What is a PL SQL package?
A PL/SQL package is a named collection of functions, procedures, variables, cursors, user-defined types, and records that are referenced using a common qualifier, the package name. Packages provide a convenient way of organizing the functions and procedures that have a related purpose.
What is Oracle dependency?
Oracle manages all local dependencies using the database’s internal dependency table, which keeps track of each schema object’s dependent objects. When a referenced object is modified, Oracle uses the depends-on table to identify dependent objects, which are then invalidated.
What are the benefits of PL SQL packages?
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 a dependent object?
A dependent object is an object that is used by another object. For example, a source definition referenced by a shortcut is a dependent object of that shortcut. A dependent object is a child object to the parent object that uses the dependent object.
What is a package in PL SQL Mcq?
1) PL/SQL packages are schema objects that group logically related PL/SQL types, variables and subprograms.
What are Oracle packages?
In PL/SQL, a package is a schema object that contains definitions for a group of related functionalities. A package includes variables, constants, cursors, exceptions, procedures, functions, and subprograms. It is compiled and stored in the Oracle Database.
What is connect by in Oracle?
CONNECT BY specifies the relationship between parent rows and child rows of the hierarchy. The NOCYCLE parameter instructs Oracle Database to return rows from a query even if a CONNECT BY LOOP exists in the data.
Why packages are used what are its advantages?
Advantages of PL/SQL Packages Packages let you encapsulate logically related types, items, and subprograms in a named PL/SQL module. With packages, you can specify which types, items, and subprograms are public (visible and accessible) or private (hidden and inaccessible).
What are the packages used for?
Package in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for: Preventing naming conflicts. For example there can be two classes with name Employee in two packages, college.
Which are the exceptions of the Utl_file package?
Table 57-6 GET_LINE Procedure Parameters
| Parameters | Description |
|---|---|
| file | Active file handle returned by an FOPEN call. The file must be open for reading (mode ‘ r ‘), otherwise an INVALID_OPERATION exception is raised. |
| buffer | Data buffer to receive the line read from the file. |
Which procedure adds a new job to the job queue?
The DBMS_JOB Package
| Procedure | Description |
|---|---|
| CHANGE | Alters a specified job that has already been submitted to the job queue. You can alter the job description, the time at which the job will be run, or the interval between executions of the job. See “Altering a Job”. |
What are packages in PL/SQL?
Packages are schema objects that groups logically related PL/SQL types, variables, and subprograms. A package will have two mandatory parts −. Package specification. Package body or definition.
Why does PL/SQL throw an exception when a package is not declared?
In case they do not match, PL/SQL throws an exception. The package body may contain other subprograms that are not declared in the package specification. In that case, those are private to that package body only.
Can I call from PL/SQL or other programming environments in Oracle?
Oracle and various Oracle tools are supplied with product-specific packages that define application programming interfaces (APIs) you can call from PL/SQL, SQL, Java, or other programming environments. Here we mention a few of the more widely used ones. For more information, see Oracle Database PL/SQL Packages and Types Reference.
How to assign and fetch values from a package in PL SQL?
The public variable of the package can also be used in the same way to assign and fetch values from them i.e. ‘ . ’. In PL/SQL whenever a package is referred/called in a session a new instance will be created for that package.