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What is XML and its types?

05/06/202205/06/2022| Shirley GriffinShirley Griffin| 0 Comment | 12:00 AM
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What is XML and its types?

XML stands for Extensible Markup Language. It is a text-based markup language derived from Standard Generalized Markup Language (SGML). XML tags identify the data and are used to store and organize the data, rather than specifying how to display it like HTML tags, which are used to display the data.

What is a component of XML?

The most basic components of an XML document are elements, attributes, and comments.

What is identifier in Plsql?

PL/SQL identifiers are constants, variables, exceptions, procedures, cursors, and reserved words. The identifiers consist of a letter optionally followed by more letters, numerals, dollar signs, underscores, and number signs and should not exceed 30 characters. By default, identifiers are not case-sensitive.

What are the different types of locks in SQL Server?

At the table level, there are five different types of locks:

  • Exclusive (X)
  • Shared (S)
  • Intent exclusive (IX)
  • Intent shared (IS)
  • Shared with intent exclusive (SIX)

What is the cast function in Oracle/PLSQL?

The Oracle/PLSQL CAST function converts one datatype to another. The syntax for the CAST function in Oracle/PLSQL is: When using the CAST function, the following casts are allowed: The CAST function returns the new datatype that you have converted to. If the resulting value is larger than the target type, an error is returned.

What is xmltype in PL/SQL?

The following summarizes XMLType: XMLTypecan be used in PL/SQL stored procedures as parameters, return values, and variables. XMLTypecan represent an XML document as an instance (of XMLType) in SQL. XMLTypehas built-in member functions that operate on XML content.

Which lob datatypes does cast not support?

( CAST does not support LONG, LONG RAW, or the Oracle-supplied types.) CAST does not directly support any of the LOB datatypes.

Does Oracle support xmltype tables?

This release of Oracle supports creating tables of XMLType. You can create object references (REFs) to these tables and use them in the object cache. Create an XMLType Instance