What are the Referential actions supported by FOREIGN KEY integrity constraint ?

1 Answer

Answer :

UPDATE and DELETE Restrict - A referential integrity rule that disallows
the update or deletion of referenced data. DELETE Cascade - When a
referenced row is deleted all associated dependent rows are deleted.

Related questions

Description : What are the Referential actions supported by FOREIGN KEY integrity constraint?

Last Answer : UPDATE and DELETE Restrict – A referential integrity rule that disallows the update or deletion of referenced data. DELETE Cascade – When a referenced row is deleted all associated dependent rows are deleted.

Description : In RDBMS, the constraint that no key attribute (column) may be NULL is referred to as: (A) Referential integrity (B) Multi-valued dependency (C) Entity Integrity (D) Functional dependency

Last Answer : (C) Entity Integrity

Description : Can Check constraint be used for self referential integrity ? How ?

Last Answer : ? Yes. In the CHECK condition for a column of a table, we can reference some other column of the same table and thus enforce self referential integrity.

Description : . ………………… is a special type of integrity constraint that relates two relations & maintains consistency across the relations. A) Entity Integrity Constraints B) Referential Integrity Constraints

Last Answer : B) Referential Integrity

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Last Answer : (A) Integrity constraint

Description : Give two examples of referential integrity constraints.

Last Answer : rential integrity constraints.

Description : Describe Referential Integrity ?

Last Answer : A rule defined on a column (or set of columns) in one table that allows the insert or update of a row only if the value for the column or set of columns (the dependent value) matches a value ... data and the action to be performed on dependent data as a result of any action on referenced data.

Description : What is Referential Integrity ?

Last Answer : Maintaining data integrity through a set of rules that restrict the values of one or more columns of the tables based on the values of primary key or unique key of the referenced table.

Description : How can you Enforce Referential Integrity in snapshots ?

Last Answer : Time the references to occur when master tables are not in use. Peform the reference the manually immdiately locking the master tables. We can join tables in snopshots by creating a complex snapshots that will based on the master tables.

Description : What is an Integrity Constraint ?

Last Answer : Integrity constraint is a rule that restricts values to a column in a table.

Description : Which if the following is not the type of data integrity. A) Key integrity B) Domain integrity C) Entity integrity D) Referential integrity

Last Answer : A) Key integrity

Description : If an unique key constraint on DATE column is created, will it validate the rows that are inserted with SYSDATE ?

Last Answer : It won't, Because SYSDATE format contains time attached with it.

Description : What is difference between UNIQUE constraint and PRIMARY KEY constraint ?

Last Answer : A column defined as UNIQUE can contain Nulls while a column defined as PRIMARY KEY can't contain Nulls.

Description : • Describe Referential Integrity?

Last Answer : A rule defined on a column (or set of columns) in one table that allows the insert or update of a row only if the value for the column or set of columns (the dependent value) matches a ... data and the action to be performed on dependent data as a result of any action on referenced data.

Description : Drop Table cannot be used to drop a table referenced by a …………… constraint. A) Local Key B) Primary Key C) Composite Key D) Foreign Key

Last Answer : D) Foreign Key

Description : Drop Table cannot be used to drop a Table referenced by .................. constraint. (a) Primary key (b) Sub key (c) Super key (d) Foreign key (A) (a) (B) (a), (b) and (c) (C) (d) (D) (a) and (d)

Last Answer : (C) (d)

Description : How many Integrity Rules are there and what are they

Last Answer : There are Three Integrity Rules. They are as follows :: a) Entity Integrity Rule :: The Entity Integrity Rule enforces that the Primary key cannot be Null b) Foreign Key Integrity Rule :: ... Intigrity rule is about the complex business processes which cannot be implemented by the above 2 rules.

Description : Where the integrity constraints are stored in Data Dictionary ?

Last Answer : The integrity constraints are stored in USER_CONSTRAINTS.

Description : How will you a activate/deactivate integrity constraints ?

Last Answer : The integrity constraints can be enabled or disabled by ALTER TABLE ENABLE constraint/DISABLE constraint.

Description : What is an Integrity Constrains ?

Last Answer : An integrity constraint is a declarative way to define a business rule for a column of a table.

Description : What is Authorization and Integrity manager?

Last Answer : It is the program module, which tests for the satisfaction of integrity constraint and checks the authority of user to access data.

Description : Define the “integrity rules”

Last Answer : There are two Integrity rules. ∙ Entity Integrity: States that “Primary key cannot have NULL value” ∙ Referential Integrity: States that “Foreign Key can be either a NULL value or should be Primary Key value of other relation.

Description : what are the datatypes supported By oracle (INTERNAL)?

Last Answer : Varchar2, Number,Char , MLSLABEL.

Description : What are the sql clauses supported in the link property sheet?

Last Answer : Where start with having.

Description : Write any one similarity and one difference between primary key and unique Constraint. -Technology

Last Answer : Similarity: Column with both the constraints will only take unique values.Difference: Column with Primary key constraints will not be able to hold NULL values while Column with Unique constraints will be able to hold NULL values.

Description : Write any one similarity and one difference between primary key and unique Constraint -Technology

Last Answer : Similarity: Column with both the constraints will only take unique values.Difference: Column with Primary key constraints will not be able to hold NULL values while Column with Unique constraints will be able to hold NULL values.

