Index For Database Tables

Efficiency in Database Design - Part 2 Division 3

Introduction This is part 2 of my series Efficiency in Database Design. I assume that you have read all the different parts of the series up to this point. In this part of the series, we look at what is called, Index in database tables. An index makes your database tables to operate fast.

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What is an Index? An index is a DBMS object that can be set on one or a group of columns of a table. It can be set on a single column, such as a single primary key; it can be set on a group of columns, such as a composite primary key. You can have more than one index for a table.

Uses of Index Index can be classified as two types: normal index and unique index. Assume that you have a table already stored in a database. You can make the DBMS display the table data on the screen the way it was recorded. However, this is usually not what you will do. You will usually be displaying your table in a sorted order (alphabetically), based on a column. If the normal index is set on the column on which the sorting will be based, then the table data will be retrieved faster then if the index was not set.

An index has a lot of information about your table. Assume that you want to retrieve only a particular row: You need to identify that row with the table primary key value for that row. If an index has been set on the primary key column, then the row will be retrieved faster than if no index was set.

You can program your DBMS to link your tables in the database (disk) by certain columns (especially keys). You may want to display data from the two tables, based on the linked columns. If these linked columns were index, then the retrieval of the data would be faster than if they are not indexed.

A primary key has to be unique. However, if the user decides to type in two of the same values in the primary key column, what will you do? You can prevent this. To prevent this, set the unique index on primary key column of your table. You can also use the unique index to force any other column to be unique.

You DBMS documentation will tell you how to set index on a column. You can set an index on any column. If you want your database to operate fast, then set indexes on all your tables.

Summary of Index Uses - Maintains uniqueness of columns especially keys. - Speeds data retrieval on indexed columns. - Ordering of rows. - Speeds joining of tables on indexed columns

Disadvantages of Indexing - Uses extra disk space. - Many indexes slow down updating process of the table - For small (short) tables there is no gain in speed.

Advice So, as a database designer which columns should you index? Should you index at all? There is no exact solution for this. Take my advice as follows:

- Define a unique index on a primary key. - Index all foreign keys. - Want to insist on unique values for a column, index that column. - Index frequently searched columns. - Index columns that frequently determine the sort order. - The longer the table, the likelihood that it should have indexes.

That is it for database indexes. We take a break here and continue in the next part of the series.

Chrys

To arrive at any of the parts of this division, type the corresponding title below in the search box of this page and click Search (use menu if available).

Designing Database Tables - Part 13 Designing Database Tables - Part 14 Designing Database Tables - Part 15 Designing Database Tables - Part 16 Designing Database Tables - Part 17 Designing Database Tables - Part 18 Designing Database Tables - Part 19 Designing Database Tables - Part 20 Designing Database Tables - Part 21 Designing Database Tables - Part 22 Designing Database Tables - Part 23 Designing Database Tables - Part 24 Designing Database Tables - Part 25 Designing Database Tables - Part 26 Designing Database Tables - Part 27 Designing Database Tables - Part 28 Designing Database Tables - Part 29 Designing Database Tables - Part 30 Designing Database Tables - Part 31 Designing Database Tables - Part 32 Designing Database Tables - Part 33

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Glass Coffee Table Blend of Beauty and Versatility

Glass coffee table is among the most vital pieces of furniture that has the power to create a mesmerising effect on the interior dcor of your home. In the earlier days, such tables were to be found in homes of the rich and affluent. Today these tables can be afforded by one and all as there are a number of online sites that offer a huge variety of coffee tables.

Amazing Varieties

Known to accentuate the appearance of any living room, a glass coffee table is a functional table that is both beautiful and useful. Nowadays, these tables are available in an array of designs and materials which can compliment any type of dcor.

Different finishes: Glass coffee table is available in a huge variety of materials including wood, brass, chrome and steel. Some of the most elegant varieties of wooden base tables can be bought at attractive price rates from many of the online stores. Various types of decorative wood are also available today. The use of oak wood, cherry wood and stained wood is also quite popular these days.
Metallic legged tables appear sophisticated and chic. It can be placed in the centre of the living room to attract the attention of visitors. Chromed legged tables add a touch of beauty without being too overpowering.

