A constraint is a condition that has to be fulfilled in a given context.
I'm creating a simple form that stores entered data in an extremely simple Oracle database table via a Java Servlet …
oracle jdbc primary-key constraints ora-00001I am using Magento CE 1.6.2 and I have a problem with my reindexer ( the url_rewrite ) php shell/indexer.php …
magento pdo duplicates constraints zend-dbI want to add a column to a table, then add a check constraint to make sure its greater than 0. …
sql oracle11g constraints alterI am trying to create a composite foreign key relationship/constraint. All tables are empty. I have this table: CREATE …
tsql foreign-keys constraints composite-keyThis is going to sound like a crazy request. The databases that I report from do not have any foreign …
tsql sql-server-2000 constraints information-schemais there some 'where' type contraints in can add to make the follwing code compile ? public class Plus<T&…
c# generics constraintsOn a oracle database I have a foreign key, without knowing its name, just the column_name and the reference_…
sql oracle constraints sql-dropHere's a little experiment I ran in an Oracle database (10g). Aside from (Oracle's) implementation convenience, I can't figure out …
oracle null nullable constraints unique-indexI am using PostgreSQL and would like to prevent certain required CHARACTER VARYING (VARCHAR) fields from allowing empty string inputs. …
postgresql constraints varcharWhat is the difference between using constraints and rules in SQL, preferably SQL server 2008 R2. Can anyone explain and demonstrate …
sql sql-server constraints business-rules