1 Session 3 Welcome: To session 3-the 8 th. learning sequence “Relational algebra “ Recap : In...

Session 3

Welcome: To session 3-the 8th. learning sequence “Relational algebra “Recap : In the previous learning sequence, we

discussed some example queries.Present learning: We shall explore the following

topic: - Another example Queries.xample Queries.

Relational Algebra

Relational AlgebraRelational Algebra

A basic expression in the relational algebra consists of either one of the following: A relation in the database A constant relation

Relational Instances for the Relational Instances for the Purchasing SystemPurchasing System

The Supplier relation:

S-number S-name S-city

S100 Ahmed Amman

S200 Ali Jarash

S300 Kasim Irbid

S400 Jasim Aquaba

S500 Rana Amman

The Part relation:

P-number

P-name

Color Price P-city

P1 TV Silver 300 Amman

P2 Camera Black 100 Jarash

P3 Video Black 200 Amman

P4 PC Silver 400 Irbid

P5 Printer Red 100 Irbid

P6 Scanner silver 150 Jarash

The shipment relation:

S-number

P-number

Quantity

S100 P1 100

S100 P2 150

S100 P3 200

S100 P4 160

S100 P5 50

S100 P6 70

S200 P1 200

S200 P2 150

S300 P2 400

S400 P2 150

S400 P4 80

S500 P4 100

Example QueriesExample Queries Q1- Get supplier names for suppliers who supplying at least one silver part.

Temp1 P-color = ‘silver’ (Part)

P-number

P-name

Color Price P-city

P1 TV Silver 300 Amman

P6 Scanner

silver 150 Jarash

Temp1 P-color = ‘silver’ (Part)Temp2 Shipment Temp1

S-number P-number

Quantity

P-name Color Price P-city

S100 P1 100 TV Silver 300 Amman

S100 P4 160 PC Silver 400 Irbid

S100 P6 70 Scanner silver 150 Jarash

S200 P1 200 TV Silver 300 Amman

Temp1 P-color = ‘silver’ (Part)Temp2 Shipment Temp1Temp3 S-number (Temp2)

S-number

Temp4 Supplier Temp3

S100 Ahmed Amman

S200 Ali Jarash

S400 Jasim Aquaba

S500 Rana Amman

Result S-name (Temp4)S-name

Result

Example QueriesExample Queries Q2- Get supplier names and cities who supplying parts stored in Irbid.

Temp1 P-city = ‘Irbid’ (Part)

Example QueriesExample Queries Q2- Get supplier names and cities who supplying parts stored in Irbid.

Temp1 P-city = ‘Irbid’ (Part)

P-number

P-name Color Price P-city

P5 Printer Red 100 Irbid

Example QueriesExample Queries Q2- Get supplier names and cities who

supplying parts stored in Irbid.

Temp1 P-city = ‘Irbid’ (Part)Temp2 Shipment Temp1

S-number

P-number Quantity

P-name Color

Price P-city

S100 P5 50 Printer Red 100 Irbid

Temp1 P-city = ‘Irbid’ (Part)Temp2 Shipment Temp1Temp3 S-number (Temp2)

S-number

S100 Ahmed Amman

S400 Jasim Aquaba

S500 Rana Amman

Result S-name , S-city (Temp4)

S-name S-city

Ahmed Amman

Jasim Aquaba

Rana Amman

Result

Example QueriesExample Queries Q3- Find supplier names for suppliers who supply all parts.

Temp1 P-number (Part)

P-number

Temp2 S-number , P-number (Shipment)

S-number

P-number

S100 P1

S100 P2

S100 P3

S100 P4

S100 P5

S100 P6

S200 P1

S200 P2

S300 P2

S400 P2

S400 P4

S500 P4

Temp1 P-number (Part)Temp2 S-number , P-number (Shipment)

Temp3 Temp2 Temp1

S-number

S100Temp3

Temp3 Temp2 Temp1 Temp4 Supplier Temp3

S-number

S-name S-city

S100 Ahmed Amman

Result S-name (Temp4)

S-name

AhmedResult

Example QueriesExample Queries Q4- How many parts they have?

g count (P-number) (Part)

P-number

Example QueriesExample Queries Q5- Find the total quantities supplied by each supplier.