Various shapes: The glass coffee table can be found in a range of attractive shapes and designs. Rectangular, square, circular and elliptical are some of the most popular shapes of these attractive tables. Most of the people choose these tables according to the dcor and the availability of space in their living room.

Different types of glasses: Various types of glasses are used for coffee tables today. Some of the most popular varieties include the frosted, etched, tinted and clear glasses.

Contemporary designs and styles: Today there is hardly any dearth for suitable designs and styles that can blend well with the other furniture in the room. Tables with brass finishes can be bought to add a classic touch to your living room. Wooden legged tables also create a rustic appearance to your beautiful living room.

To give an elegant and chic appearance to your living room, it is better to opt for stylish metallic framed glass coffee table. Today there are a number of designer tables to add panache to your home. These tables can also be bought from online stores though the prices can differ according to the materials and the designs of the table.

Decorating Your Glass Coffee Table

Though the glass coffee table is beauty personified, its appearance can be further magnified in different ways. Placing beautifully knitted rugs or mats under the table is one of the most attractive ways of highlighting your elegant furniture.

Placing flower vases and scented candles on the table is yet another method of elaborating the magnificence of these tables. Lovely coasters can also be placed on the tables.

Choosing the right type of furniture is not simple but with the right information and ideas, you can find the masterpiece furniture that you have been searching for.

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A Glass Coffee Table Is A Sign Of Elegance And Style

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Those who owned a glass coffee table some years ago are among the select few who can be said to have the wealth and the taste to keep the most necessitating cosmetic palate. It is only those who had the good taste and good fortune that could own them, as this was what they signified. That was why they could only be found in the most modern and upwardly mobile homes around the world.

Over the decades, things are no longer how they used to be. They have changed. These days, just about anyone can own a glass coffee table, unlike how it used to be. Why? They are now much more affordable that even the middle-class can use them as attractive living room pieces of furniture and still enjoy the feel of having good taste and class. Having a glass coffee table still shows a sign of elegance and style. These days they are now affordable for almost everyone.

Brass is what surrounds the classic glass coffee tables. Brass gives the reflective material much more gle am and brightness. Today, anyone can buy these pieces as antiques. If you don't want to buy them as antiques, you can still buy them brand new. Add the brass-accented coffee table to your room and get the wonderful glow it brings.
No matter how good your decor looks, it can be made to look better with the seemingly timeless tables. Of course, the glass coffee table can easily fit into any room and would not take away the general feel of the design of the room. The unostentatious feature of the table is elegant without being overmastering. That is why you can put a glass coffee table almost anywhere.

To show you how timeless these tables are, my glass coffee table was passed down to me from my beloved parents. That is why I love the piece so much. Sadly I don't use it now because my energetic and curious toddler is all over the place. I don't want her to get too energetic near that piece of glass as destruction can happen, if you know what I mean. This is one of the problems with having such special glass piece of furniture.

The technique I used the first time to get my toddler away from the glass coffee table didn't seem to work. I tried to always boom "NO" each time my todd ler neared the table, but this wasn't effective. Another technique I tried was to put a bummer around the glass table. Still it didn't work. The table just seemed to attract my daughter more and more.

My toddler just doesn't want to stay away from the table. I have stood guard many times with a constant supply of window cleaner which I used to clean up my daughter's fingerprints from the glass. But each time I took her away from the forbidden object, she just goes back to it like bees to honey. Now, I am running out of options. What I will do now is just to get my beloved glass coffee table away from her reach, until she has grown up. Then, my only worry will be her father!

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A Clear Choice - The Versatile Glass Coffee Table

We watch TV shows and movies, we eat, the kids socialize with friends and do homework, we take naps, and we hold parties. Outside the kitchen, it's the place that gets the biggest workout, at least in my home. The furniture needs to be comfortable, hold up to wear and tear, and for most of us, still convey a sense of style.

Why would I then select a glass coffee table for this space? It's an accident waiting to happen, you might say. But I've had more than one glass coffee table, and the fact that I've bought more than one shows that they work for me.

