# SQL Tutorial

## SQL Tutorials by Prepinsta: Learn SQL from the Basics to Advanced Topics for All Skill Levels

Our curated SQL tutorials are designed to cater to non CS-IT students, beginners, and experienced coders alike. Whether you’re new to coding or looking to add SQL as a valuable skill, our course covers everything from the fundamentals to advanced concepts. Start from scratch and gain the knowledge needed for effective data preparation and management.

## SQL Tutorial

Time complexity in Data Structures and Algorithms (DSA) In Python refers to the measure of how the running time of an algorithm grows as the input size increases.

• Introduction to SQL
• SQL Syntax

## SQL Database

Recursion in Data Structures and Algorithms (DSA) with Python is a programming technique where a function calls itself to solve a problem.

• In Python, it’s essential to have a base case to prevent infinite recursion. Recursion is commonly used in solving problems like factorials, Fibonacci sequences, and tree traversals.

## SQL SELECT (I)

Searching and sorting are fundamental operations in Data Structures and Algorithms (DSA) with Python. Searching involves finding a specific element within a collection of data, using techniques like linear or binary search.

• Sorting arranges data in a specific order, such as ascending or descending, using algorithms like quicksort or mergesort. Efficient searching and sorting are crucial for optimizing data retrieval and organization in various applications.
• SQL SELECT and SELECT WHERE
• SQL AND, OR and NOT
• SQL SELECT DISTINCT
• SQL SELECT AS
• SQL LIMIT, TOP and FETCH FIRST
• SQL IN And NOT IN Operator
• SQL BETWEEN Operator
• SQL IS NULL and NOT NULL
• SQL MIN() and MAX()
• SQL COUNT()
• SQL SUM() and AVG()

## SQL SELECT (II)

In DSA with Python, a stack is a linear data structure that follows the Last-In-First-Out (LIFO) principle.

• It’s like a stack of plates—items are added and removed from the top. Stacks are used for managing function calls, tracking history, and more.
• SQL ORDER BY
• SQL GROUP BY
• SQL LIKE
• SQL Wildcards
• SQL UNION
• SQL Subquery
• SQL ANY and ALL
• SQL CASE
• SQL HAVING
• SQL EXISTS

## SQL JOIN

In DSA with Python, a queue is a linear data structure following the First-In-First-Out (FIFO) principle.

• Elements are added at the rear and removed from the front. Queues are used for tasks like scheduling and managing data waiting to be processed.
• SQL JOIN
• SQL INNER JOIN
• SQL LEFT JOIN
• SQL RIGHT JOIN
• SQL FULL OUTER JOIN

## SQL Insert, Update and Delete

In Python, you can implement a linked list data structure using classes.

• A linked list consists of nodes, where each node has two parts: data and a reference to the next node in the list.
• SQL Insert Into
• SQL Update
• SQL Select Into
• SQL Insert Into Select
• SQL Delete and Truncate Rows

## SQL Constraints

Trees are hierarchical data structures that consist of nodes connected by edges. They are used to represent hierarchical relationships, such as organizational structures, file systems, and more.

• One of the most common types of trees is the binary tree, but there are various other types like binary search trees, AVL trees, B-trees, and more.
• SQL Constraints
• SQL Not Null Constraint
• SQL Unique Constraints
• SQL Primary Key
• SQL Foreign Key
• SQL Check
• SQL Default
• SQL Create Index

## SQL Database & Table

A Binary Search Tree (BST) is a widely used data structure in computer science and programming. It is a type of binary tree with a specific property that makes it particularly useful for searching, sorting, and efficient data retrieval.

• A BST is organized in a hierarchical manner, and each node in the tree has a value, a left subtree, and a right subtree.
• SQL Create Table
• SQL Drop Database
• SQL Drop Table
• SQL Alter Table
• SQL Backup Database