Best answer: Which of the following is true about PL SQL package body?

Which of the following is true about PL SQL nested tables?

Q 7 – Which of the following is true about PL/SQL nested tables? A – Nested tables are like one-dimensional arrays with arbitrary number of elements. B – Unlike arrays a nested table doesn’t have declared number of elements. The size of a nested table can increase dynamically.

Which of the following is true about PL SQL index by tables Mcq?

Which of the following is true about PL/SQL index-by tables? It is a set of key-value pairs. Each key is unique and is used to locate the corresponding value. The key can be either an integer or a string.

What is PL SQL package?

In PL/SQL, a package is a schema object that contains definitions for a group of related functionalities. A package includes variables, constants, cursors, exceptions, procedures, functions, and subprograms. It is compiled and stored in the Oracle Database. Typically, a package has a specification and a body.

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Which of the following statements are true for stored procedure in PL SQL?

Answer: Stored Procedures can not be executed from within Functions. Stored Procedures can not be executed via Queries. Stored Procedures can perform Transaction related operations.

What is type in PL SQL?

The %TYPE attribute, used in PL/SQL variable and parameter declarations, is supported by the data server. Use of this attribute ensures that type compatibility between table columns and PL/SQL variables is maintained. … If the data type of the column or variable changes, there is no need to modify the declaration code.

What is the purpose of triggers?

Triggers are used to maintain the referential integrity of data by changing the data in a systematic fashion. Each trigger is attached to a single, specified table in the database. Triggers can be viewed as similar to stored procedures in that both consist of procedural logic that is stored at the database level.

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.

What is PL SQL table why it is used?

Why Use PL/SQL Tables? PL/SQL tables help you move bulk data. They can store columns or rows of Oracle data, and they can be passed as parameters. So, PL/SQL tables make it easy to move collections of data into and out of database tables or between client-side applications and stored subprograms.

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Where is PL SQL used?

PL/SQL can execute a number of queries in one block using single command. One can create a PL/SQL unit such as procedures, functions, packages, triggers, and types, which are stored in the database for reuse by applications.

PL/SQL Introduction.

Mainly used to manipulate data. Mainly used to create an application.

What are the benefits of PL SQL packages?

PL/SQL has these advantages:

  • Tight Integration with SQL.
  • High Performance.
  • High Productivity.
  • Portability.
  • Scalability.
  • Manageability.
  • Support for Object-Oriented Programming.
  • Support for Developing Web Applications.

What is correct statement is related to stored procedure?

Explanation: The correct answer is option 4 Stored procedures save CPU resources by re-using previously cache execution plans. The biggest performance which is built-in SQL Server is the stored procedure. SQL Server has the ability to cache the execution plan to be re-used at a later time.

What is meant by stored procedure in SQL?

A stored procedure is a set of Structured Query Language (SQL) statements with an assigned name, which are stored in a relational database management system (RDBMS) as a group, so it can be reused and shared by multiple programs.

Why stored procedure is better than query?

every query is submited it will be compiled & then executed. where as stored procedure is compiled when it is submitted for the first time & this compiled content is stored in something called procedure cache,for subsequent calls no compilation,just execution & hence better performance than query.

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