Search results “Datum sql oracle”
SQL 11: MySQL SELECT, SQL funkcie, naformátujem ti dátum, peňáz, text
Nový kurz "SQL databázy: MySQL a SQLite" http://brm.sk/817/kurz-sql-relacne-databazy-mysql-sqlite Každý deň sem šupnem jedno nové video, až do vydania kurzu. Medzičasom hoď like sem https://www.facebook.com/yablko.smrdi nech si informorvaný. A subscribe, šak sme na youtube, robme youtube veci, dík:) hit leta https://soundcloud.com/yblk/smrdi-mi VŠETKO o kurze tu http://brm.sk/817/kurz-sql-relacne-databazy-mysql-sqlite --------- Sleduj ma 📸 INSTAGRAM https://instagram.com/yablko 👍 FACEBOOK https://www.facebook.com/yablko.smrdi 🐦 TWITTER https://twitter.com/yablko 📚 BLOGY https://medium.com/@yablko --------- Naučím ťa programovať 🕸 HTML a CSS kurz http://bit.ly/WebdizajnKurz ⌨ Základy programovania kurz http://bit.ly/ZakladyOOP ☕ JavaScript kurz http://bit.ly/JavaScriptKurz 😂 Humor http://bit.ly/doleziteUmenie Všetko na http://yablko.sk Programovanie na http://brm.sk Kurzy na https://www.learn2code.sk
Views: 1055 Yablko
SQL Tutorial - 45: Date & Time Functions (Part-1)
In this tutorial we'll see how we can add dates, subtract dates, view current date and current time using ADDDATE(), SUBDATE(), CURDATE() and CURTIME Functions respectively.
Views: 33993 The Bad Tutorials
SQL Date Comparison - How to filter Datetime in SQL Server - SQL Training Online
http://www.sqltrainingonline.com SQL Date Comparison - How to filter Datetime in SQL Server - SQL Training Online In this video, I show you how to do a SQL Date Comparison in SQL Server when your Datetime has an actual time in it. I also include the latest trick that will make this easier if you are using SQL Server 2008 or SQL Server 2012. How do you compare a Datetime in SQL Server? A SQL Datetime stores both Date and Time. So when you are filtering using the SQL Where clause, you have to know if you Datetime is storing the time also. Let's take a look at the employee table in SQL Training Online Simple DB The column we are looking at is the hire date. I want to go after the person who was hired on February, 22 2005. So, I use the following SQL. select * from employee where hire_date='02/22/2005' Now, this works because we don't have any times stored in this column. But, if I change the record from 2005-02-22 00:00:00.000 to 2005-02-22 08:22:25.000 and rerun the query, you see that I don't get any results. That is because the value of 02/22/2005 is really 2005-02-22 00:00:00.000 and I just changed the hire_date to include a time other than 00:00:00.000. So, I have to tweak my query to use a greater than and less than sign. This works. But, to really understand what is going on, let me show you what SQL Server really sees. There are other ways, and in this StackOverflow article you can read more about these other ways. But, I want to point out a few. If you are working in SQL Server 2005 or earlier, the following is supposed to be the fastest performing way to do this. select datediff(dd,0, hire_date),* from employee where dateadd(dd,0, datediff(dd,0, hire_date)) = '2005-02-22' But, if you are working in SQL Server 2008 or SQL Server 2012, they have introduced an actual Date datatype that doesn't include the Time portion. Since this is the case, you can use the CAST function to remove the time from the Datetime. Here is the SQL to do that. select * from employee where CAST(hire_date AS Date) = '2005-02-22' And that's it. If you enjoy the video, please give it a like, comment, or subscribe to my channel. You can visit me at any of the following: SQL Training Online: http://www.sqltrainingonline.com Twitter: http://www.twitter.com/sql_by_joey Google+: https://plus.google.com/#100925239624117719658/posts LinkedIn: http://www.linkedin.com/in/joeyblue Facebook: http://www.facebook.com/sqltrainingonline
Views: 27314 Joey Blue
http://www.learningsqlserver2008.com/ https://youtu.be/KmsmPOImpHo - Date functions in SQL Server 2012 GETDATE -- Today's date DATEADD - adding time interval to an existing Date DATEPART - return part of the date like year or month DATEDIFF - Give you the different between two dates DAY - returns the day of the month MONTH - return the Month of the Year YEAR - returns the year in the Sql expression CAST - Converts an expression of one data type to another in SQL Server 2008 R2 CONVERT - Convert expressions of one data type to another in sql server r2 SQL Tutorial
Views: 56782 baghul
SQL Cast-Funktion - SQL Tutorial #DEUTSCH/GERMAN
Java lernen: bit.ly/JavaLernen Typo 3 lernen: http://bit.ly/LerneTypo3 In diesem SQL Tutorial erfahrt Ihr wie man eine Cast-Funktion in SQL schreibt und was diese macht. Nachdem Ihr dieses Video geschaut habt solltet Ihr also dazu in der Lage sein ein Datum in einen varchar zu casten und zwei Felder miteinander zu verketten.
