PostgreSQL
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Core Java
Resolving PostgreSQL JSON Type Mismatch Errors in JPA
When working with PostgreSQL and Java Persistence API (JPA), you might encounter a common error related to JSON data types.…
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Enterprise Java
How to Fix PSQLException Operator Does Not Exist Character Varying = UUID
When working with Spring JPA and PostgreSQL, you might encounter an error like PSQLException: Operator Does Not Exist: character varying…
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Core Java
Store File or byte[] as SQL Blob in Java (Store and Load)
In many applications, you might need to store files or binary data directly in a database. PostgreSQL offers a data…
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Core Java
Insert JSON Object to PostgreSQL using preparedStatement
Storing JSON data in a PostgreSQL database can be quite efficient and effective. PostgreSQL offers two data types to store…
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Enterprise Java
Finding the Max Value in Spring Data JPA
When working with Spring Data JPA, retrieving specific values from a database is a common requirement. One such requirement is…
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Enterprise Java
Integrating Java Enums with JPA and PostgreSQL Enums
Enums are a powerful feature in Java, allowing us to define a fixed set of constants. When using JPA (Java…
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Enterprise Java
Embed PostgreSQL in Spring Boot Testing
Testing is a crucial aspect of software development, ensuring that code functions as expected and integrates well with other components.…
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Enterprise Java
Using Enum in Spring Data JPA Queries
When constructing our persistence layer using Spring Data JPA, we frequently deal with entities that contain enum fields. These enum…
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Enterprise Java
Spring Boot MVC REST Controller Example & Unit Tests
In modern web development, REST APIs are essential for enabling communication between different systems and platforms. The Spring Framework, particularly…
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