Contents
Which delimiter is used in PL SQL?
The PL/SQL Delimiters
| Delimiter | Description |
|---|---|
| <<, >> | Label delimiter (begin and end) |
| /*, */ | Multi-line comment delimiter (begin and end) |
| — | Single-line comment indicator |
| .. | Range operator |
Is Oracle PL SQL outdated?
The answer is that PL/SQL is not growing, but not going away either. Because it is used in the Oracle database, and the Oracle database is a fixture of enterprise systems world-wide, it will outlive you. High-performance batch processing has to happen close to the data, so PL/SQL will continue to rule in this area.
What is the difference between Oracle and PL SQL?
PL/SQL is Oracle’s procedural language extension to SQL. PL/SQL allows you to mix SQL statements with procedural constructs. Oracle also allows you to create and store functions, which are similar to procedures, and packages, which are groups of procedures and functions.
Is PL SQL is a superset of SQL?
PL/SQL, then, is an application-development language that is a superset of SQL, supplementing it with standard programming-language features that include the following: block (modular) structure.
Is PL SQL still in demand?
As a result of its adaptability, it has become one of the most high-in-demand languages, around the world. As a result, a PL SQL developer’s salary in India is significantly increasing.
Is PL SQL legacy?
PL/SQL code older than eight years is considered legacy PL/SQL code. Frequently the original developer is not available or known anymore and/or the code is badly or not documented at all.
Is Vs as in Plsql?
Answer: The PL/SQL language evolved such the the “IS” and “AS” operators are equivalent. Functionally the “IS” and “AS” syntax performs identical functions and can be used interchangeably. However, in SQL there is a subtle difference between “AS” and “IS”: SQL> create or replace view emp_view as select * from scott.
What are the restrictions on declarations in PL / SQL?
Restrictions on Declarations PL/SQL Naming Conventions Scope and Visibility of PL/SQL Identifiers Variable Assignment Assigning Boolean Values Assigning a SQL Query Result to a PL/SQL Variable PL/SQL Expressions and Comparisons Logical Operators Boolean Expressions CASE Expressions Handling Null Values in Comparisons and Conditional Statements
What do you need to know about PL / SQL?
Tight Integration with SQL Tight Security 2 Fundamentals of PL/SQL Character Set Lexical Units Delimiters Identifiers Literals Comments Declarations Using DEFAULT Using NOT NULL Using %TYPE Using %ROWTYPE Restrictions on Declarations PL/SQL Naming Conventions Scope and Visibility of PL/SQL Identifiers Variable Assignment Assigning Boolean Values
Is there a built in assertion procedure in SQL?
There isn’t a built-in assertion procedure in SQL or PL/SQL, so you will have to write your own. There are two ways of going about this.
How to assign a result to a PL / SQL variable?
Assigning a SQL Query Result to a PL/SQL Variable PL/SQL Expressions and Comparisons Logical Operators Boolean Expressions CASE Expressions Handling Null Values in Comparisons and Conditional Statements Built-In Functions 3 PL/SQL Datatypes Predefined Datatypes Number Types Character Types National Character Types LOB Types Boolean Type