Views: 556 BrainTrainTV
SQL Substr-Funktion und to_char - SQL Tutorial #DEUTSCH/GERMAN
Java lernen: bit.ly/JavaLernen Typo 3 lernen: http://bit.ly/LerneTypo3 In diesem SQL-Tutorial lernt ihr wie man aus einem Datum ein Teil des Strings auslesen könnt z.B dem Monat, mithilfe der substr-Funktion. Das to_char wird hier verwendet um das Datum in einen String umzuwandeln was ihr nachdem Video auch können solltet.
Views: 319 BrainTrainTV
SQL Replace Funktion -  SQL Tutorial #DEUTSCH/GERMAN
Java lernen: bit.ly/JavaLernen Typo 3 lernen: http://bit.ly/LerneTypo3 In diesem Video wird die Replace Funktion beschreiben in SQL-Sprache. Nachdem ihr dieses Video geschaut habt solltet ihr die Replace Funktion in sql beherrschen und anwenden können.DOWNLOAD MusterDB: http://www.file-upload.net/download-10852285/MusterDBTeil1.txt.html Dokumentation: http://docs.oracle.com/cd/B28359_01/server.111/b28286/toc.htm
Views: 805 BrainTrainTV
SQL Tutorial DEUTSCH/GERMAN - Select im bestimmten Zeitraum + Sortierverfahren
Jetzt Java lernen: http://bit.ly/JavaLernen Typo 3 lernen: http://bit.ly/LerneTypo3 In diesem Video wird gezeigt wie ihr in SQL eine einfache Select Anweisung schreibt die nur Sachen selektiert die in einem bestimmten Zeitraum bzw. die einen bestimmten Zeitstempel haben, in dem selben Querie lernt ihr noch wie man die ausgewählten Felder dann mit Hilfe einer Zeile nach Datum sortiert!
Views: 300 BrainTrainTV
Aggregatfunktion Count (SQL)
Die Aggregatfunktion count mit all ihren Möglichkeiten.
