What is a cluster Key ?

What is a cluster Key ?
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1 Answer

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.
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Related questions

What is cluster key?

Description : What is cluster key?

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

.When can hash cluster used?

Description : .When can hash cluster used?

Last Answer : Hash clusters are better choice when a table is often queried with equality queries. For such queries the specified cluster key value is hashed. The resulting hash key value points directly to the area on disk that stores the specified rows.

When can hash cluster used?

Description : When can hash cluster used?

Last Answer : Hash clusters are better choice when a table is often queried with equality queries. For such queries the specified cluster key value is hashed. The resulting hash key value points directly to the area on disk that stores the specified rows.

What is hash cluster?

Description : What is hash cluster?

Last Answer : A row is stored in a hash cluster based on the result of applying a hash function to the row's cluster key value. All rows with the same hash key value are stores together on disk.

What is index cluster?

Description : What is index cluster?

Last Answer : A cluster with an index on the cluster key.

What is Hash Cluster ?

Description : What is Hash Cluster ?

Last Answer : A row is stored in a hash cluster based on the result of applying a hash function to the row's cluster key value. All rows with the same hash key value are stores together on disk.

What is the purpose of a cluster?

Description : What is the purpose of a cluster?

Last Answer : Oracle does not allow a user to specifically locate tables, since that is a part of the function of the RDBMS. However, for the purpose of increasing performance, oracle allows a developer ... from different tables together for faster retrieval than if the table placement were left to the RDBMS.

What is Index Cluster ?

Description : What is Index Cluster ?

Last Answer : A Cluster with an index on the Cluster Key

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

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

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

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.)

Key Words Used in Oracle

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.

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

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.

What is difference between UNIQUE and PRIMARY KEY constraints?

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.

Can a primary key contain more than one columns?

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

Last Answer : Yes

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

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.

What are the different types of key triggers ?

Description : What are the different types of key triggers ?

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

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

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

Last Answer : No

What is difference between UNIQUE constraint and PRIMARY KEY constraint ?

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.

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

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.

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

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

WHAT IS A KEY FLEXFIELD QUALIFIER?

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.

KEY AND DEXCRIPTIVE FLEXFIELD COMPARISON

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

HOW MANY KEY FLEXFIELDS ARE THERE IN ORACLE FINANCIALS?

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

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

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

Last Answer : Partial Key: It is a set of attributes that can uniquely identify weak entities and that are related to same owner entity. It is sometime called as Discriminator. Alternate Key: All Candidate ... create a unique identifier for the construct is known as creating a compound key. Natural Key:

What is Domain-Key Normal Form?

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.

Can you disable and enable Primary key?

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;

Is the welfare system in your state a complete cluster?

Description : Is the welfare system in your state a complete cluster?

Last Answer : I hope you are joking about buying her a pizza. If she is out of food with 4 kids, I hope you are buying her at least a weeks worth of groceries. Yes, I believe all welfare systems have problems, ... know how to scam the system, so it takes food out of the mouths of those that really need it.

Have you ever been in a situation where someone thought they were being polite, but in reality were creating a cluster of confusion and frustration?

Description : Have you ever been in a situation where someone thought they were being polite, but in reality were creating a cluster of confusion and frustration?

Last Answer : yes this happens all the time with a few family members lol they are way too nice and end up creating a problem at the end all they say is” i am really sorry if this was my fault is there anything i can do to help ” please dont lol

Which is safer on the freeway: Merging into a cluster of tightly packed cars at the cluster's speed of 60 MPH? Or going around the entire cluster at 80 MPH and then pulling into a clear spot?

Description : Which is safer on the freeway: Merging into a cluster of tightly packed cars at the cluster's speed of 60 MPH? Or going around the entire cluster at 80 MPH and then pulling into a clear spot?

Last Answer : answer:What is the speed limit? What kind of roadway? What are the driving conditions? These all play a factor.

Can you tell me how you help ease the pain of a Migraine or Cluster Migraine?

Description : Can you tell me how you help ease the pain of a Migraine or Cluster Migraine?

Last Answer : i work with load animals everyday and always have them. i eat a hersey bar and drink a doctor pepper and take an asprin. works for me

cluster of insect on string beans

Description : cluster of insect on string beans

Last Answer : Need Answer

identify, purple flowers, cluster, California

Description : identify, purple flowers, cluster, California

Last Answer : Need Answer

Cluster of mushrooms die and leave a black spot. What is it and what should we do?

