Promotion
CodeGym University
Learning
Course
Tasks
Surveys & Quizzes
Games
Help
Schedule
Community
Users
Forum
Chat
Articles
Success stories
Activity
Reviews
Subscriptions
Light theme
Lessons
Reviews
About us
Start
Start learning
Start learning now
Quest map
Lessons
All quests
All levels
Object Mapping
Module 4. Working with databases
Level 12,
Lesson 5
We store files on the server We store pictures directly in the XML and JSON database
Using different data type converters
Module 4. Working with databases
Level 12,
Lesson 6
Creating Your Own Type Converter Creating Your Own Data Type Registering Your Own Type
Collection Mapping
Module 4. Working with databases
Level 13,
Lesson 0
Collection list. Auxiliary table. Set collection. List collection. Map collection.
@ManyToOne
Module 4. Working with databases
Level 13,
Lesson 1
Table Level Relationship Java Class Level Relationship @ManyToOne Annotation Query Examples
@OneToMany
Module 4. Working with databases
Level 13,
Lesson 2
Relationship at the table level. Communication at the level of Java classes. The @OneToMany annotation. Request examples.
@ManyToMany
Module 4. Working with databases
Level 13,
Lesson 3
Service table. Relationship at the table level. Communication at the level of Java classes. @ManyToMany annotation. Request examples.
@OneToOne
Module 4. Working with databases
Level 13,
Lesson 4
Various forms of one-to-one communication @Embedded One-way OneToOne Two-way OneToOne
Cascading changes
Module 4. Working with databases
Level 13,
Lesson 5
Deep dependency management CascadeType ALL, PERSIST, MERGE REMOVE, DELETE, DETACH Orphan removal parameter fetch parameter
Lazy Loading
Module 4. Working with databases
Level 14,
Lesson 0
Background of the problem Making things worse with collections Light at the end of the tunnel
Lazy Loading when mapping collections
Module 4. Working with databases
Level 14,
Lesson 1
fetch parameter Default value @LazyCollection annotation
LazyCollectionOption.EXTRA
Module 4. Working with databases
Level 14,
Lesson 2
Getting to know LazyCollectionOption.EXTRA. The strongest advantage of LazyCollectionOption.EXTRA. N+1 problem.
JOIN FETCH
Module 4. Working with databases
Level 14,
Lesson 3
Description of the problem. JOIN FETCH restrictions.
Show more
1
...
46
47
48
49
50
...
66
Please enable JavaScript to continue using this application.