data vs information with examples

... from: iDATA.ws Chapter 6 Turning Data into Information 99To overcome these issues, ADO.NET includes the DataView class. As with the DataTable class, each DataView exposes a set of DataRow ... Chapter 6 Turning Data into Information 103Note In addition to creating custom DataView instances, each DataTable can have its own de-fault DataView. This data view, located at DataTable.DefaultView, ... conﬁrmed with the DataTable.AcceptChanges method. The DataRowView.Row property returns the actual row based on other settings in the DataRowView instance.Creating a DataViewTo create a DataView...

PHP-CURL Functions with Examples

Danh mục: Kỹ thuật lập trình

... curl_process( $data) { // set up transaction variables $debugging = 0; $key = $data[ "keyfile"]; $xml = $data[ "xml"]; $url = $data[ "host"] .':' $data[ 'port']; ... connection closes. PHP/CURL Book with Examples  <?php // Example custom_header.php // Get Secure Page from www.neteller.com // With Custom Header. // Copyright http://curl.phptrack.com ... // We'll be returning this transfer, and the data is binary $data = curl_exec($ch); // // Grab the jpg and save the contents in the $data variable curl_close($ch); // close curl resource,...

Manage the Explosion of Information with IBM Information Infrastructure

Danh mục: Phần cứng

... access to information Support information retention policiesSecurely share information Information Compliance Information Availability Information Retention Information SecurityIBM Information ... previous models With both SAS and SATA drive support you can store real-time critical data and offline archive data more efficiently Reduce business risk by protecting data with RAID 6 support ... Encryption Simplifies Information Security4© 2009 IBM CorporationBuilding a Smarter Planet with Dynamic Infrastructure Intro to Information Infrastructure13ProtecTier Data Deduplication...

Tài liệu Oracle SQL Jumpstart with Examples- P1 docx

Danh mục: Cơ sở dữ liệu

... The Data Definition Language (DDL) allows changes to “def-initional” data or metadata. Metadata is the data about the data. Metadata is the definition of data objects such as tables along with their ... SQL, having much to do with why SQL was invented in thefirst place. In short, SQL database access has evolved with data modelingtechniques, Oracle Database, and other databases. SQL is pronounced“sequel” ... contrary, theobject data model is excellent for access to unique data items withinlarge, highly complex data sets or groups of interlinked objects. Inother words, the object data model is much...

Tài liệu Oracle SQL Jumpstart with Examples- P2 ppt

Danh mục: Cơ sở dữ liệu

... Ora-cle Database 10 g and Oracle Database 9 i . Without further ado, let’s getstarted with Oracle Database 10 g . 2.1 New Features in Oracle Database 10 g Oracle Database ... system metadata, or the data about the data. Metadata contains table structures including columnnames, lengths, and datatypes, among many other things. The SYSAUXtablespace is new to Oracle Database ... contains pointers to data les. If data le pointers in the data les are behind the Controlfile pointers for the data les, then the data- files can be recovered using log file entries. When data les are up...

Tài liệu Oracle SQL Jumpstart with Examples- P3 docx

Danh mục: Cơ sở dữ liệu

... and some simple examples just to get into the swing of things. 4.1 The Basic SELECT Statement SELECT is the beginning of the SQL command for querying (retrieving) data from a database table, ... way to ask a question about the data in a database. Thus a SELECT statement is also called a querybecause it quite literally “queries” or asks questions of a database. Thereare several uses ... SELECT statement examples using theMUSIC schema. Note: Diagrams and scripts for the MUSIC schema are in Chapter 1 and Appendix A.Let’s begin with a query listing all the data in the MUSICCD...

Tài liệu Oracle SQL Jumpstart with Examples- P4 docx

Danh mục: Cơ sở dữ liệu

... Sorting Methods BEGIN vSPLIT := INSTR(pTIME,':'); vHOURS := TO_NUMBER(SUBSTR(pTIME,1,vSPLIT-1)); vSECONDS := TO_NUMBER(SUBSTR(pTIME,vSPLIT+1)); RETURN vHOURS+(vSECONDS/60);EXCEPTION ... plan to undo DML changes with a ROLLBACK com-mand, do not tamper with this setting.  ARRAY[SIZE] . Sets the number of rows SQL*Plus retrieves as ablock from the database. The default is ... architecture and is com-monly used with Web-based applications. The client tier is your Webbrowser; the middle tier is the HTTP Server; and the database tier is theOracle Database 10g Server. Each of...

Tài liệu Oracle SQL Jumpstart with Examples- P5 docx

Danh mục: Cơ sở dữ liệu

... CONCAT('Oracle',' Database 10g') = 'Oracle Database 10g''Oracle'||' Database '||'10g' = 'Oracle Database 10g''My name ... between differentdatatypes.2. The more important and less obvious is that conversion functionsallow the combination of different datatypes into expressions toproduce a single datatype result.The ... Functions9.2.4 Datatype Conversion FunctionsBefore we get to examples and combining of functions, where we often useconversion functions, we will describe the most useful datatype conversionfunctions....

