A declarative mechanism such as a check or foreign key that enforces some data integrity rule in a database.

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User defined table type with a check constraint

I have a user defined table type where I want to make sure that a certain column is within a given range. This range however is defined in another table. So I thought I can use a check constraint on ...
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113 views

Enforce a constraint problem

This business model is for a case management database. This is closely modeled on the idea of a file folder representing the phase and a sequential checklist representing the stages. A case consists ...
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Postgres 9.3 - deletes terribly slow for 10 minutes after dropping indexes/constraints

If I run a script which drops indexes (17 of them, CONCURRENTLY makes no difference except that without it I get the occasional deadlock), then constraints (20 constraints on 18 tables) and then run a ...
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postgresql multi column unique or check constraint

First a word of pleading. To say I am a newbie to postgresql would be an insult to the newbies! I have been working on this for only a day or so. I have found several questions on this site, and ...
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Dealing with Invisible Referencers

Using Oracle database, suppose I have a parent table parent defined in schema A, and a child table child defined in schema B. To achieve this, schema A granted references privilege on parent to schema ...
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Two different unique constraints for 1 table?

I must enforce uniqueness within my table, But I cannot seem to find anywhere online(mysql manual,forums,stack overflow) talk about two unique constraints within one table. Why you might ask I need ...
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Adding check constraint in Oracle Data Modeller

How can I add a check constraint in data modeller that binds values of one attribute to another? I have two attributes of date type, the entity being the course, one is for start date, the second for ...
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Error adding constraint foreign key to bridge table

Hi there I am fairly new to sql development. I am current following the head first into mysql book and is on chapter 6. On chapter 6 there is a table in third normal form but it does not contains the ...
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CHECK constraint ignored during INSERT SELECT

I have the following 2 tables (simplified): CREATE TABLE dbo.[StagingTable] ( HostName [nvarchar] (max) NULL ,UserName [nvarchar] (max) NULL ,AccountType [nvarchar] (max) NULL ) CREATE TABLE ...
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PostgreSQL Cascade Delete not working

What am I missing here? I have two tables: CREATE TABLE source ( "sourceid" serial, "state" character varying(255) REFERENCES states (state), "leadtime" character varying(255), CONSTRAINT ...
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Why does mysql show Primary key constraint on a View?

As far as I know views cannot have a primary key. However the result of SELECT FROM KEY_COLUMN_USAGE says differ. PRIMARY | S_MOBILE_ITEM_VIEW | ID | ...
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Defacto way of fixing constraint issues without downtime?

I come across two constraint issues all the time (UNIQUE, and referential integrity constraints) within InnoDB. My question is when these issues arise reproducibly what is typically the solution? I'm ...