1
How can I achieve this without using function.
Check Constraint - Compare Sum Of Two Values In One Table Against Values Located In Another Table
Jul 26, 2014I am relatively new to SQL and as a project I have been asked to create the SQL for a simple database to record train details. I want to implement a check constraint which will prevent data from being inserted into a table if the weight of the train is more than the maximum towing weight of the locomotive. FOr instance, I need to add the unladen weight and maximum capacity of each wagon (located in the wagon type table) and compare it against the locomotive maximum pulling weight (the locomotive class table). I have the following SQL but it will not work:
check((select SUM(fwt.unladen_weight+fwt.maximum_payload) from
hauls as h,freight_wagon as fw,freight_wagon_type as fwt,train as t where
h.freight_wagon_serial_number = fw.freight_wagon_serial_number and
fw.freight_wagon_type = fwt.freight_wagon_type and
h.train_number = t.train_number) <
(select lc.maximum_towing_weight from locomotive_class as lc,locomotive as l,train as t where
lc.locomotive_class = l.locomotive_class and l.locomotive_serial_number = t.locomotive_serial_number))
The hauls table is where the constraint has been placed and is the intermediary table between train and freight wagon.
I may not have explained this very well; but in short, i need to compare the sum of two values in one table against a values located in another table...At present I keep getting a message telling me the sub query cannot return more than one row.
255 Character Limit
Mar 28, 2008Hi,
I€™m having a problem with a storedprocedure in SQL Server 2005 Developer Edition: I have declared a varchar(max) variable, but when a try to assign a large string it gets truncated to 255 characters, I get the same result if a declare the variable with varchar(8000), ¿can someone help me fix this?, I don€™t need the full 8000 characters, but I need more that just 255.
Thanks.
Excel 255 Character Limit :(
Aug 8, 2006I am using VB.NET / SQL to extract data from an Excel spreadsheet and insert it (via a dataset) into an SQL database.
My SQL select to form the dataset is:
Select 0, '01/01/1905', '00:00' , 'Description: ' + [DESCRIPTION] + '<br/><br/>Type: ' + [Field5] + '<br/> Thankyou' As Description From [Primary Schools$]
I am using Jet for the connection, the connection string is:
sExcelConnect = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Path ofile.xls;Extended Properties=""Excel 8.0;HDR=Yes;IMEX=1"""
My problem is that, although Description and Field5 themselves are not above 255 characters, the combination of the two, plus my own text do come out as more than 255 characters and as such get truncated.
I have tried using cast and nested selects, but to no avail.
Any body got any ideas ?
Datatype Character Limit
Feb 7, 2007I am trying to store long text so I gave the field in question the TEXT datatype. But it only lets me store 1023 characters. I was expecting (but not quite needing) 2,147,483,647 characters when using the TEXT datatype. Can some one point out what I am missing.
Great forum, my first post, ahhh....
I will continue to search the forum for my answer. Thank you for taking the time to read this.
John
...uh, something like that...
The 4000 Character Limit For Expressions
Apr 4, 2006I am building rather large SQL statements using expressions and I am about to hit the 4000 character limit. First, what were the reasons for setting such a low limit? With it in place you are forced to come up with other solutions, but perhaps that was the intention.
Speaking of limits, what are the limits for storing a value in a string that is defined in a package configuration file? What are the limits when creating a string within a script task and then use it to set a string variable in the package? What are the limits when using a string value as an input parameter to an Execute SQL Task using OLE DB? Do these differ depending on the connection type?
I guess I'm getting a bit paranoid about limits, but I don't want to hit any others late in the design.
Regards,
Lars
Support Asian Character And Connect Limit
Mar 15, 2006Do MS SQL Express support Asian character set?
If I want to input Traditional Chinese character, what collation I should use?
Is there any limitation on the no of connect to MS SQL Express?
Character Limit For Variables Inside A Stocked Procedure
Feb 23, 2007I am currently having a problem where my SQL server seems to lock any variables to 1000 characters (ie. varchar(8000) can only hold 1000)I have read in numerous sources it was possible to change that limit so the varchar can truly hold the 8000 characters and not stop at 1000, but there was no info on how to do this.I am looking for a "How to" to put this limit to 8000.Thank you!
View 10 Replies View RelatedNeed Workaround For 4000-character Limit On CLR Sproc Parameters
May 11, 2007I've written a managed (C#) stored procedure with the following signature:
[Microsoft.SqlServer.Server.SqlProcedure]
public static void Sproc(string startDate, string endDate, string idList)...
Sometimes when I call this sproc, my comma-separated list of IDs exceeds 4000 characters. How can I get around this problem?
I guess I need something equivalent to NVarchar(MAX), but for CLR sprocs instead of TSQL.
Any thoughts?
When Changing To Type Text From Nvarchar, The 255 Character Limit Is Maintained?
Jul 23, 2005Hi - I am changing a field from type nvarchar to type text, given thatI need to store strings longer than 255 characters. To do this Ichange the data type in SQL Server, then I change the parameter code inthe calling procedure, as per below:cmd.Parameters.Append(cmd.CreateParameter("@title", adVarWChar,adParamInput, 255, title));becomes:cmd.Parameters.Append(cmd.CreateParameter("@title", adLongVarWChar,adParamInput, 1073741823, title));However, when I do this, for some reason, the field is still limited to255 characters - when I try to update the field with 256 characters,the error 'Application uses a value of the wrong type for the currentoperation.' occurs.Why is this? I've checked that the correct data is contained in theparameter. When I look at the data in the database, the column inquestion shows the content, whereas the next column, which has alwaysbeen of type text, shows '<LongText>' - does this mean anything? Do Ineed to do something special to convert the column from nvarchar totext?Many thanks,Iain
View 1 Replies View RelatedCheck 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?
Using 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.
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
? 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