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Database & Data Warehouse Assignments
Database & Data Warehouse Assignments

Corporate PPT Template
Corporate PPT Template

...  Huge tablespaces could be separated for maintenance (backup&recovery) reasons  Users still have single point for storing data ...
Remembering the Past With Organizational Memory
Remembering the Past With Organizational Memory

... column is single-valued • Entries in columns are from the same domain and relate to the same attribute …name, address • Each row is unique and has a unique key. • The sequence of columns is insignificant. • The sequence of rows is insignificant. ...
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Introductory slides for JDBC & Java Servlets

... DatabaseMetaData: contains information about the database ...
Corporate PPT Template - Universidad Nacional De Colombia
Corporate PPT Template - Universidad Nacional De Colombia

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... function) is a set of PL/SQL statements you can call by name. Stored functions are very similar to procedures, except that a function returns a value to the environment in which it is called. User functions can be used as part of a SQL expression. Use the CREATE FUNCTION statement to create a standa ...
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Introduction to Structured Query Language

... l An empty field has a well defined value: null. Null is not the same as an empty string or zero—null is a distinct value. ...
Procedure to Setup Microsoft SQL Server 7
Procedure to Setup Microsoft SQL Server 7

... Select radio button “Others” Type the DSN that was created earlier (Example : PMCS_PRI) Specify the login name & password for “Administrator” as shown below. ...
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Official Cert Guide for Popular Oracle 1Z0

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... This sounds similar to myth number 2, and in some cases the reasoning is the same, but is worth a separate mention because it is so common. I have seen several major performance issues fixed by actually removing indexes from tables. In some cases they may have made an improvement on the particular q ...
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Information Systems

... the formulas that we can create and store in cells – When a formula is stored in a cell, the result of the formula is displayed in the cell – If we’ve set up the spreadsheet correctly, we could add or remove tutors, add additional weeks of data, or change any of the data we have already stored and t ...
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Course: CPS 2231-01 Computer Organization and Programming

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... FoxPro stores application data in freestanding files (using a .dbf extension), each representing a single logical table. In addition to data files, Visual FoxPro maintains indexes for each table in separate files that have a .cdx extension. As a result of this technology, queries against large datab ...
ColumnarDatabaseExperiencesV5 5390KB Feb 10 2014 12:05
ColumnarDatabaseExperiencesV5 5390KB Feb 10 2014 12:05

MySQL Fundamentals - Kirkwood Web Certificate Server
MySQL Fundamentals - Kirkwood Web Certificate Server

... What is MySQL? • MySQL uses Structured Query Language (SQL) • SQL is language for retrieving, updating, deleting, information from a database • Relational databases use a model that define data according to relationships • Other databases: Oracle, Informix, DB2 (IBM) Access (Microsoft), SQL Server, ...
Slide 1
Slide 1

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< 1 ... 180 181 182 183 184 185 186 187 188 ... 318 >

SQL

SQL (/ˈɛs kjuː ˈɛl/, or /ˈsiːkwəl/; Structured Query Language) is a special-purpose programming language designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).Originally based upon relational algebra and tuple relational calculus, SQL consists of a data definition language, data manipulation language, and a data control language. The scope of SQL includes data insert, query, update and delete, schema creation and modification, and data access control. Although SQL is often described as, and to a great extent is, a declarative language (4GL), it also includes procedural elements.SQL was one of the first commercial languages for Edgar F. Codd's relational model, as described in his influential 1970 paper, ""A Relational Model of Data for Large Shared Data Banks."" Despite not entirely adhering to the relational model as described by Codd, it became the most widely used database language.SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987. Since then, the standard has been revised to include a larger set of features. Despite the existence of such standards, though, most SQL code is not completely portable among different database systems without adjustments.
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