Update README.md

Author: AnghelLeonard

README.md

@@ -3236,7 +3236,9 @@ This kind of checks or constraints are easy to implement via database triggers.
 
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-229. **Description:** This application is an example of using Spring Data Query By Example (QBE) to check if a transient entity exists in the database. Consider the `Book` entity and a Spring controller that exposes an endpoint as: `public String checkBook(@Validated @ModelAttribute Book book, ...)`. Beside writting an explicit JPQL, we can rely on Spring Data Query Builder mechanism or, even better, on Query By Example (QBE) API. This API is quite useful if the entity has a significant number of attributes and:
+229. **[How To Check If A Transient Entity Exists In The Database Via Spring Query By Example (QBE)](https://github.com/AnghelLeonard/Hibernate-SpringBoot/tree/master/HibernateSpringBootExampleApi)**
+
+**Description:** This application is an example of using Spring Data Query By Example (QBE) to check if a transient entity exists in the database. Consider the `Book` entity and a Spring controller that exposes an endpoint as: `public String checkBook(@Validated @ModelAttribute Book book, ...)`. Beside writting an explicit JPQL, we can rely on Spring Data Query Builder mechanism or, even better, on Query By Example (QBE) API. This API is quite useful if the entity has a significant number of attributes and:
 
 - for all attributes, we need a head-to-head comparison of each attribute value to the corresponding column value
 - for a subset of attributes, we need a head-to-head comparison of each attribute value to the corresponding column value