Views: 3155 RBSUlmTG
SQL Server 4 - Beginner Terms Part 1
In order to be successful as a database developer, you need to speak the right language. I'm not talking about SQL or some programming language, I'm talking terminology. It is important to familiarize yourself with the most common terms as these terms allow us to communicate with other people in our field. Data - The role of a database is to store data. Data is the plural form of the word datum. If we had to define datum, we would say it is an individual fact or piece of information. This means that data is a collection of facts and information. Database - A collection of data. Database Management System (DBMS) - A software that it is capable of storing and interacting with that data. The software is also capable of presenting this data in some way that is user friendly. Even if our data is stored all over the computers secondary memory (SSD or HDD), the database will take the data and present it to us in an organized fashion, such as in a table. SQL Server is an example of a DBMS. In all reality, the distinction between a database and a DBMS is so small that most people use the terms interchangeably. Relational Database Management System (RDBMS) - A relational database is a type of DBMS. This means that all RDBMS are DBMSs, but not all DBMSs are RDBMSs. There are many other types of databases. A relational database presents our data in tables. Relation - This is a fancy pants word that means table. Table - A way to present data that has columns and rows. Columns say what data needs to be inserted and each row will insert data for every column. A database will often have numerous tables. A row can also be called a record. Where a specific column and row intersect is called a field, or a cell. Sometimes, we can fill out all of the information out for a row, but leave certain fields empty. If we do this, the field is said to be null. Null - The absence of a value. Database Design - Because our data is stored in tables, we have to go through an important process known as database design. In order for a database to work the way we intend for it to work, we have to design things. What data should we store, what tables do we create? What columns go in what tables? How are tables related? How do we ensure that our database is up to date? How do we protect our data? All of these questions bring up the concept of data integrity. This is the key term we will start with in the next video. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 3391 Caleb Curry
SQL String Funktionen
Hier werden Standard SQL Funktionen erklärt, die man alle nicht im ABI braucht.
Views: 1272 RBSUlmTG
Fonction SQL ORACLE - MAX et MIN
Fonction SQL ORACLE - MAX et MIN. Une petite présentation des deux fonctions MAX et MIN. Abonnez-vous à la chaîne pour ne pas manquer mes prochaines vidéos. N'hésitez pas à me suivre sur: Site Web: http://www.courssql.com Facebook: https://www.facebook.com/CoursSQL Twitter: https://twitter.com/Cours_SQL Google+: https://plus.google.com/108599494665250923662/posts
Views: 253 Cours SQL
Oracle 11g - návod na připojení přes SQL Developer
Návod na připojení do Oracle 11g databáze LSD SPSE Ječná, přes SQL Developer
Views: 903 LSD SPŠE Ječná
The BETWEEN operator selects values within a range. The values can be numbers, text, or dates.
SQL #11 - SQL-built-in Funktionen
In diesem Tutorial zeige ich euch die Funktionen, die uns SQL schon selbst mitliefert. ❤❤❤ Früherer Zugang zu Tutorials, Abstimmungen, Live-Events und Downloads ❤❤❤ ❤❤❤ https://www.patreon.com/user?u=5322110 ❤❤❤ ❤❤❤ Keinen Bock auf Patreon? ❤❤❤ ❤❤❤ https://www.paypal.me/TheMorpheus ❤❤❤ 🌍 Website 🌍 https://the-morpheus.de ¯\_(ツ)_/¯ Tritt der Community bei ¯\_(ツ)_/¯ ** https://discord.gg/BnYZ8XS ** ** https://www.reddit.com/r/TheMorpheusTuts/ ** ( ͡° ͜ʖ ͡°) Mehr News? Mehr Code? ℱ https://www.facebook.com/themorpheustutorials 🐦 https://twitter.com/TheMorpheusTuts 🐙 https://github.com/TheMorpheus407/Tutorials Du bestellst bei Amazon? Bestell über mich, kostet dich null und du hilfst mir »-(¯`·.·´¯)-» http://amzn.to/2slBSgH Videowünsche? 🎁 https://docs.google.com/spreadsheets/d/1YPv8fFJOMRyyhUggK8phrx01OoYXZEovwDLdU4D4nkk/edit#gid=0 Fragen? Feedback? Schreib mir! ✉ https://www.patreon.com/user?u=5322110 ✉ https://www.facebook.com/themorpheustutorials ✉ https://discord.gg/BnYZ8XS ✉ [email protected] oder schreib einfach ein Kommentar :)
SQL Developer starten und Verbidung herstellen - Tutorial #DEUTSCH/GERMAN
Java lernen: bit.ly/JavaLernen Typo 3 lernen: http://bit.ly/LerneTypo3 In dem Video zeige ich euch kurz und knapp wie ihr nachdem ihr den sqldeveloper gestartet habt eine Verbindung herstellt. Nachdem Ihr dieses Video gesehen habt solltet ihr eine Verbidung im sql Developer herstellen können und somit anfangen können eure ersten Querys zu schreiben / programmieren.
