AdministratorWhat is EXTRACTVALUE in Oracle?
EXTRACTVALUE SQL Function. SQL function extractValue takes as parameters an XMLType instance and an XPath expression that targets a node set. It returns a scalar value corresponding to the result of the XPath evaluation on the XMLType instance. XML schema-based documents.
What is extract value?
The EXTRACTVALUE function takes as arguments an XMLType instance and an XPath expression and returns a scalar value of the resultant node. The result must be a single node and be either a text node, attribute, or element.
How do I display XMLType data in SQL Developer?
To access the SYS. XMLTYPE ‘type’, you will need to access the ‘Complex’ datatype list and navigate to the ‘SYS’ schema. You can then set any of the XML specific options. You can read the nitty-gritty details on XMLTYPE here.
Where Bfile data will be stored?
BFILE is an Oracle proprietary data type that provides read-only access to data located outside the database tablespaces on tertiary storage devices, such as hard disks, network mounted files systems, CD-ROMs, PhotoCDs, and DVDs. BFILE data is not under transaction control and is not stored by database backups.
What is an application domain index?
An application domain index is a customized index specific to an application. Oracle Database provides extensive indexing to do the following: Accommodate indexes on customized, complex data types such as documents, spatial data, images, and video clips (see “Unstructured Data”)
What is extract value in SQL?
SQL extract provides access to the components of temporal data types—i.e. date , time , timestamp , and interval . SQL extract uses the keyword from to separate the field name from the value. EXTRACT( FROM ) The field names are SQL keywords too—you must not put them in double or single quotes.
What is Urowid?
UROWID. The Universal ROWID ( UROWID ) is a datatype that can store both logical and physical rowids of Oracle tables. Logical rowids are primary key-based logical identifiers for the rows of Index-Organized Tables (IOTs).
What is the Bfile used for?
What is the utility of Bfile?
The BFILE datatype is used to store unstructured binary data outside the database. The column of BFILE type stores file locator that points the OS file which actually stores data.
What is an Oracle Domain index?
A domain index is an index that applies to a specific application domain. The domain index is external to the standard Oracle database. The domain index feature allows a developer to create extensions to the standard functionality of Oracle through the use of domain indexing.