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Questions tagged [check-constraints]

CHECK constraints enforce domain integrity by limiting the values that are accepted by one or more columns.

SQL CHECK constraints enforce domain integrity by limiting the values that are accepted by one or more columns.

You can create a CHECK constraint with any logical (Boolean) expression that returns TRUE or FALSE based on the logical operators. For example, the range of values for a salary column can be limited by creating a CHECK constraint that allows for only data that ranges from $15,000 through $100,000. This prevents salaries from being entered beyond the regular salary range. The logical expression would be the following: salary >= 15000 AND salary <= 100000.

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SqLite.js Uncaught Error: CHECK constraint failed

I am trying to insert values in a table in SQLite but getting SqLite.js Uncaught Error: CHECK constraint failed: st . I am unable to find any of the errors. Can someone help to figure the error out? Here is my create table statement: CREATE…
JAMSHAID
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Please explain the syntax the SQLServer uses to create a check constraint

When I right click on a default constraint and I ask SQL Server to create a CREATE script for it, it generates the following code: ALTER TABLE [dbo].[tblEventTurnJudgeStartValues] WITH NOCHECK ADD CONSTRAINT…
Seth Spearman
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Check for integrity constraint violation in SQL before deletion

My question is sort of similar to this one I want to check if a DELETE query will fail because of a constraint violation. I'd like to do this on database level because I think letting it fail and catching the error is ugly. Another option is…
Niels Bom
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Constraints in SQL Database

I need to have a table in T-SQL which will have the following structure KEY Various_Columns Flag 1 row 1 F 2 row_2 F 3 row_3 T 4 row_4 F Either no…
DACN
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Case sensitivity check constraint with LIKE operator using character range wildcards

I'm facing a problem in regular expressions case sensitivity. In a regular expression expression only the first item works within the square brackets. create table ( FlowerId varchar(7) constraint chk_flid_regex check(ActorId…
Devi
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Minizinc: output for five days,there is a better flexible way?

I have to extend the output and the solution of my project (make an exams scheduling): -Extend the structure to five days (I have always worked on one day): I thought about moltiply the number of days for slotstimes (5*10) and then I tune the…
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SQL CHECK constraint issues

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…
Deniz Dogan
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Is it possible to a db constraint in for this rule?

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…
Pure.Krome
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PostgreSQL Check Constraint to Only Allow One of Two Booleans to be True

Given: CREATE TABLE my_table ( my_table_id serial NOT NULL PRIMARY KEY, flag_one boolean NOT NULL, flag_two boolean NOT NULL ); Is there a way to create a check constraint to ensure that flag_one and flag_two cannot both be true? Both…
Paul Croarkin
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Comparing long data type with varchar data in oracle

Consider following scenario : CREATE TABLE test ( name VARCHAR2(50), type LONG, CONSTRAINT c_type CHECK (type IN ('a', 'b', 'c', 'd', 'e', 'f')) ); I want to alter constraint c_type and add a new type in check constraint say 'g'. Now to…
eatSleepCode
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sqlalchemy constraint on a boolean column

I have a table with 3 columns A(, B, C) and have 2 constraints A and B should be jointly unique which I have done by defining a unique constraint. For any given value in A, there can be only one True in C. (A, C=True) has to be unique. I need…
Madhulika
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CHECK CONSTRAINT in Oracle SQL

I have the following table Goods_In_Wagon(Goods_ID,Wagon_ID,Total_Weight). I need to create a number of if statement check constraint that says "IF WAGON_ID is between 90 and 99 THEN Total_Weight must be greater than 10." AND "IF WAGON_ID is between…
Almanzt
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OCL constraints checking on Eclipse Papyrus

Does anyone manage to check OCL constraints on a class diagram modeled in Eclipse Papyrus ? I have definied a simple test profile with only one constraint on a stereotype attribute : {OCL} self.property > 0 The stereotype extends the Property…
Vincent
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Check constraint in SQL Server 2008

Please, I just starting to learn SQL and got stuck. I'm trying to build a database for my test project, I've created some tables, did the relations, defined primary and foreign keys.....all of this in SQL Server 2008 through Visual interface (table…
Nobot
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Mandatory participation of table in relationship in Postgres

What is the best way to represent mandatory participation in Postgres? I used to do it with CHECK constraint or with INSERT and DELETE TRIGGER in Sybase. Postgres does not support subqueries in CHECK constraint and I cannot get triggers right. I…
Radovan Luptak
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