Which delimiter is used in PL SQL?

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

What are the literals in PL SQL?

A literal is an explicit numeric, character, string, or Boolean value not represented by an identifier. The numeric literal 135 and the string literal ‘hello world’ are examples. A member of the PL/SQL character set. For more information, see “Character Sets and Lexical Units”.

Which symbol is not equal operator from the following PL SQL delimiters?


Delimiter Meaning
!= Relational operator (not equal)
~= Relational operator (not equal)
^= Relational operator (not equal)
< Relational operator (less than)

Is keyword 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. However, in SQL there is a subtle difference between “AS” and “IS”: SQL> create or replace view emp_view as select * from scott.

How does an execution block start and end in PL SQL?

A PL/SQL block has an executable section. An executable section starts with the keyword BEGIN and ends with the keyword END . The executable section must have a least one executable statement, even if it is the NULL statement which does nothing.

What are the different datatypes that can be defined in a PL SQL block?

PL/SQL provides many predefined datatypes. For instance, you can choose from integer, floating point, character, BOOLEAN , date, collection, reference, and large object (LOB) types. PL/SQL also lets you define your own subtypes. This chapter covers the basic types used frequently in PL/SQL programs.

How do you check not equal to in PL SQL?

There are many ways to express the same syntax in Oracle SQL and the “not equals” operator may be expressed as “<>” or “! =”.

How do you check for equality in PL SQL?

Relational Operators Checks if the values of two operands are equal or not, if values are not equal then condition becomes true. (A != B) is true. Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true.

When do you use a delimiter in PL / SQL?

To show structure, you can divide lines using carriage returns and indent lines using spaces or tabs. Compare these IF statements for readability: A delimiter is a simple or compound symbol that has a special meaning to PL/SQL. For example, you use delimiters to represent arithmetic operations such as addition and subtraction.

What happens when you choose a character for a delimiter in Oracle?

Finally, if you choose a character for a delimiter and it appears in your string immediately before a single quotation mark, Oracle will be unhappy and raise an error. Sure you could do things the way you’ve always done them.

How to define a literal in Oracle Database?

As of Oracle Database 10.2, you can also use the following notation to define your own delimiter characters for the literal. You choose a character (such as! in the example below), prefix it withq’ and then do not need to escape other single quotation marks inside the pair of literals:

Which is an example of a string literal?

A string literal is a sequence of zero or more characters enclosed within single quotation marks. The following are examples of string literals: ‘Hello, world!’