What are the components of PL SQL block?
A PL/SQL block consists of up to three sections: declarative (optional), executable (required), and exception handling (optional).
- Arvind209. Answered On : Jun 29th, 2008.
- Component of PL/SQL Block are Begin(Optional), Declare(Mandatory), Exception(Optional), END(Mandatory).
How many sections are there in PL SQL block?
A PL/SQL block has up to four different sections, only one of which is mandatory: Header. Used only for named blocks. The header determines the way the named block or program must be called.
What is the simplest unit in PL SQL?
The anonymous block is the simplest unit in PL/SQL. It is called anonymous block because it is not saved in the Oracle database. Let’s examine the PL/SQL block structure in greater detail. The anonymous block has three basic sections that are the declaration, execution, and exception handling.
Why PL SQL is 3rd generation language write its basic block structure?
PL/SQL defines a block structure for writing code. Maintaining and debugging the code is made easier with such a structure. One can easily understand the flow and execution of the program unit. … PL/SQL provides all the procedural constructs that are available in any third-generation language (3GL).
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.
How do I run a block in PL SQL?
Execute PL SQL Block in SQL Developer
In SQL Developer, press ctrl+enter or press F5 to execute the PL SQL block.
Which identifier is valid in PL SQL?
You can use uppercase, lowercase, or mixed case to write identifiers. PL/SQL is not case-sensitive except within string and character literals. Every character, including dollar signs, underscores, and number signs, is significant.
Is keyword in PL SQL?
Question: What is the 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.