Training Course in Structured Query Language (SQL)

Introduction to SQL

• What is SQL and its Importance
  • Introduction to SQL and its uses in database management.
  • Difference between SQL and other programming languages.
  • The importance of SQL in data analysis and software development.
• Types of Database Management Systems (DBMS)
  • Familiarity with popular DBMS like MySQL, PostgreSQL, Oracle.
  • Understanding how to choose a DBMS based on project requirements.
  • Comparing DBMS systems in terms of performance and features.
• Database Components
  • Introduction to tables, rows, and columns.
  • Understanding basic database concepts such as relationships between tables.
  • Explanation of different data types (e.g., text, numbers, dates).

Creating Databases and Tables

• Creating a Database using SQL
  • How to use the CREATE DATABASE command.
  • Basic rules for naming databases.
  • Ensuring the successful creation of a database.
• Creating Tables and Defining Data Types
  • Using the CREATE TABLE command to create tables.
  • Defining appropriate data types for each column.
  • Using basic constraints like NOT NULL, UNIQUE.
• Adding Basic Constraints
  • Defining primary keys and using them.
  • Setting up foreign keys to link tables.
  • Adding indexes to improve query performance.

Querying Data (SELECT)

• SELECT Query to Retrieve Data
  • How to write a SELECT query to retrieve data from a table.
  • Specifying columns to retrieve.
  • Using DISTINCT for unique filtering.
• Filtering Data Using WHERE
  • Using the WHERE clause to filter data.
  • Learning comparison operators like =, >, <, BETWEEN.
  • Using logical operators like AND, OR, NOT.
• Sorting Data Using ORDER BY
  • Using the ORDER BY command to sort results.
  • Choosing between ascending (ASC) or descending (DESC) order.
  • Using multi-column sorting to refine query results.

Data Manipulation (INSERT, UPDATE, DELETE)

• Inserting Data with INSERT
  • How to insert new data into tables using INSERT INTO.
  • Adding multiple rows in a single query.
  • Ensuring successful data insertion.
• Updating Data with UPDATE
  • How to use UPDATE to modify existing data.
  • Applying the WHERE clause to target specific records.
  • Avoiding random data modifications.
• Deleting Data with DELETE
  • Using DELETE to remove data from tables.
  • The difference between DELETE and TRUNCATE.
  • The importance of using WHERE to specify target records.

Joining Tables (JOIN)

• INNER JOIN
  • Using INNER JOIN to combine multiple tables.
  • Retrieving data that is common between tables.
  • Understanding the impact of INNER JOIN on retrieved data.
• LEFT JOIN
  • Using LEFT JOIN to retrieve all records from the first table.
  • Retrieving missing records from the second table.
  • Comparing LEFT JOIN with RIGHT JOIN.
• RIGHT JOIN
  • Understanding how to use RIGHT JOIN.
  • Retrieving all records from the second table.
  • The difference between LEFT JOIN and RIGHT JOIN in data retrieval.

Mathematical Operations and Functions in SQL

• Mathematical Functions in SQL
  • Using arithmetic operators like +, -, *, / in queries.
  • Performing mathematical operations on columns.
  • Handling missing values (NULL).
• Aggregate Functions
  • Using functions like COUNT(), SUM(), AVG().
  • Applying GROUP BY to group data by a column.
  • Using HAVING to filter results after grouping.
• String and Date Functions
  • Working with strings using functions like CONCAT(), LENGTH(), SUBSTRING().
  • Using date functions like NOW(), DATE(), YEAR().
  • Formatting text and date data to meet specific requirements.

Advanced Filters and Grouping

• Using GROUP BY for Data Grouping
  • How to group data using GROUP BY.
  • Applying GROUP BY to multiple columns.
  • Understanding the difference between GROUP BY and ORDER BY.
• Filtering Groups Using HAVING
  • Using HAVING to filter data after grouping.
  • Comparing HAVING with WHERE in SQL queries.
  • Applying complex conditions with HAVING.
• Subqueries
  • Introduction to subqueries and how to use them.
  • A subquery inside the main query.
  • Using IN, EXISTS with subqueries.

Keys and References Between Tables

• Primary Keys
  • Understanding primary keys and their role in ensuring record uniqueness.
  • How to define a primary key when creating a table.
  • Ensuring that the primary key is unique and non-repetitive.
• Foreign Keys
  • Defining foreign keys and their role in linking tables.
  • How to add a foreign key to a table.
  • Ensuring data integrity using foreign keys.
• Constraints for Data Integrity
  • Using constraints like UNIQUE, CHECK, DEFAULT.
  • The importance of maintaining data integrity through constraints.
  • Applying constraints to ensure valid data entry.