When I had a baby cruising the living room furniture, I was anxious about the hard-edged wood table we had. I found a wicker coffee table, one with soft, rounded edges and a glass insert for the table top. I did pause at the thought of adding glass to the equation with a toddler in the house. Instead, the rounded wicker was a safe choice, and the baby never tried to play with, sit on, or otherwise damage the tempered glass that was inset into the wicker surface. In fact, the glass top was a great surface for modeling clay or drawing paper. Cleanup was as easy as a wipe with glass cleaner and a paper towel.

When the kids got a little older, and we added furniture to the house, I did not hesitate to buy another glass coffee table. This time, I found the perfect one to place in front of my new sofa-a rectangle glass top with a rolled edge and a solid, wrought iron base that provided a shelf for books. Not only did it look great in the room, but I realized that this glass coffee table did not take up the visual space that a wood table might have. I had a full-sized glass coffee table, but because of its clear top and its wrought iron base, you could see completely through it. The great upholstery I picked for the sofa and the area rug was visible below the table were the starring elements in the decor. This glass table let me highlight the other design elements in the room.

Time came to outfit another room--this time, a smaller, more cozy space. What would look good in front of the antique love seat in my library? A small space called for less visual clutter. What did I find that fit the space? Another glass coffee table, this time, an oval inset in a bronze metal frame with slender support bars. Again, it takes up no visible weight, but still suits the decor of the room. My newest glass coffee table is light, so it's easy to move, and it's a snap to clean.

You can find a glass coffee table in nearly any size, to match any dcor. Look for them in wood with glass inserts, with a metal base that supports a floating glass top, on top of a wicker or rattan base, with contemporary geometric glass tops and a minimal metal frame, or even a trunk with a glass lid that provides a display space beneath its top surface. But to avoid injury in an unlikely accident, it's important to ensure that the glass is tempered, and that it sits solidly on its base.

Choosing a glass coffee table provides a versatile, easy-to-care-for, stylish addition to your home.

Author Jennifer Akre is an owner of a wide variety of online specialty shops including that offer both items and information on how you can easily furnish and decorate your space. Whether it is living room tables for your living room or tables for you newly remodeled home, there are many tips you can use to make any spot both functional and beautiful. Click today and indulge your senses.

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Media Glass Coffee Tables

On a recent visit to a friends house I was stunned to see this fantastic "Media" glass coffee table from Abode Interiors.

It's not that often I get excited about furniture but as soon as I saw this incredible glass coffee table I had to have one. At first I thought it must be plastic but was amazed to it was manufactured from a single piece of 12mm glass.

The size is perfect for my generous living room and I love the way I can place my newspapers and magazines in the drop shaped curve without cluttering the coffee table itself. I have seen many other glass coffee table that cannot touch this for style let alone value, I picked this up on line from abode Interiors for an incredible 224.99 with free delivery!

It arrived on the day I was told it would and packed in a neat MDF box that kept it safe and secure.

Abode Interiors do a wide range of modern coffee tables. This include bent glass coffee tables and also clear glass nest of coffee tables.

So your in the market for a designer coffee table and if like me finding that perfect contemporary piece seems all but impossible you should check this offering out from Abode Interiors.

This glass "Nest" coffee table offers superb versatility and setting options which is why I went for it. First of all the two smaller glass nests sit perfectly under the main rectangular coffee table when not in use, while further protecting them from dust and unwanted hand touches keeping them nice and clean for when you do get them out!

For me the nest coffee table was perfect as I use the two smaller tables on demand when guests visit while the main glass coffee table is perfect as a stand alone living room piece. One comment I would make is that all three of the tables look super slick on their own and as they are glass remain discreet, understated and stylish.

For those that are concerned about the strength and integrity of glass coffee tables do not worry. These Abode Interiors three glass nests are all manufactured from 19mm glass and are real heavyweights, you can tell they are quality from the weight and clarity you get through the glass.

The table arrived next day and was so well packed in a tidy MDF crate. Upon opening the crate plenty of protection was used inside to protect the glass. Come to think of it the packaging was almost as good as the table!

For me this glass nest coffee table is perfect! I've had it a few months now and it still looks fantastic!

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Adorn Your Living Room with Glass Coffee Tables

Coffee tables are often the centre piece of attraction in a living room. There are many types of coffee tables like glass coffee table, oak coffee table, metal coffee table and so forth. Coffee table is an important piece of furniture that is displayed in the living room in many homes. It is a simple yet elegant piece of furniture that has many uses too.

