What is the difference between stored procedure and package in Oracle?

What is the difference between stored procedure and package in Oracle?

Stored Program Units (Procedures, Functions, and Packages) A stored procedure, function, or package is a PL/SQL program unit that: Has a name. The only difference between procedures and functions is that functions always return a single value to the caller, while procedures do not return a value to the caller.

What are the advantages of PL SQL packages?

PL/SQL Package Benefits: Summary
Organized code management.
Easy (top-down) application design.
Easy changes to implementation.
Security and maintainability.
Session-wide persistence of variables.
Better berformance.

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What is the use of packages in Oracle?

Packages let you encapsulate logically related types, variables, constants, subprograms, cursors, and exceptions in named PL/SQL modules. You can make each package easy to understand, and make the interfaces between packages simple, clear, and well defined. This practice aids application development.

What are the advantages of using packages over procedures?

Packages provide the following advantages: Cohesion: all the procedures and functions relating to a specfic sub-system are in one program unit?.As described in Oracle docs, packages are good because of:
modularity.
easier application design.
information hiding.
added functionality.
better performance.

What is the purpose of trigger?

Triggers are used to maintain the referential integrity of data by changing the data in a systematic fashion. Each trigger is attached to a single, specified table in the database. Triggers can be viewed as similar to stored procedures in that both consist of procedural logic that is stored at the database level.

What is the difference difference between procedure and packages?

A package is a group of related procedures and functions, together with the cursors and variables they use, stored together in the database for continued use as a unit. Similar to standalone procedures and functions, packaged procedures and functions can be called explicitly by applications or users.

Why do we use packages?

Packages are used in Java in order to prevent naming conflicts, to control access, to make searching/locating and usage of classes, interfaces, enumerations and annotations easier, etc.

What are the advantages of the packages in PLSQL?

Now, the advantages of PL/SQL package -. Object-Oriented Design ? PL/SQL package have the ability to follow the principle of Object-Oriented Design. By this developers can have a tight control on how to access the modules and data structures inside the package.

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What do you need to know about packages in Oracle?

With packages, you can specify which types, objects, and subprograms are public (visible and accessible) or private (hidden and inaccessible). For example, if a package contains four subprograms, three might be public and one private.

What are the advantages of using a packaged subprogram?

When you call a packaged subprogram for the first time, the whole package is loaded into memory. So, later calls to related subprograms in the package require no disk I/O. Also, packages stop cascading dependencies and thereby avoid unnecessary recompiling.

What are the benefits of packages over standalone procedures?

Logical Grouping ? Methods that work together can be put into a cohesive unit rather than just logically coupled but physically separate. Secure Private Methods ? Functions and Procedures can be made private to the package and only be used within it. This makes the public surface simpler and more secure.

What is the difference between stick and truss roof?

Stick framing is building the roof on the construction site one piece or board at a time. The roof and ceiling is literally ?sticked? together. A wood truss on the other hand is a structurally sound engineered building product.

What is a stick built gable roof?

You?ve probably seen thousands of residential roofs in your lifetime, most either gable roofs ? which have two sloped planes ? or hip roofs ? which have four sloped planes. It turns out that both gable and hip roofs can be built on-site, also called stick-built, using ridge boards, rafters, collar ties, and chords.

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Are trusses better than stick built?

For some designs, trusses are better. And in most cases where roof trusses can be used, they are a better way to frame. However, there are cases where stick framing a roof is the better option.

What are the two types of roof framing?

There are two common ways of framing the roof of a house: with premanufactured trusses, or with rafters and ceiling joists, commonly called stick framing.

Are roof trusses stronger than rafters?

Once in place, rafters use up more wood, so they weigh more, but trusses are stronger because they are more efficient and have the capacity to produce maximum strength using fewer materials in the end.

Whats cheaper trusses or rafters?

Because they are usually pre-constructed off-site and brought to the job, trusses are faster and cheaper to install than rafters because they use smaller, cheaper pieces of lumber and rely upon multiple components to strengthen a unit rather than relying on weight-bearing rafters alone.

How do I know what size Rafter to buy?

Determine Length of Common Rafter. Determine Run : Divide the span in half, in our case 24 feet divided by 2 = 12 feet run. This is the horizontal distance the rafter travels to meet the one from the other side.

What is a stick build roof?

Stick Roof Overview. A stick-framed roof is made up of individual rafters and that are connected to a top beam. The beam, or the ridge, is the central part of the structure, as all the framing must be connected to it. Additional boards are placed horizontally on the frames to create a complete cover for the structure.

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What?s the difference between a stick roof and truss roof?

Though they use completely different processes, there are pros and cons to each method. A stick-framed roof is made up of individual rafters and that are connected to a top beam. The beam, or the ridge, is the central part of the structure, as all the framing must be connected to it.

Which is the central part of a stick roof?

A stick-framed roof is made up of individual rafters and that are connected to a top beam. The beam, or the ridge, is the central part of the structure, as all the framing must be connected to it.

What?s the difference between Peel and stick roof?

But today, peel and stick roof underlayment is quickly becoming the norm, especially in hot and humid areas. Unlike traditional underlayment, synthetic peel and stick roof underlayment is much more durable.

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