Description : Cluster of mushrooms die and leave a black spot. What is it and what should we do?

Last Answer : When you first see them you need to use funguscide on them. That will kill them...Use gloves to remove them and bag and trash them. Lawn & garden store sells it made up or you mix. ... Keep children & pets away from this area until it is dry. Reread the directions and follow them carefully.

What is the best way to grow green grapes, have only had one cluster two years in a row

Description : What is the best way to grow green grapes, have only had one cluster two years in a row

Last Answer : Need Answer

my peach tree has tons of peaches small inszn still grn should there be a cluster or room to grow brieath?

Description : my peach tree has tons of peaches small inszn still grn should there be a cluster or room to grow brieath?

Last Answer : Make a fist and that is the room that should be allowed between each peach. Lighten the load and there is less chance of a limb breaking off.

What is this tree/weed. Strong smelling white flowers in cluster, thorns

Description : What is this tree/weed. Strong smelling white flowers in cluster, thorns

Last Answer : Sounds invasive. thorns........if you have children, grandchildren or pets, you might want to get rid of this before someone gets injured.

Name the state where the largest wind farm cluster is located ? -SST 10th

Description : Name the state where the largest wind farm cluster is located ? -SST 10th

Last Answer : The largest wind farm cluster is located in Tamil Nadu. (From Nagarcoil to Madurai)

Where is the largest wind farm cluster located in India? -SST 10th

Description : Where is the largest wind farm cluster located in India? -SST 10th

Last Answer : The largest wind farm cluster is located in Tamil Nadu from Nagarcoil to Madurai.

The United States Air Force used what gaming console to create a cluster supercomputer? -Gaming

Description : The United States Air Force used what gaming console to create a cluster supercomputer? -Gaming

Last Answer : US Air Force connects 1,760 PlayStation 3's to build supercomputer. The Condor Cluster consists of 1,760 Sony PlayStation 3's, and is the US Department of Defense's fastest interactive computer.

Is it possible for a star cluster to change it metallicity during time by YSO's appearance? -Space

Description : Is it possible for a star cluster to change it metallicity during time by YSO's appearance? -Space

Last Answer : yes,Since all the stars in a cluster formed at the same time, they are all the same age. A very young cluster will have a HR diagram with a cluster of T-Tauri stars evolving ... The rest become gravitationally bound, meaning they will exist as collection orbiting each other forever. thank you

What does Cluster mean ?

Description : What does Cluster mean ?

Last Answer : Cluster means bunch.

What does Cluster mean ?

Description : What does Cluster mean ?

Last Answer : Cluster means to gather.

Surfacetant molecules can cluster together as micelles, which are colloid sized cluster of molecules. Micelles from only above critical micelle concen

Description : Surfacetant molecules can cluster together as micelles, which are colloid sized cluster of molecules. Micelles from only above critical micelle concen

Last Answer : Surfacetant molecules can cluster together as micelles, which are colloid sized cluster of molecules. ... . `DeltaS` of micelle formation is negative

What where among the chief exports produced by colonists in cluster c?

Description : What where among the chief exports produced by colonists in cluster c?

Last Answer : Need answer

What is the collective noun of cluster of houses in villages?

Description : What is the collective noun of cluster of houses in villages?

Last Answer : Collective noun of a cluster of houses in village

If you are interested in piloting planes driving trucks or steering ships the best career cluster for you might be?

Description : If you are interested in piloting planes driving trucks or steering ships the best career cluster for you might be?

Last Answer : transportation, distribution, and logistics - apex

What is a spherical cluster of stars?

Description : What is a spherical cluster of stars?

Last Answer : That is called a globular cluster.

What is a spherical cluster of stars?

Description : What is a spherical cluster of stars?

Last Answer : That is called a globular cluster.

Cluster headache?

Description : Cluster headache?

Last Answer : DefinitionA cluster headache is one-sided head pain that may involve tearing of the eyes and a stuffy nose. Attacks occur regularly for 1 week to 1 year, separated by long pain-free periods that last at ... , but they appear to be related to the body's sudden release of histamine or serotonin.The fo

What is used to describe a set of data where the measures cluster or concentrate at a point?

Description : What is used to describe a set of data where the measures cluster or concentrate at a point?

Last Answer : The answer depends on the type of distribution for the data. It could be the modal class.