Matakuliah
Tahun
Versi
: M0174/OBJECT ORIENTED DATABASE
: 2005
: 1/0
Pertemuan 11
The Manipulative part of the object
data model (Lanjutan bagian 2)
1
Learning Outcomes
Pada akhir pertemuan ini, diharapkan mahasiswa
akan mampu :
• Mahasiswa dapat Menjelaskan proses
manipulasi object data model dan
operator-operator yang digunakan dalam
manipulasi tersebut (C2)
2
Outline Materi
• Union
• Intersect
• Difference
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Union
• Union
– Is a binary operator (it takes two objects as
operands).
– Union of two set object is a set object which
contains all off the objects contained in one or
both of the two operand set objects.
4
Union
• Example
Retail_Customer Union [Customer]
Trade_Customer
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Union
1
2
3
4
5
6
1
2
3
4
5
6
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Intersect
• Intersect
– Intersect like union operators upon two set
objects.
– The intersection of two set objects contains
object which occur in both of them.
• Example
Retail_Customer Intersect [Customer]
Trade_Customer
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Intersect
1
2
3
2
3
4
2
3
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Difference
• Difference (minus)
– This operator like intersect and union,
operators upon two set objects.
– Difference define a set object which contains
objects which occur in the first of the operand
set objects, but not in the second
• Example
Retail_Customer Minus [Customer]
Trade_Customer
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Difference
1
2
3
4
5
1
5
6
R
T
2
3
4
R Minus T
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SUMMARY
• Examples of the pick and mix operator are
– Union
– Intersect
– Difference
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