Skip to main content

MongoDB vs SQL

MongoDB vs SQL

MongoDB vs SQL
(Image by - Sharma Guides | Subham232330)


MongoDB

  • MongoDB is used to store both structured and unstructured data
  • Data stored in JSON-like documents
  • MongoDB does not support JOIN and global transactions
  • MongoDB is fast and scalable
  • Schemaless


SQL

  • SQL is used to store only structured data
  • Data stored in table form
  • SQL support JOIN and global transactions
  • SQL is slow
  • Require Schema



Comments

Popular posts from this blog

Indexing in DBMS

Indexing in DBMS Indexing is used to optimize the performance of a database by minimizing the number of disk accesses required when a query is processed.  The index is a type of data structure. It is used to locate and access the data in a database table quickly. Index structure: Indexes can be created using some database columns. The first column of the database is the search key that contains a copy of the primary key or candidate key of the table. The values of the primary key are stored in sorted order so that the corresponding data can be accessed easily.  The second column of the database is the data reference. It contains a set of pointers holding the address of the disk block where the value of the particular key can be found. Indexing Methods Ordered indices The indices are usually sorted to make searching faster. The indices which are sorted are known as ordered indices. Example: Suppose we have an employee table with thousands of record and each of which is 10 byte...

SQL Injection

SQL Injection The SQL Injection is a code penetration technique that might cause loss to our database. It is one of the most practiced web hacking techniques to place malicious code in SQL statements, via webpage input. SQL injection can be used to manipulate the application's web server by malicious users. SQL injection generally occurs when we ask a user to input their username/userID. Instead of a name or ID, the user gives us an SQL statement that we will unknowingly run on our database. For Example - we create a SELECT statement by adding a variable "demoUserID" to select a string. The variable will be fetched from user input (getRequestString). demoUserI = getrequestString("UserId"); demoSQL = "SELECT * FROM users WHERE UserId =" +demoUserId; Types of SQL injection attacks SQL injections can do more harm other than passing the login algorithms. Some of the SQL injection attacks include: Updating, deleting, and inserting the data: An attack can mo...

Computer Short Questions

Computer Short Questions & Answers: 1. What is any part of the computer that you can physically touch? – Hardware 2. Which generation of computers is still under development? – Fifth 3. What is the most common storage device for the personal computer? – Hard Disk Drive 4. Which key is used in combination with another key to perform a specific task? – Control 5. What is the pattern of printed lines on most products? – Barcodes 6. To make the number pad act as a directional arrow, we press which key? – Shift 7. Which devices let the computer communicate with you? – Input 8. What is the most frequently used piece of hardware for inputting data? – Hardware 9. What is the place where the computer stores programs and data? – Storage unit 10. What is the process of dividing the disk into tracks and sectors? – Formatting 11. What is the space in your computer that loads’ and works with data? – RAM memory 12. What is the storage which stores or retains data after power off? – Non-volatile s...