Views: 6527 BrainTrainTV
SQL,  How to insert date data type, lesson 14
14th video of the series, learning structured Query Language. How to insert date data type into a column. Using oracle platform.
Views: 41731 hammadshams
Power BI direct connect to SQL database (7-3)
This video is part of the Analyzing and Visualizing Data with Power BI course available on EdX. To sign up for the course, visit: http://aka.ms/pbicourse. To read more: Power BI service https://aka.ms/pbis_gs Power BI Desktop https://aka.ms/pbid_gs Power BI basic concepts tutorial: https://aka.ms/power-bi-tutorial To submit questions and comments about Power BI, please visit community.powerbi.com.
Views: 38752 Microsoft Power BI
SQL Case Anweisung -  SQL Tutorial #DEUTSCH/GERMAN
Java lernen: bit.ly/JavaLernen Typo 3 lernen: http://bit.ly/LerneTypo3 In diesem Video wird gezeigt wie man eine einfache case Anweisung in SQL schreibt und ausführt. Die Case-Anweisung in SQL ist kurz und knapp aber gut erklärt. Nachdem Video solltet Ihr also in der Lage sein eine einfache case-Anweisung in SQL zu schreiben.
Views: 743 BrainTrainTV
[#15] Verbindung zu einer Oracle DB mit PHP
In diesem Video baue ich mit PHP eine Verbindung zu einer Oracle Datenbank auf. Ich habe dafür den Quelltext des Kontakt-Formular-Beispiels aus den vorherigen Videos angepasst. Außerdem gehe ich kurz auf die Programme fileZille und SQLDeveloper ein. Im SQLDeveloper erstelle ich eine neue Tabelle und eine Sequenz. Quelltext: https://www.dropbox.com/s/n6dtxs3evspr6qk/Kontakt_Formular_Oracle.zip?dl=0 Oracle Datentypen: Kurzfassung deutsch: http://www.datenbank-sql.de/oracle-datentypen.htm Ausführlich (englisch): http://docs.oracle.com/cd/B28359_01/server.111/b28318/datatype.htm Wenn euch meine Videos gefallen würde ich mich über ein Abo freuen :) Fragen und Anmerkungen könnt ihr gerne in die Kommentare schreiben.
Views: 1111 gazica1
C# Tutorial 23: How to use DateTimePicker and save date in Database
Visual C# .NET Controls The Date Time Picker - Date Picker C# - How do I set my datetimepicker date? visual C# - DateTimePicker date to string C# How to compare the time of a DateTimePicker control and the How do I get value from Date time picker and Month calendar C# How to pass values to a dateTimePicker control‎ C# How to change DateTimePicker control to 24h time format ? Getting started with the DateTimePicker Visual Studio 2012 RC - Age calculation from Converting date time picker value into t_time type date time picker‎ - 7 posts DateTimePicker - Visual C# assign SYSTEMTIME to DateTimePicker Control‎ C#
Views: 303484 ProgrammingKnowledge
SQL Musterdatenbank und die ersten Queries mit  SQL TUTORIAL #DEUTSCH/GERMAN
DOWNLOAD MusterDB: http://www.file-upload.net/download-10852285/MusterDBTeil1.txt.html Dokumentation: http://docs.oracle.com/cd/B28359_01/server.111/b28286/toc.htm Java lernen: bit.ly/JavaLernen Typo 3 lernen: http://bit.ly/LerneTypo3 In diesem Video wird kurz erklärt wie man eine select Anweisung auf ein Feld einer Tabelle legt. Ebenfalls wird dir round Funktion erklärt. Nach dem Video solltet ihr also in der Lage sein ein Feld mit einer select Anweisung zu selektieren und ein Feld zu runden.