Description : What are the key components in the "Triple constraint Triangle"?  A. Scope, Schedule, Cost, Project Manager B. Scope, Time, Cost, Project (Ans.) C. Time, Money, Scope, Project D. Project Manager, Time, Scope, Money

Last Answer : B. Scope, Time, Cost, Project (Ans.)

Description : What is difference between UNIQUE constraint and PRIMARY KEY constraint?

Last Answer : A column defined as UNIQUE can contain Nulls while a column defined as PRIMARY KEY can’t contain Nulls. 47.What is Index Cluster? – A Cluster with an index on the Cluster Key 48.When does a Transaction end? – When it is committed or Rollbacked.

Description : Can you pass values to-and-fro from foreign function ? how ?

Last Answer : Yes . You obtain a return value from a foreign function by assigning the return value to an Oracle Forms variable or item. Make sure that the Oracle Forms variable or item is the same data type as ... SQL data type; it must also be the appropriate parameter type as defined in the PL/SQL interface.

Description : what are key-mode and locking mode properties? level ?

Last Answer : Key Mode : Specifies how oracle forms uniquely identifies rows in the database.This is property includes for application that will run against NON-ORACLE datasources . Key setting unique (default.) ... locks on rows that correspond to queried records in the form. a) immediate b) delayed

Description : What is the difference between candidate key, unique key and primary key

Last Answer : Candidate keys are the columns in the table that could be the primary keys and the primary key is the key that has been selected to identify the rows. Unique key is also useful for identifying the distinct rows in the table.)

Description : Key Words Used in Oracle

Last Answer : The Key words that are used in Oracle are :: a) Commiting :: A transaction is said to be commited when the transaction makes permanent changes resulting from the SQL statements. b) Rollback :: ... A Process is a 'thread of control' or mechansim in Operating System that executes series of steps.

Description : What is difference between UNIQUE and PRIMARY KEY constraints?

Last Answer : A table can have only one PRIMARY KEY whereas there can be any number of UNIQUE keys. The columns that compose PK are automatically define NOT NULL, whereas a column that compose a UNIQUE is not automatically defined to be mandatory must also specify the column is NOT NULL.

Description : Can a primary key contain more than one columns?

Last Answer : Yes

Description : What is the difference between a Function Key Trigger and Key Function Trigger ?

Last Answer : Function key triggers are associated with individual SQL*FORMS function keys You can attach Key function triggers to 10 keys or key sequences that normally do not perform any SQL * FORMS operations. These keys referred as key F0 through key F9.

Description : What are the different types of key triggers ?

Last Answer : Function Key Key-function Key-others Key-startup

Description : Is a Key startup trigger fires as result of a operator pressing a key explicitly ?

Last Answer : No

Description : What is cluster key?

Last Answer : The related columns of the tables in a cluster are called the cluster key.

Description : What is a cluster Key ?

Last Answer : The related columns of the tables are called the cluster key. The cluster key is indexed using a cluster index and its value is stored only once for multiple tables in the cluster.

Description : HOW MANY SEGMENTS ARE THERE IN THE KEY FLEXFIELD(S) IN ORACLE GENERAL LEDGER?

Last Answer : - Oracle GL Key flexfield can have 15 columns each representing a segment. However, the segments type can be:  Cost Center segment  Balancing segment  Account segment  Intercompany segment

Description : WHAT IS A KEY FLEXFIELD QUALIFIER?

Last Answer : - A qualifier is a label attached to a particular key flexfield segment so it can be located by the application requiring its information. A key flexfield qualifier can be of 2 types: · Flexfield qualifiers identify a segment in a flexfield. · Segment qualifiers identify a value set in a segment.

Description : KEY AND DEXCRIPTIVE FLEXFIELD COMPARISON

Last Answer : KEY FLEXFIELD DESCRIPTIVE FLEXFIELD  Owned by one application; used by many Associated with tables in a specific ... Identifies entities Captures additional information only

Description : HOW MANY KEY FLEXFIELDS ARE THERE IN ORACLE FINANCIALS?

Last Answer : · General Ledger o Accounting Flexfield · Assets o Asset Key Flexfield o Location Flexfield o Category Flexfield · Service o Service Item Flexfield · Receivables o Territory ... Inventory o Item Categories o System Items o Sales Orders o Item Catalogs

Description : What are partial, alternate,, artificial, compound and natural key?

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Description : What is Domain-Key Normal Form?

Last Answer : A relation is said to be in DKNF if all constraints and dependencies that should hold on the the constraint can be enforced by simply enforcing the domain constraint and key constraint on the relation.

Description : Can you disable and enable Primary key?

Last Answer : You can use the ALTER TABLE statement to enable, disable, modify, or drop a constraint. When the database is using a UNIQUE or PRIMARY KEY index to enforce a constraint, and constraints associated ... and any FOREIGN KEY constraints that depend on it: ALTER TABLE dept DISABLE PRIMARY KEY CASCADE;

Description : What two actions of Andrew Jackson that supported Indian removal?

Last Answer : food and water make a baby of the camal movment

Description : Do you enjoy self referential or self-denying loops?

Last Answer : Pulling the rug out from under me will cause me to slit my own throat!