SQL For Data Analysis > SQL INDEXES

SQL Index types

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SQL indexes are a way to improve the performance of a database by helping it find the data that it needs. They can be classified into different types based on their usage and their impact on the database. The most common types of SQL indexes are B-Tree indices, covering indexes, and hash indexes.

A B-Tree index is a data structure that organizes the data using a tree. The tree has a root node and branches that contain nodes. The index can be sorted or unsorted. The root node contains all of the records in the table while each branch contains pointers to other branches in order to find other records.

Clustered indexes are more efficient than non-clustered indexes because they can access the data in the index without scanning all of the data.

A primary index is an index that is created by a database administrator, usually when the database is first created. A secondary index is an index that has been created after the primary index.

Indexes are a way to organize data in order to make it more easily searchable. They can be used in SQL queries, but they are not the only way to search through data.

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Aman Kanaujia
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All good , but provide the data also for the assignment , Without data the interest is less day by day from the course. So, try to solve this problem as asap.

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Snehil
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Everything is good but keyboard sounds more harsh and overlap your voice whereas this course is best.

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FAROOK MOHAMMAD
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Hello sir, explaination is excellent. I have a request please send the db in excel or SQL file.

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Hari Prakash
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In SQL Join Function's 2nd video - Teacher's voice dose not match with background content that are plays

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Aakash Mavar
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Pravin Kashid
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  1. Getting Started
    18m 54s

  1. SQL Datatypes
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  2. SQL Commands
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  3. What is DBMS
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  4. What is RDBMS
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  1. Database Relationships
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  2. Primary Key
    6m 50s
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    4m 2s
  5. Difference between PK, UK and PK & FK
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  1. SQL Server Installation Step by Step
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  1. How to Create Database in SQL Server
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  2. Assignment : SQL Create Table
    5m 5s

  1. SQL Constraints
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  1. Filtering Data using Selection Command
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  7. SQL Functions for Data Analytics - 1
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  10. Row Number Function
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  12. How to use SQL Conditional Statements
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  13. How to use SQL Group by Clause
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  14. SQL Practical with Examples
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  15. Assignment : SQL Date and Time
    15m 16s

  1. Type of Joins in SQL - INNER, LEFT
    21m 24s
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  3. SQL Joins Practical Session 1
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  4. SQL Joins Practical Session 2
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  5. SQL Joins Practical Session 3
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  6. SQL Joins Practical Session 4
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  7. SQL Joins Practical Session 5
    29m 41s
  8. Assignment : SQL Joins
    15m 5s
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    13m 25s
  10. Assignment : SQL Functions 2
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  1. Practice: SQL Subqueries
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  2. Practice: SQL Subqueries & Unions
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  3. SQL Correlated Subqueries Part 1
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  5. SQL Correlated Subqueries Part 3
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  8. Correlated Select, Update & Delete Queries
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  10. SQL EXCEPT & INTERSECT
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  11. Assignment : SQL SubQueries
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  1. SQL Pivot, UnPivot Practical Example - 1
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  1. What are Views?
    22m 19s
  2. Examples of SQL Views Part -1
    16m 41s
  3. Examples of SQL Views Part -2
    17m 47s
  4. Assignment : SQL Views
    10m 17s

  1. What is SQL Index?
    13m 29s
  2. SQL Index types
    24m 50s

  1. Create Tables using Select Statement
    41m 2s
  2. Using Correlated Sub Query, Group By with Select Statement
    40m 2s
  3. Using Group By and Having Clauses with Select Statement
    23m 32s
  4. Using Index Optimizer with Select Statement
    23m 24s
  5. Using Union with Select Statement
    35m 4s
  6. Adding Multiple Records with Insert Statement
    22m 42s
  7. SQL Insert - Considerations and Best Practices
    9m 19s
  8. Insertion from Multiple Tables
    22m 11s
  9. SQL Delete - Types of Delete Operation Part -1
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  10. SQL Delete - Types of Delete Operation Part -2
    11m 38s
  11. Assignment : SQL Insert, Update & Delete
    7m 24s

  1. Loading & Connecting Different Files in SQL
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  1. Course Summary
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  1. Interview Questions Part 1
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