Views: 1767 BrainTrainTV
Oracle&Datum: SOA/BPM
Datum y Oracle dando conferencias sobre SOA y BPM en Hotel InterContinental, Guatemala, Guatemala
Views: 113 Deiby Gómez
Oracle Cloud Now - Teil 2: DBCS für Entwickler: 'Modern Apps' in der Oracle Cloud [2016]
Der Alltag des Entwicklers ist geprägt von sich immer schneller ändernden Anforderungen - im Unternehmen muss man aber häufig sehr lange auf eine Datenbank warten. Die Datenbank-Services der Oracle-Cloud stehen dagegen schnell bereit und bieten zusätzliche, enorme Vorteile: Fertige Web-Anwendungen mit APEX in kürzester Zeit, analytische SQL-Funktionen, räumliche Daten, JSON- und XML Verarbeitung, REST Services und vieles mehr. ---------------------------------------------------------------------------------------------- Weitere Informationen zum Thema als Foliendownload: https://apex.oracle.com/pls/apex/f?p=20225:2:111154456930966:APPLICATION_PROCESS=downloadFile:::F20225_ID:17290
Views: 405 OraCloudNow
Crystal Reports Tutorial Creating SQL Commands Business Objects Training Lesson 17.2
Learn how to create a SQL command in Crystal Reports by Business Objects at www.teachUcomp.com. Get the complete tutorial FREE at http://www.teachucomp.com/free - the most comprehensive Crystal Reports tutorial available. Visit us today!
Views: 159299 TeachUComp
Run SQL Query with Date Range filter in Excel
Run SQL Query with Date Range filter in Excel My SQL Blog: https://sqlwithmanoj.com/ Check my SQL FB Page at: https://www.facebook.com/sqlwithmanoj
Views: 11856 SQL with Manoj
How to use Sum, Avg and Count in Select Statement - SQL Server / TSQL Tutorial Part 128
How to use Sum, Avg and Count in Select Statement Scenario: Let's say that you have dbo.Customer table with SaleAmount column and you are asked to write a query that should return you sum of SaleAmount, Average of SaleAmount and Count of all the records. Solution: You can use Aggregate functions such as Sum, Avg and count in TSQL to find the answer of your question. Let's create dbo.Customer Table with sample data so we can use Sum, Avg and Count aggregate functions. Link to scripts used in SQL Server / TSQL Tutorial Video http://www.techbrothersit.com/2017/03/how-to-use-sum-avg-and-count-in-select.html Check out our website for Different SQL Server, MSBI tutorials and interview questions such as SQL Server Reporting Services(SSRS) Tutorial SQL Server Integration Services(SSIS) Tutorial SQL Server DBA Tutorial SQL Server 2016 DBA Tutorial SQL Server / TSQL Tutorial ( Beginner to Advance) http://www.techbrothersit.com/
Views: 1540 TechBrothersIT
Learn About DATUM & Information Value Management®
Learn about DATUM and our data governance software: http://www.datumstrategy.com/data-governance-software-ivm - "Looking for more than a "go-live" to deliver trusted data? - Are your processes dependent on data accountability? - Do your analytics and master data teams drive value together? - DATUM has the solution! - Information Value Management® - Data Governance & operating model design - Analytical Integrity - Business process optimization - Data management organization alignment - Technology deployment acceleration - Information Value Management® bridges the gap between data and business value
Views: 393 Datum LLC
Inteligencia de Negocios - Datum, S.A.
Demostración del software Oracle Business Intelligence.
