stored procedure pl/sql patient report

A pl sql stored procedure can be divided into two parts: Header and Body part. Header: The header part contains the name of the procedure and the parameters passed to the procedure. Body: The body part contains declaration section, execution section and exception section.

Full Answer

What is stored procedure in PL/SQL?

The procedures in PL/ SQL are stored in the database and are invoked through triggers, some other procedures, applications of Java, PHP, etc. Stored Procedure has a header and body. Header containing the name of the procedure along with the parameters to be passed.

What are the characteristics of procedure subprogram unit in PL/SQL?

Below are the characteristics of Procedure subprogram unit in PL/SQL: Procedures are standalone blocks of a program that can be stored in the database. Call to these PLSQL procedures can be made by referring to their name, to execute the PL/SQL statements. It is mainly used to execute a process in PL/SQL.

Can We have a return statement in PL/SQL procedure?

In PL/SQL procedure you can have a RETURN statement. However, unlike the RETURN statement in the function that returns a value to calling program, the RETURN statement in the procedure is used only to halt the execution of the procedure and return control to the caller. The RETURN statement in procedure does not take any expression or constant.

How do I create a stored procedure in Oracle database engine?

In Object Explorer, connect to an instance of Database Engine. From the File menu, click New Query. Copy and paste the following example into the query window and click Execute. This example creates the same stored procedure as above using a different procedure name.

How do you create a report in PL SQL?

As you build this example report, you will:Create a new PL/SQL library that you will use in this report.Create the report definition: Create a query. ... Create the report layout using the Report Block Wizard.Add vertical space between records: Create a user parameter. ... Run your report to paper.

Is PL SQL a stored procedure?

PL/SQL is a block-structured language that enables developers to combine the power of SQL with procedural statements. A stored procedure in PL/SQL is nothing but a series of declarative SQL statements which can be stored in the database catalogue.

How do I view a stored procedure in SQL Developer?

In Oracle SQL Developer, click on the Schema to expand the node on the left side. Then click on the Procedure node to expand. List of Stored Procedure will display.

How use Rowcount in SQL PL SQL?

The value of the SQL%ROWCOUNT attribute refers to the most recently executed SQL statement from PL/SQL. To save an attribute value for later use, assign it to a local variable immediately. The SQL%ROWCOUNT attribute is not related to the state of a transaction.

What is the difference between PL SQL and stored procedure?

PL/SQL is Oracle's version of SQL. Both are ANSI SQL compliant, but contain additional capabilities that are not in the standard. A Stored Procedure is a prepared SQL statement that is stored on the database server, and can be reused by calling it.

How do you call a stored procedure in PL SQL?

Question: What is the proper way to call a PL/SQL stored procedure? Answer: Calling Procedures from PL/SQL is easy. If you are calling a procedure from SQL*Plus is easy, calling it from PL/SQL is effortless. Simply call the stoted procedure from within the code section of any PL/SQL block .

How do I view a stored procedure?

You can find the stored procedure in the Object Explorer, under Programmability > Stored Procedures as shown in the following picture: Sometimes, you need to click the Refresh button to manually update the database objects in the Object Explorer.

How do I find the stored procedure code in PL SQL Developer?

You can use the connections tab which is in the left side of sql developer. Show activity on this post. Browse to the connection name in the connections tab, expand the required object and just click, it will open the code in new tab.

How can I view stored procedure code in SQL Server?

First, run SQL Server Management Studio and connect to the Database Engine. Next, under Object Explorer, expand the database in which you have created a procedure, and then expand “Programmability” option. Next, expand “Stored Procedures”, right-click the procedure you want and then select “View Dependencies” option.

How can I get the number of records affected by a stored procedure?

Use SQL%ROWCOUNT if you are using Oracle. Mind that if you have multiple INSERT/UPDATE/DELETE , you'll need a variable to store the result from @@ROWCOUNT for each operation. Show activity on this post. @@RowCount will give you the number of records affected by a SQL Statement.

How do I get Rowcount in SQL?

The SQL COUNT() function returns the number of rows in a table satisfying the criteria specified in the WHERE clause. It sets the number of rows or non NULL column values. COUNT() returns 0 if there were no matching rows. The above syntax is the general SQL 2003 ANSI standard syntax.

How can you tell how many cursors a record has?

You can use %ROWCOUNT attribute of a cursor. This will always return zero because no rows have been fetched.

What is a subprogram in SQL?

Below are the characteristics of Procedure subprogram unit in PL/SQL: Procedures are standalone blocks of a program that can be stored in the database.

