Is keyword in PL SQL?

The Oracle PL/SQL IS keyword appears in the subprogram definitions of both procedures and functions. It logically unites the header and declarative part of a subprogram. AS is an alias keyword which can be used in place of IS.

Difference between ‘IS’ and ‘AS’ in PL/SQL 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. SQL> create or replace view emp_view as select * from scott. emp ; View created.

Additionally, is Vs as in Oracle? “IS” and “AS” act as a synonym while creating procedures and packages but not for a cursor, table or view. The AS keyword is used instead of the IS keyword for creating a standalone procedure. IS is for embedded (within a block, subprogram or package) entities.

Keeping this in consideration, what is a reserved word in SQL?

Reserved words are SQL keywords and other symbols that have special meanings when they are processed by the Relational Engine. Reserved words are not recommended for use as database, table, column, variable or other object names.

What is the difference between IS and AS while creating procedure?

There is no difference between is/as is is used for creating a new procedure with a new name where as ‘as’ is used to create a new procedure with existing procedure name it will not display “procedure already exists”.

What are the advantages of PL 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.

What is the basic structure of PL SQL?

PL/SQL is a block-structured language whose code is organized into blocks. A PL/SQL block consists of three sections: declaration, executable, and exception-handling sections. In a block, the executable section is mandatory while the declaration and exception-handling sections are optional. A PL/SQL block has a name.

Why do we use PL SQL?

PL/SQL is most useful to write triggers and stored procedures. Stored procedures are units of procedural code stored in a compiled form within the database. Block Structures: PL SQL consists of blocks of code, which can be nested within each other. PL/SQL Blocks can be stored in the database and reused.

What is PL SQL stand for?

Introduction to PL/SQL PL/SQL stands for “Procedural Language extensions to the Structured Query Language”. SQL is a popular language for both querying and updating data in the relational database management systems (RDBMS). PL/SQL only can execute in an Oracle Database.

What is the difference between PL and SQL?

PL/SQL is a Procedural language which is an extension of SQL, and it holds the SQL statements within its syntax. The basic difference between SQL and PL/SQL is that in SQL a single query gets executed at a time whereas, in PL/SQL a whole block of code get executed at a time.

What is a function in Oracle PL SQL?

A stored function (also called a user function or user-defined function) is a set of PL/SQL statements you can call by name. Stored functions are very similar to procedures, except that a function returns a value to the environment in which it is called. User functions can be used as part of a SQL expression.

What is PL SQL and what is it used for?

SQL is a structured query language used for data manipulation, whereas PL/SQL is a procedural language to design applications. PL/SQL is an application language usually used to build, format and display the user screens, web pages and reports, while SQL provides data for these applications.

What is procedure in PL SQL?

The PL/SQL stored procedure or simply a procedure is a PL/SQL block which performs one or more specific tasks. It is just like procedures in other programming languages. Body: The body contains a declaration section, execution section and exception section similar to a general PL/SQL block.

What are keywords in SQL?

In SQL, the keywords are the reserved words that are used to perform various operations in the database. Introduction to SQL Keywords CREATE. The CREATE Keyword is used to create a database, table, views, and index. PRIMARY KEY. INSERT. SELECT. FROM. ALTER. ADD. DISTINCT.

What is data integrity in SQL?

The term data integrity refers to the accuracy and consistency of data. When creating databases, attention needs to be given to data integrity and how to maintain it. A good database will enforce data integrity whenever possible. For example, a user could accidentally try to enter a phone number into a date field.

What is SQL Select statement?

The SQL SELECT statement returns a result set of records from one or more tables. A SELECT statement retrieves zero or more rows from one or more database tables or database views. ORDER BY specifies an order in which to return the rows. AS provides an alias which can be used to temporarily rename tables or columns.

What are the SQL commands?

SQL commands are grouped into four major categories depending on their functionality: Data Definition Language (DDL) – These SQL commands are used for creating, modifying, and dropping the structure of database objects. The commands are CREATE, ALTER, DROP, RENAME, and TRUNCATE.

What is in operator in SQL?

The SQL IN Operator The IN operator allows you to specify multiple values in a WHERE clause. The IN operator is a shorthand for multiple OR conditions.

Can we use reserved keywords as alias name?

Non-reserved keywords have a special meaning in some contexts, but can be used as identifiers in others. You can use non-reserved keywords as aliases—for example, SOURCE : You can use these keywords as table aliases only if they are double-quoted; otherwise, double-quotes can be omitted: ANTI.