S-number g sum (Quantity) (Shipment)

S-number Quantity

S100 730

S200 350

S300 400

S400 250

S500 100

S-number g sum (Quantity) as ( sum-quantity) (Shipment)

S-number Sum-Quantity

S100 730

S200 350

S300 400

S400 250

S500 100

Relational AlgebraRelational Algebra

Summary: In this learning sequence, we discussed

another example queries about purchasing system.

1 Session 3 Welcome: To session 3-the 8 th. learning sequence “Relational algebra “ Recap : In...

Documents

Character Creative arts Early Stage 1 learning sequence · Web viewThe character of the arts Creative arts learning sequence Early Stage 1 Learning sequence description In Lesson

Creative arts Stage 2 learning sequence – How does … · Web viewCreative arts Stage 2 learning sequence – How does character inform the arts? Learning sequence description This

Deanship of Distance Learning Avicenna Center for E-Learning 1 Session - 7 Sequence - 1 Normalization…

Sequence to sequence (encoder-decoder) learning

Sequence-to-Sequence Learning Problem VINet: Visual ...cseweb.ucsd.edu/classes/sp17/cse252C-a/CSE252C_20170517.pdf · VINet: Visual-Inertial Odometry as a Sequence-to-Sequence Learning

English S1 learning sequence - character€¦ · Web view2020-05-25 · English ES1 learning sequence – Connotation, imagery and symbol. Learning sequence description. Connotation,

Learning sequence thinking mathematically 3 Stage 2€¦ · Web view2020-05-25 · Learning sequence thinking mathematically 3 Stage 2. Learning sequence description. This sequence

Thinking mathematically 3 learning sequence Stage 2 · Web viewLearning sequence thinking mathematically 3 Stage 2 Learning sequence description This sequence of lessons provides

Decrease in gamma-band activity tracks sequence learning · Madhavan et al. Gamma-band activity tracks sequence learning FIGURE 1 | Sequence encoding tasks and learning behavior

Sequence to Sequence Learning: Fast Training and Inference ...michaelauli.github.io/talks/convs2s.pdfFigure from: Sutskever et al., 2014, "Sequence to Sequence Learning with Neural

Convolutional Sequence to Sequence Learning Sequence to Sequence Learning Jonas Gehring Michael Auli David Grangier Denis Yarats Yann N. Dauphin Facebook AI Research Abstract The prevalent

IMPLICIT STRUCTURED SEQUENCE LEARNING

Transformers and sequence- to-sequence learning

English S1 learning sequence - character · Web view2020-05-11 · English S1 learning sequence – Character. Learning sequence description. Character is an important concept in

Deep Learning Sequence to Sequence models: Attention Modelsbhiksha/courses/deeplearning/... · Deep Learning Sequence to Sequence models: Attention Models 17 March 2018 1. ... ENCODER

LEARNING SCOPE & SEQUENCE - PVNCCDSB

Sequence to Sequence Learning - cs224d.stanford.educs224d.stanford.edu/lectures/CS224d-Lecture16.pdf · joint work with many Google Brain collaborators Sequence to Sequence Learning

Mathematics Stage 1 learning sequence b€¦ · Web viewMathematics Stage 1 learning sequence b Learning sequence description This sequence of lessons provides opportunities to deepen

Character learning sequence English ES1 · Web viewEnglish Early Stage 1 learning sequence – focus on character Learning sequence description

English S2 learning sequence - character€¦ · Web view2020. 5. 11. · English Stage 2 learning sequence – Character. Learning sequence description. Character is an important