What are the two variables supported by PL SQL?

There are two types of variable scope: Local Variable: Local variables are the inner block variables which are not accessible to outer blocks. Global Variable: Global variables are declared in outermost block.

What are different variable types in PL SQL?

A wide range of data types are supported and can be used to declare variables in a PL/SQL block.

Data types (PL/SQL)

PL/SQL data type DB2® SQL data type Description
INTEGER INTEGER Signed four-byte integer numeric data
LONG CLOB (32760) Character large object data

Which of the following is supported by PL SQL?

PL/SQL supports two character sets called the database character set, which is used for identifiers and source code, and the national character set, which is used for national language data. The datatypes NCHAR and NVARCHAR2 store character strings formed from the national character set.

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How are variables declared in PL SQL?

PL/SQL variables must be declared in the declaration section or in a package as a global variable. When you declare a variable, PL/SQL allocates memory for the variable’s value and the storage location is identified by the variable name.

What are default variables in PL SQL?

Variables are default initialized with NULL.

How many types of variables are there in Oracle?

Table 5-1 Summary of Oracle Built-In Datatypes

Datatype Description
BLOB Unstructured binary data.
BFILE Binary data stored in an external file.
RAW (size) Variable-length raw binary data.
LONG RAW Variable-length raw binary data.

What are composite variables in PL SQL?

PL/SQL lets you define two kinds of composite data types, collection and record. A composite data type stores values that have internal components. You can pass entire composite variables to subprograms as parameters, and you can access internal components of composite variables individually.

Which of the following datatypes supports PL SQL Mcq?

both 1 & 2 (Scalar datatype & Composite datatype supports PS/SQL).

What type of PL SQL variables are also called pointers?

A reference type holds values, called pointers, that designate other program items. A LOB type holds values, called lob locators, that specify the location of large objects, such as text blocks or graphic images, that are stored separately from other database data.

Which of the following are the features of PL SQL?

Features of PL/SQL

  • PL/SQL is tightly integrated with SQL.
  • It offers extensive error checking.
  • It offers numerous data types.
  • It offers a variety of programming structures.
  • It supports structured programming through functions and procedures.
  • It supports object-oriented programming.
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What are SQL variables?

A Transact-SQL local variable is an object that can hold a single data value of a specific type. Variables in batches and scripts are typically used: As a counter either to count the number of times a loop is performed or to control how many times the loop is performed.

How many types of variable scope are present in PL SQL?

Variable Scope in PL/SQL:

There are two types of variable scope: Local Variable: Local variables are the inner block variables which are not accessible to outer blocks. Global Variable: Global variables are declared in outermost block.

Which of the following is are true about PL SQL variables?

PL/SQL Variables are by default not case sensitive. Explanation: PL/SQL Variable needs to be declared in the Declaration Section.

What are local and global variables in SQL?

Local variable is declared inside a function whereas Global variable is declared outside the function. Local variables are created when the function has started execution and is lost when the function terminates, on the other hand, Global variable is created as execution starts and is lost when the program ends.

What is global variable Oracle?

any variable defined outside of a procedure/function is a global variable and maintains its state for the duration of the session.

Which identifier is valid in PL SQL?

You can use uppercase, lowercase, or mixed case to write identifiers. PL/SQL is not case-sensitive except within string and character literals. Every character, including dollar signs, underscores, and number signs, is significant.

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