Glass Coffee Table-Different Varieties and Styles

Coffee tables made of glass are available in different styles and shapes. The tinted black colored glass coffee table is quite popular and in great demand due to its elegance and beauty. Another variety includes the frosted glass type and the clear glass type.

You can find a variety of shapes among these coffee tables. Some of the attractive shapes include rectangular, round and square shaped coffee tables made of glass. The oval shaped tables are also quite common and popularly used by interior decorators. In addition to different shapes, you can also find varying colors among coffee tables made of glass like brown, red, white and so forth.

Different types of glasses are also used on the glass coffee table. Though tempered glass is used for coffee tables to ensure strength and durability, the thickness of the glass may differ from one another. You can find a variety of these unique pieces of furniture in the online stores at quite reasonable rates.
Glass coffee table is available with metal and wooden support legs which can match well with different decors of homes. A sophisticated combination of metal and glass is quite distinctive and is considered an exclusive piece of furniture for any home.

Coffee tables with dark colored glasses appear particularly distinctive and attractive in a room that is painted in soft and light colors. You can also find exclusively designed coffee tables with carved statues of animals and birds. These undoubtedly add an aura of sophistication and class to your living room. It draws the attention of your visitors transforming it into a show piece rather than simple furniture. These tables can also be customised according to individual preferences and tastes.

Accessories That Magnify its Appearance

Besides being an attractive piece of furniture, the glass coffee table is also quite useful as it is used to serve light snacks to your v isitors. There are coffee tables which have shelves and racks underneath it where you can display beautiful items. To amplify the beauty of your coffee table, you can also use a beautifully knitted rug underneath the table.

Adding accessories on these tables will further accentuate its appearance. You can place flower vases or statues of different sizes and shapes as embellishments.

It is easy to find these tables in the online stores as there are a number of coffee table manufacturers who supply a variety of tables with glass tops. Online purchase of these tables is the best option as it gives you a variety to choose from at different rates. You can also avail discounts on different pieces of furniture which helps to save money and time.

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Glass Coffee Table

It is every persons dream to have a modern glass coffee table in their home.

Everyone loves to get applauded by their friends and visitors about their homes. Especially, if their home is fastidiously enriched with spectacular furniture and artistic styles with some addons such as a modern glass coffee tables. It is a nice compliment to almost any room in your home. It adds incredible charm with an air of coziness. You may want a collection of modern glass coffee tables with a wide range of designs and colors and with different sizes.

Different shapes of glass coffee tables are available with different sizes and designs. One can place round shaped table in your living room, square shaped table will suit your bedroom, rectangular shape for kitchens, and oval shapes are is best for your garden. And you can go for another color of glass, like a black glass coffee table for example.

It solely depends on your sagaciousness or choices to give your home a more sensational look to your visitors and friends. In a home having children, sharp edges are not advisable on your table, so a rounded shape is advised or oval shape will be perfect. It should be placed in the corner where children seldom pass it. You might find it to be more productive and your favorite conversation piece.

The very first thing you want to do while purchasing a glass coffee table is to be absolutely certain that glass is the only way you want to go. Glass coffee tables are great and elite addition to any living room, but there are a few things to be aware of before purchasing glass tables.

One is that glass tends to blur and smudge a bit easier than most coffee tables made of wood will. When looking for glass tables also be sure to determine as to whether or not it was made out of tempered glass. Tempered glass is different than normal glass in a way that it will not crack nearly as easily. Even if it does break it will do so in a manner as it will not be as harmful as normal broken glass is. To check if a glass table top is prepared from tempered glass, thoroughly check the glass top and look for the stamp of tempered glass over it.

Once you decide to purchase a glass coffee table there are many options to choose from as well as from where to buy. It doesn't matter from where you decide to purchase the glass coffee table make sure that you check out auction sites to see wide range of glass coffee tables available in the market with their prices.

Most of the sellers on auctions sites deal with high number so they can sell at a greatly discounted price. Always look for a dealer who works in selling glass coffee tables specifically and see what kind of great deals he/she is providing. Many times you can make an offer lower than what they advertised, and save money on the deal.

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