Views: 149 DatumGuatemala
DateTime functions in SQL Server   Part 25
In this video we will learn about different DateTime data types, and different date time functions in sql server. We will also understand the difference between terms UTC (Coordinated Universal Time) and Time Zone offset. Text version of the video http://csharp-video-tutorials.blogspot.co.uk/2012/09/datetime-functions-in-sql-server-part-25.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-25-datetime-functions-in-sql-server.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 196204 kudvenkat
Metadata Management is Key to Data Governance Initiatives
Metadata Management is a key component of Data Governance initiatives. It is necessary for meeting regulatory compliance requirements, ensuring data quality and getting value from big data implementations. In this webinar, we discuss the importance of and challenges to and capabilities needed for implementing effective metadata management practices. We show how the semantic standards help to support the capture and governance of comprehensive and meaningful metadata. Finally, we demonstrate the metadata management capabilities provided in TopBraid Enterprise Data Governance (EDG) -- using a semantic standards-based approach.
Views: 616 TopQuadrant
Importing Data from SQL Server into Qlik (QlikView)
WCI Consulting presents: How To Import SQL Server Data into Qlik (QlikView) - Importing SQL Data through the Qlik (QlikView) Process - How to use the "Join" command - Modifying SQL script within the Qlik (QlikView) Edit Script Window - Viewing Qlik (QlikView) table structure * watch in HD to view the details ** more: www.wciconsulting.com/resources/qlikview-tutorial-videos
Views: 67886 WCI Data Solutions
SQL alapismeretek 02. Elmélet
SQL sandbox: https://www.w3schools.com/sql/trysql.asp?filename=trysql_select_all Teljes tanfolyam: http://sanfranciscoboljottem.com https://www.facebook.com/SanFrancisco... Magyarország első ténylegesen ingyenes IT tanfolyamainak csatornáján nincsenek apróbetűk, sem kötelezettségek. Nem kell személyesen megjelenned sehol, nem vagy időhöz kötve, és beszámolnod sem kell róla, hogy mit tanultál. Ha egy konkrét IT szakma érdekel, látogasd meg a honlapunkon a "Tanfolyamok" menüpontot, ahol ötletet kapsz, miket, és milyen sorrendben érdemes megnézned ahhoz, hogy képben legyél. Nem pedagógusok vagyunk, hanem lelkes programozók és mérnökök, ennek fényében pedig szeretjük a pozitív, lelkes hozzáállást. Amiben tudunk segítünk, és ezért cserébe csak a legjobb oldalatokat szeretnénk kérni.
SQL - Download und Installation einfach erklärt - alles was man für SQL braucht
WICHTIG: Bei der Installation wird nach einem Passwort gefragt dieses unbedingt merken!!! Mail-Adresse: [email protected] Passwort: Oracle123 Java lernen: http://bit.ly/JavaLernen Typo 3 lernen: http://bit.ly/LerneTypo3 In diesem Video wird kurz und knapp erklärt was Ihr braucht um in die Datenbankprogrammierung SQL einzusteigen. Es wird kurz gezeigt welche Sachen ihr euch runterladen müsst und wie ihr diese installiert.
Views: 3141 BrainTrainTV
Informatik 9 PLUS - SQL Modulo Funktion
In diesem Video anhand eines kurzen Beispiels gezeigt, wie man die Modulo-Funktion mod(a,b) in SQL verwenden kann, um beispielsweise numerische Einträge in einer Tabelle dahingehend zu überprüfen, ob es sich um eine gerade oder ungerade Zahl handelt.
