Quick Answer: What is the benefit of multiple SQL statements getting combined in a Plsql block?

It allows the users/developers to run multiple SQL statements at once by wrapping them in a block. It is compatible with SQL. It allows us to use all the SQL statements, data manipulation, cursor handling, transaction statements in PL/SQL blocks. There is no need for conversion between the two of them.

What are the advantages of PL SQL block?

PL/SQL allows sending an entire block of statements to the database at one time. This reduces network traffic and provides high performance for the applications. PL/SQL gives high productivity to programmers as it can query, transform, and update data in a database.

What are the advantages of using %type and %Rowtype in PL SQL?

Using the %ROWTYPE Attribute to Declare Variables

For easier maintenance of code that interacts with the database, you can use the %ROWTYPE attribute to declare a variable that represents a row in a table. A PL/SQL record is the datatype that stores the same information as a row in a table.

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What are the advantages of Plsql over SQL?

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.

Which of the following is one of the benefits of using PL SQL?

PL/SQL is a completely portable, high-performance transaction processing language that offers the following advantages: Tight Integration with SQL. Better Performance. Higher Productivity.

Which is better SQL or PL SQL?

Procedural language capability: It consists of procedural language constructs like conditional statements (if else statements) and loops like (FOR loops). Better performance: PL/SQL engine processes multiple SQL statements at the same time as one block, thereby reducing network traffic.

What are the disadvantages of PL SQL?

Disadvantages of using PL/SQL

  • The debugger never worked.
  • Ant syntax error is just reported by a general error message. Without any. indication for its location. The only way to find it is to comment out parts. …
  • The syntax is awkward, complex and inconsistent.

Why do we use Rowtype in PL SQL?

The %ROWTYPE attribute provides a record type that represents a row in a database table. The record can store an entire row of data selected from the table or fetched from a cursor or cursor variable. … A PL/SQL strongly typed cursor variable, previously declared within the current scope.

What is the advantage of using the Rowtype data type?

What is the advantage of using the %ROWTYPE datatype? a. It is useful to retrieve an entire row from a table. If you do not use the %ROWTYPE datatype, then you have to declare variables for each column separately.

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What is the advantage of using the person row type data type?

% ROWTYPE provides the record type that represents a entire row of a table or view or columns selected in the cursor. The advantages are : I. Need not know about variable’s data typeii. If the database definition of a column in a table changes, the data type of a variable changes accordingly.

What is the purpose of trigger?

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.

What is difference between stored procedure and function?

The function must return a value but in Stored Procedure it is optional. Even a procedure can return zero or n values. Functions can have only input parameters for it whereas Procedures can have input or output parameters. Functions can be called from Procedure whereas Procedures cannot be called from a Function.

What is difference between Equi join and Non Equi join?

A join that is using only the “equals” comparison in the join condition is called Equi-Join. A Join that has at least one comparison in the join condition that is not an “equals” comparison is called a Nonequi-Join.

What is trigger in PL SQL with examples?

Triggers are stored programs, which are automatically executed or fired when some events occur. Triggers are, in fact, written to be executed in response to any of the following events − A database manipulation (DML) statement (DELETE, INSERT, or UPDATE) A database definition (DDL) statement (CREATE, ALTER, or DROP).

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Where are exceptions used in PL SQL?

An error occurs during the program execution is called Exception in PL/SQL. PL/SQL facilitates programmers to catch such conditions using exception block in the program and an appropriate action is taken against the error condition. There are two type of exceptions: System-defined Exceptions.

Who uses PL SQL?

PL/SQL is most often used by companies with 50-200 employees and 1M-10M dollars in revenue. Our data for PL/SQL usage goes back as far as 5 years and 9 months. If you’re interested in the companies that use PL/SQL, you may want to check out PHP and Java as well.

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