MCQs Test!! VB Basic Test !! Essentials of VB !! Creating User Services !! function !! Anatomy !! GK March-2019 !! DATA TYPES IN JAVA !! Classes ,Constructor ,Methods,Inheritance !! Ecology-I !! Biology 2019 !! Gk april 2019 !! Biology (living world) !! Plant anatomy !! CELL STRUCTURES AND FUNCTION !! General biology !! Human physiology !! Data structure !! Ecology-II !! GK TEST !! Reproduction in plants !! Human reproduction !! The ABC of C !! Operating system set1 !! Operating system set2 !! Gk and current affairs !! Animal kingdom !! Number system !! Animal kingdom-II !! Gk TEST-III !! Number series !! Microorganisms !! Interview question in c !! Time and Work !! Percentage !! General history !! Average !! Cells !! Locomotion and Movement !! paging !! Bacteriology !! Page replacement policy !! Secondary memory and Disk scheduling !! Introduction of Nervous System and neurons !! Plant harmones !! Transport and Mineral Nutrition in Plants !! Neurotransmitters !! Modern Indian History !! Photosynthesis in Plants !! Modern Indian History-II !! Plant respiration !! Environment & Biodiversity !! Environment & Biodiversity - II !! Algae, Bryophytes, Pteridophytes !! Area !! Cricket !! Days of the Year (India and the World) !! Plant Pathology - I !! Indian Transport System !! Plant Pathology - II !! Aptitude !! Biology !! Botany !! C language !! Computer Science !! Core Java !! Gate !! GK !! Mysql !! Operating system !! Physics !! VB-Visual Basic !! Zoology

Hibernate

Using Relation Table
Previous Home Next

In this approach the relation table is used to manage the relation between obect. Primary key of both objects are used as foreign key in relation table .

Advantages:-

  • support one-to-many ,if any time one name has many address then it support it.

Disadvantage:-

  • Performance is degraded.

Example:-

In this approach three tables are used

  • Table for Batch(id,name)
  • Table for Trainer(id,name,fees)
  • Table for Relation(batchid,trainerid)

abc.xml

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-mapping>
<class name="r4r.Address">
<id name="id" type="int">
<generator class="increment"></generator>
</id>
<property name="city"></property>
<property name="street"></property>
</class>
<class name="r4r.Person" table="person3">
<id name="id" type="int">
<generator class="increment">
</generator>
</id>
<property name="name"></property>
<join table="addresses">
<key column="personid">
<many-to-one name="address" class="r4r.Address" 
cascade="all" column="addressid" unique="true">
</many-to-one>
</join>
</class>
</hibernate-mapping>
Previous Home Next