You can copy tables, data, stored procedures, referential integrity constraints, security, and indexes. Choose the object(s) to copy.
It had good ANSI SQL support, referential integrity, and good performance as long as the number of concurrent accesses didn't grow too large.
Do not include any clauses defining declarative referential integrity constraints.
Used to verify a certain condition (insure that a scalar subquery returns one row, validate referential integrity, etc).
For example, this might happen when two ore more of the tables in the MQT have a referential integrity relationship defined and the join predicate is on their primary key - foreign key columns.
, do not allow update to occur when it violates the referential integrity.
Jazz enforces referential integrity between an item and its helper objects, but not between items; i.e., dangling item references are allowed.
Copy tables, data, stored procedures, referential integrity constraints, security, and indexes. Specify the object(s) to copy.
Primary key, referential integrity, and check constraints.
In reality, it's up to you to decide whether you want your classes to maintain strict referential integrity (in other words, have all deletes cascade) or to allow a looser relationship.
The data volumes in data warehouse databases make traditional referential integrity constraints too costly.
If the line appears solid, the DBMS enforces referential integrity for the relationship when rows are added or modified in the foreign-key table.
As long as there is no other way to update wells_pts (that is, you must revoke privileges from all other users), referential integrity is guaranteed.
國文精選館
