This is probably a simple answer but I can't find it. I have a table with a column of integers and I want to ensure that when a row is inserted that the value in this column is greater than zero. I could do this on the code side but thought it would be best to enforce it on the table. Thanks! I was in error with my last comment all i...
Hello Consider this example schema: Customer ( int CustomerId pk, .... ) Employee ( int EmployeeId pk, int CustomerId references Customer.CustomerId, .... ) WorkItem ( int WorkItemId pk, int CustomerId references Customer.CustomerId, null int EmployeeId references Employee.EmployeeId, .... ) Basical...
I am trying to create a Basic pay (BP) table with CREATE TABLE bp ( bpid VARCHAR(5), FOREIGN KEY (bpid) REFERENCES designation(desigid), upperlimit DECIMAL(10,2) NOT NULL, lowerlimit DECIMAL(10,2) NOT NULL, increment DECIMAL(10,2) NOT NULL CONSTRAINT llvalid CHECK (upperlimit > lowerlimit) ); As yo...
Does Sql Server ce Suports Check Constraints? I wanted to do something like "ALTER TABLE WITH NOCHECK ADD CONSTRAINT id_range_check CHECK ( BETWEEN and ) and this will give an error on 'WITH' ...
Is there a way to implement a CHECK constraint that checks a value against another value in a different column in the same table? Specifically, I want to ensure that a "checkout" date value to be inserted is greater than the "checkin" date value in the table before inserting the row. I may be missing some details, so please let me know ...
It seems that some scripts generated by Enterprise Manager* (or not, it doesn't matter) created check constraints WITH NOCHECK. Now when anyone modifies the table, SQL Server is stumbling across failed check constraints, and throwing errors. Can i make SQL go through all its check constraints, and check them? Running: sp_msforeachta...
Very quick and simple question. I am running a script to import data and have declared a temp table and applied check constraints to that table. Obviously if the script is run more than once I check whether the temp table already exists and if so, I drop and recreate the temp table. would that also drop and recreate the check constraints...
I have a table that functions as an event log and stores the users signed in state, 'In', 'Out', or 'Rejected' (sometimes users my be 'Rejected' based on external criteria). Here is some sample data so you can get an idea of what the table looks like: Table MyTable PersonID - State - DateTime // data sample 156 - 'Out' ...
Any suggestions on whether fewer check constraints are better, or more? How should they be grouped if at all? Suppose I have 3 columns which are VARCHAR2(1 BYTE), each of which is a 'T'/'F' flag. I want to add a check constraint to each column specifying that only characters IN ('T', 'F') are allowed. Should I have 3 separate check c...
Hi folks, I wish to make sure that my data has a constraint the following check (constraint?) in place This table can only have one BorderColour per hub/category. (eg. #FFAABB) But it can have multiple nulls. (all the other rows are nulls, for this field) Table Schema ArticleId INT PRIMARY KEY NOT NULL IDENTITY HubId TINYINT NOT NU...
Please imagine this small database... Diagram Tables Volunteer Event Shift EventVolunteer ========= ===== ===== ============== Id Id Id EventId Name Name EventId VolunteerId Email Location VolunteerId Phone Day ...
I'm using SQL Server 2008 and I have a table with three columns: Length, StartTime and EndTime. I want to make a CHECK constraint on this table which says that: if Length == NULL then StartTime <> NULL and EndTime <> NULL else StartTime == NULL and EndTime == NULL I've begun to try things like this: Length == NULL AND StartTime <...
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 would one achieve it? ...
I have a SQL Server database with an Apartment table (which has columns FloorNum and BuildingID) and an ApartmentBuilding table (with column NumFloors). Is there any way to set up a constraint (using the SQL Server UI) to check that Apartment.FloorNum is greater than ApartmentBuilding.NumFloors? I tried this: FloorNum > ApartmentBuildi...
I've an entity LearningUnit that has an int primary key. Actually, it has nothing more. Entity Concept has the following relationship with it: @ManyToOne @Size(min=1,max=7) private LearningUnit learningUnit; In a constructor of Concept I need to retrieve the LearningUnit with the greatest primary key. If no LearningUnit exists ...
I have to make a process in Oracle/PLSQL. I have to verify that the interval of time between start_date and end_date from a new row that I create must not intersect other start_dates and end_dates from other rows. Now I need to check each row for that condition and if it doesn't correspond the repetitive instruction should stop and afte...
I have a situation in which I don't want inserts to take place (the transaction should rollback) if a certain condition is met. I could write this logic in the application code, but say for some reason, it has to be written in MySQL itself (say clients written in different languages will be inserting into this MySQL InnoDB table) [that's...
I'm tumbled with a problem! I've set up my first check constraint using MySQL, but unfortunately I'm having a problem. When inserting a row that should fail the test, the row is inserted anyway. The structure: CREATE TABLE user ( id INT UNSIGNED NOT NULL AUTO_INCREMENT, uname VARCHAR(10) NOT NULL, fname VARCHAR(50) NOT NULL, l...
How does one put a CHECK constraint on a column such that its range of acceptable values come from another table, without hardcoding? Here's a simplified example: OneManyTable RoleID TaskID 10 Val1 10 Val2 20 Val1 20 Val2 MetaDataTable pkID Class Value 1 A Val1 2 A Val2 3 B ...
I've had this come up a couple times in my career, and none of my local peers seems to be able to answer it. Say I have a table that has a "Description" field which is a candidate key, except that sometimes a user will stop halfway through the process. So for maybe 25% of the records this value is null, but for all that are not NULL, it ...