check-constraints Questions
1
I am trying to build a simple hotel room check-in database as a learning exercise.
CREATE TABLE HotelReservations
(
roomNum INTEGER NOT NULL,
arrival DATE NOT NULL,
departure DATE NOT NULL,
gu...
Leonard asked 11/2, 2017 at 1:29
4
Solved
I have table designed in SQL-Server 2008 R2.
I have a column in that table which needs to be checked against another table when data is inserting.
ALTER TABLE Table1
WITH CHECK ADD CONSTRAINT C...
Rossner asked 21/10, 2012 at 18:15
2
My query :
INSERT into PriceListRows (PriceListChapterId,[No])
SELECT TOP 250 100943 ,N'2'
FROM #AnyTable
This query works fine and the following exception raises as desired:
The INSERT s...
Egor asked 10/10, 2015 at 13:56
3
Solved
I'd like to see the ability to attach custom error messages to CONSTRAINT objects, specifically CHECK constrints. Either directly or via a custom error number in sysmessages.
I've seen developers ...
Interaction asked 30/11, 2011 at 5:40
1
Solved
We have a weird situation on a table in an Oracle database where dropping a column results in changing the default values of another column. Here's the scenario.
I have my table with some sample ...
Mcgrew asked 29/9, 2015 at 15:0
1
I'm trying to perform data validation on a table, and I need to check across multiple rows and columns. Basically I want to make sure that for any given tool, at least one version exists that is fl...
Notable asked 23/8, 2013 at 15:46
6
Solved
What SQL databases, if any, support subqueries in CHECK constraints?
At present and as far as I know, Oracle, MySQL, and PostgreSQL do not.
EDIT
(Clarification based on initial answers.) I'm loo...
Aiglet asked 1/6, 2011 at 3:14
2
Solved
I have a table with 4 columns:
create table dbo.Table (
Id int not null,
A int null,
B int null,
C nvarchar (4000) null
)
How can I make sure that A, B and C are all three null or all thre...
Amphiaster asked 24/4, 2015 at 11:34
3
Solved
i'v been learning SQL for the last week but I am unsure how to correctly add a case statement within a check constraint. Can anybody give me any pointers?
I have the following grade table:
CREATE...
Leonteen asked 26/1, 2015 at 20:26
3
I've a user table with unique user_id. User can register using there id. Now I want to limit the max. registration per user using CHECK constraints. so I use this:
.... CHECK(select count(user_id)...
Dose asked 31/10, 2014 at 17:0
1
Solved
create table test (
col1 varchar(20),
col2 varchar(20)
)
When col1 has value '1', col2 cannot be null.
When col1 has any other value, col2 can be null.
Is there a way to write a check const...
Powel asked 25/5, 2014 at 6:2
4
Solved
Can a Check Constraint (or some other technique) be used to prevent a value from being set that contradicts its prior value when its record is updated.
One example would be a NULL timestamp indica...
Corporate asked 16/1, 2013 at 20:34
1
If we have a giant fact table and want to add a new dimension, we can do it like this:
BEGIN TRANSACTION
ALTER TABLE [GiantFactTable]
ADD NewDimValueId INT NOT NULL
CONSTRAINT [temp_DF_NewDimValu...
Overalls asked 23/10, 2013 at 18:37
1
Solved
I have a table with 60 columns. 20 of those are "NotEmpty" and 6 "NotNull".
I have empty values and Null values (which always mean "no data" in my case). I'd like to u...
Gentle asked 2/10, 2013 at 13:15
1
Solved
I want to add a field-level validation on a table. There is a field named "account_number" and this field should always pass a "luhn" check. I've found a function called "luhn_verify" that seems to...
Antipas asked 23/8, 2013 at 18:56
3
Solved
I have a table with 4 columns:
(ID (PK, int, NOT NULL), col1 (NULL), col2 (NULL), col3 (NULL))
I'd like to add a CHECK constraint (table-level I think?) so that:
if col1 OR col2 are NOT NULL then ...
Toth asked 9/8, 2013 at 12:11
2
Solved
I'm trying to impose a @Oneto7 association. I'd have imagined an attribute that specifies the target many value, but have found none.
If there is no such attribute, how else, in JPA/EclipseLink wo...
Quinquefid asked 24/4, 2010 at 19:0
2
Solved
Take the following example table:
CREATE TABLE [dbo].[tbl_Example](
[PageID] [int] IDENTITY(1,1) NOT NULL,
[RequireLogin] [bit] NOT NULL,
[RequireAdmin] [bit] NOT NULL,
[HideIfLoggedIn] [bit] ...
Kristenkristi asked 10/3, 2013 at 23:40
1
Solved
I am trying to create a table where the values in one column can't be greater than the next column over. For example, I am creating the following table.
CREATE TABLE Price (
PriceID INT PRIMARY K...
Soll asked 15/11, 2012 at 1:57
3
Solved
I created a table called test with column called code:
create table test(
code char(3) not null);
I then populated the table with the following data:
insert into test values ('A12');
insert in...
Intellectual asked 27/9, 2012 at 12:52
2
Solved
Does MySQL support check constraint?
I am able to execute the following script in MySQL without error.
ALTER TABLE EMP_DB_DESIGN_EXCEL ADD (
CONSTRAINT CHK_EMP_IS_ACTIVE CHECK (IS_ACTIVE I...
Harty asked 5/8, 2010 at 11:58
3
The following conditional constraint simply doesn't work. Is it possible to formulate in a working way?
ALTER TABLE eni_trasc_voci_pwr_fatt
ADD CONSTRAINT tvp_constraint_1 CHECK (
CASE WHEN TVP_CO...
Decennary asked 23/5, 2012 at 8:19
7
Solved
I have a situation where a table has three columns ID, Value and status. For a distinct ID there should be only one status with value 1 and it should be allowed for ID to have more then one status ...
Subinfeudation asked 20/10, 2011 at 20:13
2
Solved
Imagine that I have a table with integer columns Col1, Col2, Col3, Col4. Each column is nullable and a valid row must contain a value in exactly 1 columns (i.e. all nulls is invalid and more than 1...
Tonga asked 24/8, 2011 at 10:45
1
Solved
given the following sample table structure is there a way to add to a unique constraint to insure uniqueness for (GUID, 'Y') combination?
Application logic - update by guid generates a new versio...
Kibitzer asked 12/7, 2011 at 16:57
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