What is a parameter in SQL?

The parameter is variable or placeholder of any valid PL/SQL datatype through which the PL/SQL subprogram exchange the values with the main code. This parameter allows to give input to the subprograms and to extract from these subprograms.

Can a subprogram be read only?

It is a read-only variable inside the subprograms. Their values cannot be changed inside the subprogram. In the calling statement, these parameters can be a variable or a literal value or an expression, for example, it could be the arithmetic expression like '5*8' or 'a/b' where 'a' and 'b' are variables.

Can a return statement return a value in Oracle?

A Procedure in SQL can have a RETURN statement to return the control to the calling block, but it cannot return any values through the RETURN statement .

How does a stored procedure help a database?

Use of stored procedure or function helps in maintaining the security of the database as access to them and their usage can be controlled by granting access/permission to users while the permission to change or to edit or to manipulate the database may not be granted to users. 5. Saves Memory.

What is stored procedure?

Stored procedure and Function, both can be defined as a set of logically written statements, stored in the database and are executed when called, to perform a specific task. Both function as well as stored procedure have a unique named block of code which is compiled and stored in the database. Any stored procedure or function created, remains ...

Why is Oracle compiled?

1. Improves Database Performance. Compilation is automatically done by oracle engine. Whenever the calling of procedure or function is done ,the oracle engine loads the compiled code into a memory area called System Global Area (SGA) due to which execution becomes faster. 2. Provides Reusability and avoids redundancy.

Is a stored procedure useless?

Any stored procedure or function created, remains useless unless it is called. Therefore, after creating a stored procedure or function it is necessary to make a call for that stored procedure or function from another PL/SQL block in order to serve the purpose for which it has been created.

What is a Stored Procedure?

A stored procedure is a prepared SQL code that you can save, so the code can be reused over and over again.

Stored Procedure Example

The following SQL statement creates a stored procedure named "SelectAllCustomers" that selects all records from the "Customers" table:

Stored Procedure With One Parameter

The following SQL statement creates a stored procedure that selects Customers from a particular City from the "Customers" table:

Stored Procedure With Multiple Parameters

Setting up multiple parameters is very easy. Just list each parameter and the data type separated by a comma as shown below.

What is a subprogram in PL/SQL?

In this chapter, we will discuss Procedures in PL/SQL. A subprogram is a program unit/module that performs a particular task. These subprograms are combined to form larger programs. This is basically called the 'Modular design'. A subprogram can be invoked by another subprogram or program which is called the calling program.

Is an IN parameter read only?

It is a read-only parameter. Inside the subprogram, an IN parameter acts like a constant. It cannot be assigned a value. You can pass a constant, literal, initialized variable, or expression as an IN parameter. You can also initialize it to a default value; however, in that case, it is omitted from the subprogram call.

What is a PL/SQL procedure?

Like a PL/SQL function, a PL/SQL procedure is a named block that does a specific task. PL/SQL procedure allows you to encapsulate complex business logic and reuse it in both database layer and application layer.

What is the procedure body?

Everything after the IS keyword is known as procedure body . The procedure body has similar syntax with an anonymous block which consists of the declaration, execution and exception sections. The declaration and exception sections are optional. You must have at least one executable statement in the execution section.

How to call a procedure without parameters?

A procedure can call other procedures. A procedure without parameters can be called directly by using EXEC statement or EXECUTE statement followed by the name of the procedure as follows: EXEC procedure_name (); EXEC procedure_name; Code language: SQL (Structured Query Language) (sql) A procedure with parameters can be called by using EXEC ...

Can a return statement be used in a PL/SQL procedure?

In PL/SQL procedure you can have a RETURN statement. However, unlike the RETURN statement in the function that returns a value to calling program, the RETURN statement in the procedure is used only to halt the execution of the procedure and return control to the caller.

Permissions

Requires CREATE PROCEDURE permission in the database and ALTER permission on the schema in which the procedure is being created.

How to create a stored procedure

In Object Explorer, connect to an instance of Database Engine and then expand that instance.

Terminologies in PL/SQL Subprograms

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What Is function?

Similarities Between Procedure and Function

Built-In Functions in PL/SQL

Summary

• Functions is a standalone PL/SQL subprogram. Like PL/SQL procedure, functions have a unique name by which it can be referred. These are stored as PL/SQL database objects. Below are some of the characteristics of functions. 1. Functions are a standalone block that is mainly used for calculation purpose. 2. Function use RETURN keyword to return the v...

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