DBMS - Extended Operators in Relational Algebra DBMS - Relational Calculus DBMS - SQL Joins DBMS - Inner Vs. Outer Joins DBMS - Transaction & ACID Properties DBMS - Commit Point of Transaction DBMS - Keys DBMS - Normalization DBMS - What is Chomsky Normal Form? DBMS - What is PJNF? DBMS...
It is important to know about foreign key and the usage of it in different tables. This helps us to manage the queries by enabling the constraints concerning the primary keys. For example, we can give SET DEFAULT to foreign keys so that they will not be deleted unknowingly by any users. ...
Unlike relational databases that use primary and foreign keys to maintain relationships, non-relational databases rely on embedded documents and linking through references. They simplify queries and operations by reducing the need to join tables. Examples of popular non-relational databases are: ...
Oblac Jodd Jodd is set of open-source Java micro frameworks and tools; floppy size! Jodd = tools + ioc + mvc + db + aop + tx + json + html < 1.5 Mb. License: BSD 2, . Google Jimfs An in-memory file system for Java 7+. License: Apache 2 , . Spring batch Spring Batch ...
These tables can be linked or related usingkeys. Each row in a table is identified using a unique key, called aprimary key.This primary key can be added to another table, becoming aforeign key.The primary/foreign key relationship forms the basis of the way relational databases work. ...
keysforanassociativearray. Aninitializationclauseisnotrequired(orallowed). Whenyoureferenceanelementofanassociativearraythatusesa VARCHAR2-basedkey,youcanuseothertypes,suchasDATEor TIMESTAMP,aslongastheycanbeconvertedtoVARCHAR2withthe TO_CHARfunction. ...
The data-driven world of today requires a lot of data to function. A majority of the data is stored as databases, which is an organized collection of data. A database management system or DBMS in short acts as a bridge between the database and end-user to ensure that the data is well...
This is a fork of awesome link with new structure, additional license info and github's star info for every link, with a lot of new links (all non-mobile github projects with 390 or more star) and so on. The russian version is in this place. The "Hello Worlds examples" project is ...
* @param propName Name of the prop that react component expects. */ function findAttribute(attrs: string, propName: string): string { const index = Object.keys(attrs).find(attr => { return attr.toLowerCase() === propName.toLowerCase() || attr.toLowerCase() === kebabCase(propName...
Normally keyboard has 104 buttons called the keys. You can do various tasks through the keyboard. You can program, type, etc through keyboard only. Scanner The scanner is used to store photographs, picture, diagrams into the computer. It saves the image in the form of a file by r...