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Databases Articles

SQL Data Manipulation: Select Insert Delete and Modify SQL data - ...eate that now with the following statement: mysql> CREATE DATABASE dmlexample; Once created, we need to specify that we wish t...
Relational SQL Databases - ...te also that every row of data in the primary key must be unique to one another. Here is the statement required to create our database (called gam...
SQL Data Import Methods - ...we use \N to specify a field that contains NULL and an extra tab is required after each row of data to signify the end of that row. We have saved ...
Joining SQL Tables - ...them (although when the statement is executed the actual data is compared). For an example of how we can use joining, let's look back to the...
Basic SQL syntax: Creating and Modifying tables and databases - ... there are two databases already created in the MySQL server. The mysql database contains administration information for the MySQL server and s...
Introduction to SQL - ...hat would have 100% support of the SQL standard. Let's first look at some simple interactions that we can perform using the SQL language. Le...
What Is a Database - ...ins a player's name, age, and e-mail address. Once you have tables defined in your database, you can then add records into the tables. A record...
Installing MySQL Server - ... If you choose to install MySQL in a different folder than the default (C:\MYSQL) or you wish to start MySQL on NT/Win2000 ...
Data Entry and the Various Industries that use this Service - ...efficient. About data entry service Based on the types of business process, today you will find a wide array of data entry services,...
Different Forms and Variations of Data Entry - ...In general, data entry can be differentiated into two major forms - online and offline data entry. When you enter data online, you can do it f...
How Data Entry Services Benefit Industries And Why It Is Essential - ...customers, your market, and the other factors that can affect your business, better chances you have to understand your business. Here comes the requi...
How to check Oracle processes in windows using command line - ...mmand is very useful to administrating and monitoring oracle in unix/linux systems for all Oracle DBA. But there is no command available in wi...
What is meant by dirty data - ...ou to reach more of your prospects more efficiently, and close more revenue. Databases with incomplete information are not uncommon, particula...
Software and Databases Managers - ...ary that nevertheless utilizes card files, you've worked with one kind of non-computerized database: one that illustrates perfectly the advantages of ...
How a Database Stores Data - ... field and corresponding pointers that give the location of every report within the databases file. If duplicate values are discovered, every duplicat...

Latest "Databases" Articles


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Software and Databases Managers (08/31/2010)
(...) And that's exactly the advantage of the computerized database: It shops data that could be accessed and manipulated in many different ways. Numerous programs that we don't think of as databases really involve some kind of database management. One reason why digital spreadsheets this kind of as Lotus 1-2-3 and Excel have become so popular is that, in addition to becoming capable of calculating complicated mathematical formulas, they can sort and extract both mathematical and textual information. (...)
How a Database Stores Data (08/31/2010)
(...) These branches break logical divisions from the index file into progressively more compact halves. For example, A-M represents one of the very first two branches from the tree and N-Z represents one other primary branch. A b-tree lookup lets a databases search a million-entry index by checking only 20 sets of nodes instead of every from the one million nodes. (...)
What is meant by dirty data (06/09/2010)
(...) If you're in business, a database should reduce your costs or increase your revenues. If your organization is non-profit, a database should either reduce your costs, enable you to provide more service for the same cost, or enable you to provide more effective service immediately. No matter what industry you belong to, what your company background is, or which business you are involved in, database appending is always going to help you. (...)
How to check Oracle processes in windows using command line (11/16/2009)
(...) Alternate of ps command in windows (Great tip for Oracle DBA): No it is not TRUE. Really !!! Windows has own command to trace all running processes in the system. Using "tasklist" command Oracle DBA can able to trace all running processes in windows including oracle,sqlplus,exp,imp and others. (...)
Data Entry and the Various Industries that use this Service (11/10/2009)
(...) About data entry service Based on the types of business process, today you will find a wide array of data entry services, e.g., Online/Offline Data Entry, Legal Document Entry, Insurance Claim Entry, Card/Book/Image Entry. (...)
Different Forms and Variations of Data Entry (11/10/2009)
(...) You need to enter images to include photographs and attachments in magazines, yellow pages, novels and E-books. Scanned images are also required for card entry and in official file access. Another type of data entry is the insurance claim entry. (...)
How Data Entry Services Benefit Industries And Why It Is Essential (11/10/2009)
(...) But the requirement is same - organizing data properly for future use. Apart from online and offline data entry, the data entry services also include image entry, book entry, card entry, hand-written entry, legal document entry and insurance claim entry. Data entry services are not only required to enter data into your business database. (...)
Introduction to SQL (01/04/2008)
(...) " When this query is executed, the database would then return the password (which is geo321) from the user with the username george. So what would happen if there were two users with the username george? Well, the database would return a recordset (there is the possibility of getting an actual array to the programming language, but it must first be retrieved row-by-row from the database via the recordset object) containing the passwords for the records that it found. Unless you specifically want users to have the same usernames, the best way around this would be to check for duplicate usernames when you are inputting the users' data into your game or defining the username as a primary key. (...)
What Is a Database (01/04/2008)
(...) This is usually accomplished by means of unique identification numbers, although this identification can be done with any data type, but the most effective way is to do it with number types. Therefore, each record that is added to a table in a relational database will be automatically assigned a unique number if the field is numeric and if a sequence and a trigger is defined to the table to do that. There are database packages that can do this almost automatically by defining that the field is an identity field. (...)
Installing MySQL Server (01/04/2008)
(...) cnf file. You can use this as a template to create your own my.cnf file. (...)
Basic SQL syntax: Creating and Modifying tables and databases (12/20/2007)
(...) Note The following table lists the length and character restrictions that are imposed on the names of databases, tables, columns, and aliases. Identifier Max Length Valid Characters Database 64 All valid directory name characters except "." and "/". (...)
Joining SQL Tables (12/12/2007)
(...) player = 'Henry'; So first we are selecting all the data from both the playerdata and relateenemies tables and then placing a condition upon the joining of the tables, so that data will only be selected where the username field in the playerdata table is equal to the enemy field in the relateenemies table. If we just left it with the single condition, it would return the full results from both tables for each enemy in the relateenemies table. So our second condition limits the results to only show Henry's enemies by comparing the player field in the relateenemies table to the string Henry. (...)
Relational SQL Databases (12/06/2007)
(...) This is done by means of a link table. A link table is really just a normal database table, but its main purpose is to relate data in some way or another to conserve space and optimize the way the database accesses the information. Let's create two link tables, one for relating friends and one for relating enemies to each other. (...)
SQL Data Import Methods (12/06/2007)
(...) If we now select all the information from the playerdata table, we can see that our five rows of data have been imported correctly into the database. Importing from a Native Source Another method available to use for importing data is using the Microsoft Excel spreadsheet program or any other application that can export data as tab-delimited data. For this example, however, we will use Microsoft Excel. (...)
SQL Data Manipulation: Select Insert Delete and Modify SQL data (12/05/2007)
(...) co.uk', NULL) Notice how the feedback from the console tells us that one row has been affected. Hence, we have added one row to our sampletable table. (...)

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