Views: 368 InformatikEasyGoing
NEO Business Intelligence
www.neobi.cz | NEO Business Intelligence zpracuje data z vašeho účetního systému a ukáže vám je v souvislostech. Přehledné analýzy vám pomohou s rozhodováním a řízením firmy. Vyzkoušejte si software na 30 dní zdarma. Díky jednoduché instalaci a intuitivnímu ovládání se snadno dostanete k datům, která vás posunou k úspěchu. -- VideoBrothers s.r.o. | http://www.videobrothers.cz | http://www.facebook.com/videobrothers
2. Veri Tabanı Kavramları (SQL Server Management Studio Dersleri)
veri tabanı kavramını duymayanınız yoktur. neredeyse her alanda kullanılarak bilgi ihtiyacımızı karşılar. Veri tabanı kavramının açıklamasına geçmeden önce, söze, en temelden, Verinin tanımından başlayalım. Veri (datum) sayılar, rakamlar, sözcükler, metinler, resimler, olaylar vb. biçiminde temsil edilen ham gerçekliklerdir. Yani tek başlarına bir anlamları yoktur. Veriler bir arada belirli süreçlerden geçirildiklerinde, işlendiklerinde anlamlı hale gelerek Enformasyonu ve bilgiyi oluştururlar. Neyse konumuza dönelim. Veri farklı tür ve biçimdeki değerlerdir. Tablo ise verilerin bulunduğu hücrelerden oluşmaktadır. Bildiğiniz gibi iki boyutludur. Yani satır ve sütunlardan oluşmaktadır. Herhangi bir sütunda aynı tür verilerin saklıdır. Satırda ise herhangi bir varlığa veya nesneye ait ilişkili veriler bulunmaktadır. Mesela öğrenci tablosundaki bir kayıt herhangi bir öğrenciyle ilgili verileri barındırmaktadır. Satırlara aynı zamanda kayıt dendiğini de belirtmekte fayda var. Böylece aynı türden kayıtların bir araya gelmesi ile oluşan yapıya tablo denmektedir. Birbiri ile ilişkili tabloların ise bir araya gelmesi ile oluşan yapıya ise veri tabanı (database) denilmektedir Şimdi de veriler dosyalarda değil de neden tablolar halinde veri tabanlarında tutuluyor. Sorusunun cevabını birlikte arayalım. Veri tabanından önce programcılar verileri dosyaya kaydederken bazı sorunlar yaşadıkları biliniyor. Örneğin, Dosya kullanımında her bir uygulama için ayrıca tasarım yapılması gerekiyordu. Her uygulamada farklı dosya kullanımı veri tekrarına yol açtığı için bellek israfına ve veri bütünlüğünün sağlanamamasına sebep olunmaktaydı. Veri Bütünlüğünden kastım şu: düşünün ki aynı kayda ait verilerden bir kısmı farklı dosyalarda tutuluyor. Ve siz bu kaydı silmek isteseniz o kayıtla ilgili tüm dosyalardan verileri silmeniz gerekiyor. Diyelim ki bu aşamada bir hata oldu, bazı dosyalarda eksik ve kopuk veriler bulunacaktır. Diğer bir mesele, Veri Yapısına tam olarak sadece uygulamayı geliştiren programcı hakimdi. Programcı dolayısıyla verinin güvenliğinden de sorumluydu. Dosyalara Erişim Hızı yavaştı. Çok kullanıcı desteği bulunmuyordu. Arkadaşlar yeri gelmişken sıklıkla karıştırılan iki kavramı açıklamada yarar görüyorum. Veri tabanı ve veri tabanı yönetim sistemleri birbirinden farklıdır. Veri tabanı fiziksel olarak verilerin tutulduğu dosyalardır. Geleneksel dosya sistemlerinden farkını yukarıda açıklamaya çalıştık. Veri tabanı yönetim sistemi ise içinde çok sayıda veri tabanını, kullanıcıları, kullanıcı yetkileri ve diğer güvenlik araçlarını barındıran bir yazılımdır.
Views: 248 Sinan KUL
Use a Macro to automatically download data to Excel
How to create a Macro to automatically download data to Excel
Views: 23701 TimevalueVideos
Definition of a High Water Mark: What is a High Water Mark?
This video explains what a high water mark is, how a hedge fund uses one while calculating performance and what it means to the industry. We also cover why it was put into place by hedge fund managers for investors. If you want to learn more about hedge funds please consider downloading our free book on hedge funds at http://HedgeFundsBook.com or complete our online hedge fund training program at http://HedgeFundCertification.com
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