Aggregate Functions in SQL-
Aggregate functions in SQL perform calculations on a set of values and return a single value. They are commonly used with the GROUP BY clause to perform operations on grouped data.

There are 5 Aggregate Functions in SQL- MIN…

JDBC- Java Database Connectivity

CRUD:
C- Create
R- Read
U- Update
D- Delete

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Functionality-
1. Create Database
2. Craete Table
3. Insert Data
4. Read Data
5. Update Data
6. Delete By Id
7. Delete All…

Hibernate Many-to-One mapping
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "address_id") // Foreign key column
private Address address;

cascade = CascadeType.ALL in @ManyToOne ensures that the Address will be saved/updated when saving Employee.…

J2EE- Servlet Hello World
A Servlet is a Java program(Web Application) that runs on a web server and handles HTTP requests and responses. It is a key component of Java EE used to create dynamic web applications.

Servlet Lifecycle

Initialization (init()):…

SQL- Structured Query Language
RDBMS stands for Relational Database Management System.

Modern database systems such as MySQL, PostgreSQL, SQL Server, Oracle, etc.
The data in RDBMS is stored in database objects called tables. A table is a collection of related…

Hibernate Named Queries-
Named Queries in Hibernate are predefined, reusable queries written in HQL

Advantages of Named Queries
Precompiled – Compiled once during application startup.
Reusable – Defined once and used many times.
Maintainable – Easy to manage…

Hibernate Many-to-Many mapping
Employee[*]- Address[*]

GitHub- https://github.com/fullstackjavadeveloperpune/hibernatemanytomanymapping

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Hibernate Full Stack User SignUp Application
Back End- Java, JDK 17, Hibernate, Servlet
Front End- JSP
Database- MySQL
Web Server- Tomcat 11

Functionality- User SignUp

GitHub- https://github.com/fullstackjavadeveloperpune/hibernatefullstackusersignup

💻…

J2EE- Servlet Hello World
A Servlet is a Java program(Web Application) that runs on a web server and handles HTTP requests and responses. It is a key component of Java EE used to create dynamic web applications.

Servlet Lifecycle

Initialization (init()):…

SQL- Structured Query Language
RDBMS stands for Relational Database Management System.

Modern database systems such as MySQL, PostgreSQL, SQL Server, Oracle, etc.
The data in RDBMS is stored in database objects called tables. A table is a collection of related…

J2EE- Servlet | JSP | JDBC
User Registration- Full Stack Application
MVC Architecture
M- Model[DAO]
V- View[Presentation]
C- Controller[Business]

Back End- Java | JDK 17 | Servlet | JDBC
Front End- JSP
Database- MySQL

GitHub URL- https://github.com/ful…

Hibernate Full Stack User SignUp | SignIn Application

Back End- Java, JDK 17, Hibernate, Servlet
Front End- JSP
Database- MySQL
Web Server- Tomcat 11

Functionality- User SignUp | SignIn

GitHub- https://github.com/fullstackjavadeveloperpune/hibernatef…

Joins in SQL-
Joins in SQL are used to retrieve data from multiple tables based on a related column between them.

1. INNER JOIN
Returns only the matching rows from both tables.
If there is no match, the rows are excluded.

2. LEFT OUTER JOIN (LEFT JOIN)…

Joins in SQL-
Joins in SQL are used to retrieve data from multiple tables based on a related column between them.

1. INNER JOIN
Returns only the matching rows from both tables.
If there is no match, the rows are excluded.

2. LEFT OUTER JOIN (LEFT JOIN)…

JDBC- Java Database Connectivity

Steps for JDBC
1. Load Driver Class
2. Establish Database Connection
3. Create Statement
4. Execute Query
5. Close Database Connection

#GitHub URL- https://github.com/fullstackjavadeveloperpune/jdbcex

💻 Stay ahead in 2025…

Hibernate Full Stack User SignUp | SignIn Application

Back End- Java, JDK 17, Hibernate, Servlet
Front End- JSP
Database- MySQL
Web Server- Tomcat 11

Functionality- User SignUp | SignIn

GitHub- https://github.com/fullstackjavadeveloperpune/hibernatef…

Keys in SQL: Primary Key, Unique Key, and Foreign Key
1. Primary Key -
Primary Key is a column in a table that uniquely identifies each row in that table.

Characteristics:
Ensures uniqueness – No two rows can have the same value in the primary key column.…

J2EE- HRM Full Stack Application

MVC Architecture
M- Model[DAO]
V- View[Presentation]
C- Controller[Business]

Back End- Java | JDK 17 | Servlet | JDBC
Front End- JSP
Database- MySQL

Functionality-
1. SignUp
2. SignIn
3. FindById
4. FindAll
5. Update Data…

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Credits :
Chief guest : Kiran Jadhav
DOP and Post Production : Shreya Morankar
Anchor : Harshal Morankar

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