- Spring Data Mapping
- Spring Data JPA Annotations
@Entity anotation declares a class as an entity. @Table anotation defines the table, catalog, and schema name for your entity. @Id defines the unique identifier for your entity. @Column defines a column and its characteristics such as column name, column updatable or not, etc @GeneratedValue…
- Spring Data Configuration
1.Create a spring boot project. Spring Initializer For dependencies, select the following,a. JPAb. MySQL Driverc. Web Import your project to your favorite IDE. I am using Spring suite tool for this tutorial. 2. Add these configurations to your application.properties file. Note:…
- Introduction To Spring Data JPA
Hi and welcome to my Spring Data JPA tutorial. This tutorial is not for a beginner programmer. If you are new to programming and you want to learn about database checkout my SQL tutorial. If you are new to programming and you want to learn how code is connected and managing database data check out…
- Postgres – Joins
INNER, LEFT, RIGHT, FULL and CROSS, each with the row count it produces on real tables so the difference is visible rather than described. The LEFT JOIN whose WHERE clause silently turns it back into an INNER JOIN, anti-joins with NOT EXISTS, self-joins, and LATERAL — the one that lets you write top-N-per-group without a window function.