Intro to SQL: Querying and managing data | Khan Academy
Learn how to use SQL to store, query, and manipulate data. SQL is a special-purpose programming language designed for managing data in a relational database, and is used by a …
SQL basics - Khan Academy
SQL, or Structured Query Language, is a language specifically designed for accessing and interacting with databases. It allows users to create tables, modify data, and retrieve …
Computer Programming - Khan Academy
In this course, you'll explore the wonders of what you can create with programming. Learn how to program drawings, animations, and games using JavaScript and the Processing library, and …
New SQL script | Khan Academy
Our implementation of SQL is based on a popular dialect of SQL known as SQLite. To run SQL in the browser, we make use of these technologies: asm.js; Emscripten; sql.js
SQL basics - Khan Academy
Computer programming - JavaScript and the web. Course: Computer programming - JavaScript and the web > Unit 3. Lesson 1: SQL basics. Welcome to SQL. Creating a table and inserting …
Computer programming - Khan Academy
In this course, you'll explore the wonders of what you can create with programming. Learn how to program drawings, animations, and games using JavaScript and the Processing library, and …
SQL basics - Khan Academy
What is taught in this course (SELECT FROM, INSERT INTO, WHERE, ORDER BY, SUM) is exactly the same in all: SQLite, Oracle SQL, MySQL, MS SQL, differences come later in more …
More efficient SQL with query planning and optimization
SQL is a declarative language - each query declares what we want the SQL engine to do, but it doesn't say how. As it turns out, the how -- the "plan" -- is what affects the efficiency of the …
SQL Documentation | Khan Academy
Database wizardry starts here: dive into SQL Documentation and learn how to query, manage, and organize data like a pro.
SQL basics - Khan Academy
Well to do that in SQL we can use what's called an aggregate function. An aggregate function is useful for things like getting the maximum, minimum, sum and average of values in our …