Examples of using Clustered index in English and their translations into German
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Colloquial
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Official
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Ecclesiastic
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Medicine
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Financial
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Ecclesiastic
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Political
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Computer
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Programming
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Official/political
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Political
Retrieves a single row from a clustered index.
Adding a clustered index to a heap table actually drops the heap structure.
SQL Server supports clustered index optionally.
The total length limit is 1700 Bytes 900 Bytes for clustered indexes.
A clustered index(SQL Server, MySQL/InnoDB) is a table stored in an index B-Tree structure.
You have a free choice between clustered indexes and heap-tables.
If a clustered index already exists,the option to add a clustered index is disabled.
The MyISAM storage engine doesn't support clustered indexes and uses heap-tables all the time.
The Oracle database calls this concept index-organized tables(IOT),other databases use the term clustered index.
To avoid rebuilding indexes, drop the nonclustered indexes first and the clustered index last.
Analogous to a regular index, a so-called secondary index refers to theoriginal table data-which is stored in the clustered index.
Database support for index-organized tables and clustered index is very inconsistent.
By default SQL Server uses clustered indexes(index-organized tables) using the primary key as clustering key.
DB2 doesn't have index-organized tables but uses the term"clustered index" for a different feature.
The possibility to create a Nonclustered Columnstore Index in addition to the Clustered Index does not only save Indexes, but with a smartly applied filter the Index-Overhead can also be avoided that would otherwise affect the actually more important inserts.
This results in two benefits:(1) it saves the space for the heap structure;(2)every access on a clustered index is automatically an index-only scan.
A secondary index is an index that refers to a clustered index(SQL Server, MySQL/InnoDB) or Index-Organized Table Oracle.
That means that accessing a table via a secondary index searches two indexes: the secondary index once( INDEX RANGE SCAN),then the clustered index for each row found in the secondary index INDEX UNIQUE SCAN.
The following creates a second sales table with a clustered index and a secondary index on SALE_DATE.
This SQL Database bundle is complete solution to repairs yourcorrupt SQL database whether it is caused by Clustered Index, Leaf Level Corruption or Consistency Corruption.
Accessing table data via a secondary index(index on a clustered index) is slower than a similar query on a heap-table.
Therefore the most important Directory Entries are of the root directory, because it contains cluster indexes that points to all Sub-Directories.
A localization index and a cluster index are calculated in order to measure the prevalence of agglomeration.
B-Tree type index using clusters.