Which of the following is a PL SQL unit?
The basic unit of a PL/SQL source program is the block, which groups together related declarations and statements. A PL/SQL block is defined by the keywords DECLARE, BEGIN, EXCEPTION, and END. These keywords divide the block into a declarative part, an executable part, and an exception-handling part.
Which of the following is not true about the Plsql function?
Q 19 – Which of the following is not true about the PL/SQL functions? A – A PL/SQL function is same as a procedure except that it returns a value. B – The function body must contain a RETURN statement. C – The RETURN clause does not specify the data type of the return value.
Which of the following is not true about PL SQL nested tables?
Which of the following is not true about PL/SQL nested tables? Nested table is similar to declaration of an index-by table along with INDEX BY clause. A nested table can be stored in a database column. Elements of a nested table could be a %ROWTYPE of any database table.
Is PL SQL only for Oracle?
The PL/SQL engine can only be installed in an Oracle Database server or an application development tool such as Oracle Forms.
Where is PL SQL used?
PL/SQL can execute a number of queries in one block using single command. One can create a PL/SQL unit such as procedures, functions, packages, triggers, and types, which are stored in the database for reuse by applications.
|Mainly used to manipulate data.||Mainly used to create an application.|
What is procedure in PL SQL with example?
Procedure Vs. Function: Key Differences
|Used mainly to a execute certain process||Used mainly to perform some calculation|
|Cannot call in SELECT statement||A Function that contains no DML statements can be called in SELECT statement|
|Use OUT parameter to return the value||Use RETURN to return the value|
Which part of PL SQL subprogram is compulsory?
Declaration part of a subprogram is not mandatory but anonymous block is mandatory.
What is the difference between a procedure and a function?
Function is used to calculate something from a given input. Hence it got its name from Mathematics. While procedure is the set of commands, which are executed in a order.
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.
Which is an example of a PL SQL subprogram?
A procedure invocation is a PL/SQL statement. For example: raise_salary(employee_id, amount); A function invocation is an expression.
What is PL SQL and what are advantages of it?
PL/SQL allows sending an entire block of statements to the database at one time. This reduces network traffic and provides high performance for the applications. PL/SQL gives high productivity to programmers as it can query, transform, and update data in a database.