Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Transaction Processing
Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individua…
Question

 Using a specific example (different from what the textbook discusses), explain the use of binary and shared/exclusive locks in a DBMS (in your own words).

ACTION ITEMS Suppose you are a manufacturer of product ABCD, which is composed of parts AAAA, BBBB, CCCC and DDDD. Each time a new product is created, it must be added to the product inventory, using the PROD_QOH in a table named PRODUCT. And each time the product ABCD is created, the parts inventory, using PART_QOH in a table named PART, must be reduced by one each for parts AAAA, BBBB, CCCC and DDDD. The sample database contents are shown below for these items: Tablename: PRODUCT Tablename: PART PROD_QOH 1,214 PROD_CODE PART_CODE PART_QOH АВCD AAAA 547 BBBB 108 CCCC 249 DDDD 89
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Transcribed Image Text:ACTION ITEMS Suppose you are a manufacturer of product ABCD, which is composed of parts AAAA, BBBB, CCCC and DDDD. Each time a new product is created, it must be added to the product inventory, using the PROD_QOH in a table named PRODUCT. And each time the product ABCD is created, the parts inventory, using PART_QOH in a table named PART, must be reduced by one each for parts AAAA, BBBB, CCCC and DDDD. The sample database contents are shown below for these items: Tablename: PRODUCT Tablename: PART PROD_QOH 1,214 PROD_CODE PART_CODE PART_QOH АВCD AAAA 547 BBBB 108 CCCC 249 DDDD 89
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Step 1:-Lock
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Step 2
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Step 3
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Step 4:2. Exclusive locks:
VIEW
Step 5:-3. Shared lock:
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