How many types of reports are there in Oracle?

How many types of reports are there in Oracle?

three types

What is Oracle Report Builder?

Oracle Reports Builder is the report-building component of Oracle Reports, a powerful enterprise reporting tool that enables you to rapidly develop and deploy sophisticated Web and paper reports against any data source (including an Oracle database, JDBC, XML, and text files).

What is RDF Oracle report?

Spatial Resource Description Framework (RDF)

What is views in Oracle with example?

In Oracle, view is a virtual table that does not physically exist. It is stored in Oracle data dictionary and do not store any data. It can be executed when called. A view is created by a query joining one or more tables.

What are triggers in Oracle?

A trigger is a named PL/SQL block stored in the Oracle Database and executed automatically when a triggering event takes place. For example, if you define a trigger that fires before an INSERT statement on the customers table, the trigger will fire once before a new row is inserted into the customers table.

What are Oracle procedures?

Oracle Procedures. A procedure is a group of PL/SQL statements that can be called by name. The call specification (sometimes called call spec) specifies a java method or a third-generation language routine so that it can be called from SQL and PL/SQL.

Is Oracle a procedure?

[ IS | AS ] BEGIN EXCEPTION END; CREATE PROCEDURE instructs the compiler to create new procedure in Oracle. Keyword ‘OR REPLACE’ instructs the compile to replace the existing procedure (if any) with the current one. Procedure name should be unique.

What are Oracle functions?

Oracle Function. A function is a subprogram that is used to return a single value. You must declare and define a function before invoking it. It can be declared and defined at a same time or can be declared first and defined later in the same block.

What is difference between function and procedure in Oracle?

What are the differences between Stored procedures and functions?

Functions	Procedures
A function does not allow output parameters	A procedure allows both input and output parameters.
You cannot manage transactions inside a function.	You can manage transactions inside a function.

What is the use of procedure in Oracle?

A procedure is a group of PL/SQL statements that you can call by name. A call specification (sometimes called call spec) declares a Java method or a third-generation language (3GL) routine so that it can be called from SQL and PL/SQL. The call spec tells Oracle Database which Java method to invoke when a call is made.

What is difference between function and procedure?

A procedure is used to perform certain task in order. A function can be called by a procedure. A function returns a value and control to calling function or code. A procedure returns the control but not any value to calling function or code.

What is the use of cursor in Oracle?

The major function of a cursor is to retrieve data, one row at a time, from a result set, unlike the SQL commands which operate on all the rows in the result set at one time. Cursors are used when the user needs to update records in a singleton fashion or in a row by row manner, in a database table.

What is cursor example?

Oracle creates a memory area, known as the context area, for processing an SQL statement, which contains all the information needed for processing the statement; for example, the number of rows processed, etc. A cursor is a pointer to this context area. A cursor holds the rows (one or more) returned by a SQL statement.

What is cursor and its types?

Cursor is a Temporary Memory or Temporary Work Station. It is Allocated by Database Server at the Time of Performing DML operations on Table by User. Cursors are used to store Database Tables. There are 2 types of Cursors: Implicit Cursors, and Explicit Cursors.

What is parameterized cursor in Oracle?

What is Parameterized cursor? Unlike simple explicit cursor, parameterized cursors accept values as parameter. You specify the list of parameters separated by comma (,) while declaring the cursor and supply the corresponding argument for each parameter in the list while opening the cursor.

How do I pass one cursor to another cursor?

1 Answer. It is possible to reference another cursor within the first one: declare cursor c1 is select distinct Assigned from table_name; cursor c2(p_Assigned in varchar2) is select id, Assigned from table_name where Assigned = p_Assigned; begin for r1 in c1 loop dbms_output.

Can we pass parameters to cursor in Oracle?

We can pass parameters into a cursor and use them in the query. We can only pass values to the cursor; and cannot pass values out of the cursor through parameters. Only the datatype of the parameter is defined, not its length.

What is implicit cursor in Oracle?

A SQL (implicit) cursor is opened by the database to process each SQL statement that is not associated with an explicit cursor. Every SQL (implicit) cursor has six attributes, each of which returns useful information about the execution of a data manipulation statement.

What are cursors in database?

In computer science, a database cursor is a mechanism that enables traversal over the records in a database. Cursors are used by database programmers to process individual rows returned by database system queries. Cursors enable manipulation of whole result sets at once.

How do I run a cursor in Oracle?

To open a cursor, you use the following syntax: OPEN cursor_name; In this syntax, the cursor_name is the name of the cursor declared in the declaration section. When you open a cursor, Oracle parses the query, binds variables, and executes the associated SQL statement.

What are triggers in SQL?

A trigger is a special type of stored procedure that automatically runs when an event occurs in the database server. DML triggers run when a user tries to modify data through a data manipulation language (DML) event. DML events are INSERT, UPDATE, or DELETE statements on a table or view.

What are different types of triggers?

There are three types of triggers in SQL Server.

• DDL Trigger.
• DML Trigger.
• Logon Trigger.

What is trigger with example?

Trigger: A trigger is a stored procedure in database which automatically invokes whenever a special event in the database occurs. For example, a trigger can be invoked when a row is inserted into a specified table or when certain table columns are being updated.

Why do we need triggers?

Triggers help the database designer ensure certain actions, such as maintaining an audit file, are completed regardless of which program or user makes changes to the data. The programs are called triggers since an event, such as adding a record to a table, fires their execution.

Are triggers good or bad?

Triggers are extremely powerful and useful, there are any number of scenarios where a trigger is the best solution to a problem. They are also a very good “hack” tool. There are often situations where you are not in immediate control of both the code and the database.

Why triggers are not recommended?

Triggers can cause performance issues if not written carefully and not enough developers are knowledgeable enough to write them well. Triggers are often slower than other means of maintaining data integrity, so if you can use a check constraint, use that instead of a trigger.

How do you explain triggers?

Triggers are anything that might cause a person to recall a traumatic experience they’ve had. For example, graphic images of violence might be a trigger for some people. Less obvious things, including songs, odors, or even colors, can also be triggers, depending on someone’s experience.

What are 3 types of behavior triggers?

Here, I’ll discuss three types of trigger: external, internal, and synthetic. These each have different strengths and weaknesses, and each can be used to design great behaviors that form lasting habits. Let’s look more closely at each type of trigger.

What are examples of emotional triggers?

Common situations that trigger intense emotions include:

• rejection.
• betrayal.
• unjust treatment.
• challenged beliefs.
• helplessness or loss of control.
• being excluded or ignored.
• disapproval or criticism.
• feeling unwanted or unneeded.

What are internal triggers?

INTERNAL TRIGGERS are feelings that people have before or during drinking or using drugs. For instance, some people may feel insecure about sex and think they have to drink alcohol in order to relax before having sex.