Tài liệu Oracle SQL Jumpstart with Examples- P6 pptx

Danh mục: Cơ sở dữ liệu

... DEFAULT 0;vSPLIT INTEGER DEFAULT 0;vHOURS INTEGER DEFAULT 0;vSECONDS INTEGER DEFAULT 0;BEGINvSPLIT := INSTR(pTIME,':');vLEN := LENGTH(pTIME);vHOURS := TO_NUMBER(SUBSTR(pTIME,1,vSPLIT-1));Figure ... summarize data into multiplevalues based on a sliding window of rows using an analytic clause.These structures are used most frequently in data warehousing toanalyze historical trends in data. ... thosecontained within this chapter. However, some highly complex mutablejoins can be simpliﬁed with the use of subqueries. Chapter 12 examinessubqueries.The next chapter shows you how to summarize data...

Tài liệu Oracle SQL Jumpstart with Examples- P7 pdf

Danh mục: Cơ sở dữ liệu

... MAXVALUEORDER BY CONTINENT_ID;Oracle Database 10g now allows both FLASHBACK DATABASEand FLASHBACK TABLE operations, as in the following syntax:FLASHBACK [ STANDBY ] DATABASE [ database ]TO { SCN | TIMESTAMP ... more SQL com-mands that change data. A transaction begins when you execute an SQLcommand, changing something in the database. As you make furtherchanges to table data, you execute additional ... ROLLBACKcommand when you do any one of these things:1. Save your changes to the database with the COMMIT command.2. Undo your changes with the ROLLBACK command. Chap15.fm Page 317 Thursday, July 29, 2004...

Tài liệu Oracle SQL Jumpstart with Examples- P8 docx

Danh mục: Cơ sở dữ liệu

... chapter deals with making changes to the database usingDML commands to add, change, and remove data. We begin with theINSERT command. Figure 15.5 Two Updates to theSame Row with aSAVEPOINTLabel ... on the fly, based on data content, and more specifically based on the content of a database. Thecontent of a database is flexible in terms of what information is stored inthat database. Therefore, ... Complex and Object Datatypes 16.2 Complex and Object Datatypes From my perspective, a complex datatype is any datatype not containing asingle scalar value. Thus a complex datatype can be a...

Tài liệu Oracle SQL Jumpstart with Examples- P9 ppt

Danh mục: Cơ sở dữ liệu

... included to present the usefulness of XML with respect to both Oracle Database and relational databases in general.The next chapter will begin coverage of Data Deﬁnition Language (DDL)commands ... be changed in an Oracledatabase.17.2.2 XML and the DatabaseIn this section we examine XML and Oracle Database in three ways: (1)creating new XML documents in the database; (2) retrieving ... for platform-independent transferbetween multiple databases. However, there are other, faster methods forachieving this task with Oracle Database.The beauty of XML is its potential object...

Tài liệu Oracle SQL Jumpstart with Examples- P10 docx

Danh mục: Cơ sở dữ liệu

... to any data item in a database, thus it can point to other tables. SCOPE IS simply limitssearching to a single table. WITH ROWID. This option stores a ROWID pointer value with aREF datatype ... with JoinsModifying data through a view that joins two tables is tricky. In addition toall the rules that Oracle Database 10g imposes on simple views, there arestill more rules for views with ... What are metadata views?There are various examples of views in other chapters. This chapterdescribes views in detail. A view is an overlay onto one or more other data sources. A data source...

Tài liệu Oracle SQL Jumpstart with Examples- P11 doc

Danh mục: Cơ sở dữ liệu

... fol-lowing tasks:  Exporting and importing data.  Shutting down and starting up the database.  Database recovery.  SYSTEM . SYSTEM is the database administrator. This user is fre-quently ... in a remote database when you includea database link in the deﬁnition of the synonym. A database link is adirect gateway from one database to another database.  Simpliﬁed SQL code . Code ... chapter).  Monitoring database activity and performance.  Adjusting database parameters (usually to improve performance).  Adding more space to the database.  Feature-Related...

Tài liệu Oracle SQL Jumpstart with Examples- P12 pptx

Danh mục: Cơ sở dữ liệu

... Changing Data in PL/SQL 549Chapter 24Now let’s describe some small facts about changing data from withinPL/SQL blocks.24.5 Changing Data in PL/SQLNot only can data in tables be changed from within ... Metadata Views23.4 Metadata ViewsThis section simply describes metadata views applicable to users, privileges,and roles. Chapter 19 describes the basis and detail of Oracle Databasemetadata ... USER_USERS. Information on the logged-in user. ALL_USERSand DBA_USERS detail information for all users currently existingin the database. USER_SYS_PRIVS. Granted system privileges. USER_TAB_PRIVS[_MADE|RECD]....