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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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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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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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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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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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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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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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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Spring JPA LIKE Query Example With JdbcTemplate or JpaRepository

LIKE queries in SQL allow users to search for specified patterns in the database table columns, enabling flexible and dynamic…

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