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.
How many parts are there in PL SQL?
As Figure 1-1 shows, a PL/SQL block has three parts: a declarative part, an executable part, and an exception-handling part. (In PL/SQL, a warning or error condition is called an exception.) Only the executable part is required. The order of the parts is logical.
What are the types of PL SQL blocks?
In PL/SQL, All statements are classified into units that is called Blocks. PL/SQL blocks can include variables, SQL statements, loops, constants, conditional statements and exception handling.
What are PL SQL blocks?
A PL/SQL block is defined by the keywords DECLARE , BEGIN , EXCEPTION , and END . These keywords partition the block into a declarative part, an executable part, and an exception-handling part. Only the executable part is required.
What is the limit on the size of a PL SQL block?
C PL/SQL Program Limits
|size of a CHAR value (bytes)||32767|
|size of a LONG value (bytes)||32760|
|size of a LONG RAW value (bytes)||32760|
|size of a RAW value (bytes)||32767|
What is a nested block?
Nest Blocks. Block references that contain other blocks are known as nested blocks. Using blocks within blocks can simplify the organization of a complex block definition. The only restriction on nested blocks is that you cannot insert blocks that reference themselves.
What are the features of PL SQL block?
Features of PL/SQL
- PL/SQL is tightly integrated with SQL.
- It offers extensive error checking.
- It offers numerous data types.
- It offers a variety of programming structures.
- It supports structured programming through functions and procedures.
- It supports object-oriented programming.
How many types of blocks are there in Oracle?
There are three types of blocks that make up a PL/SQL program: Anonymous blocks: These are the unnamed PL/SQL blocks that are embedded within an application or are issued interactively. Procedures: These are the named PL/SQL blocks.
What are different variable types in PL SQL?
A wide range of data types are supported and can be used to declare variables in a PL/SQL block.
Data types (PL/SQL)
|PL/SQL data type||DB2® SQL data type||Description|
|INTEGER||INTEGER||Signed four-byte integer numeric data|
|LONG||CLOB (32760)||Character large object data|
What is the difference between SQL and Plsql?
SQL is data oriented language. PL/SQL is application oriented language. SQL is used to write queries, create and execute DDL and DML statments. PL/SQL is used to write program blocks, functions, procedures, triggers and packages.
What is & in PL SQL?
& has no meaning in PL/SQL, it is actually a SQL Plus feature (that has been copied in Toad, SQL Developer etc. for compatibility). In SQL Plus, & is used to define a substitution variable, which is replaced with specified replacement text by SQL Plus before the code is sent to the server to be processed.
What are group functions?
What Are Group Functions? Group functions operate on sets of rows to give one result per group. Group Functions Unlike single-row functions, group functions operate on sets of rows to give one result per group. These sets may be the whole table or the table split into groups.
Which section in PL SQL block is mandatory Mcq?
Declaration part of a subprogram is not mandatory but anonymous block is mandatory.