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What is transaction?
Collections of operations that form a single logical unit of work are known as transactions.
What are shortcomings in structured approach? Structured methodology treats data and their behaviours separately, and this makes it harder to isolate changes. If changes are re
prototype of a distributed information system for a national car part retail outlet chain.
Hardware failure : Hardware failures are the failures when some disk or hardware chip fails. This may result in loss of data. One such trouble can be that a disk gets damaged and
A database administrator''s responsibilities and data contents
Recovery Techniques: After Reading the types of failures and database errors, let us talk about how to recover from the failures. Recovery can be complete using/restoring the previ
Define physical image of a global relation at a site
Construct a clean ans concise ER diagram for the database indicating the cardinality mapping for Employee management syatem
Whst is logical schema ? Logical schema is the entire database.
How are tables stored on Disk? We realise that every record of a table can have different amounts of data. This is due to in some records; some attribute values may be "zero".
Explain Hierarchical Model ? Hierarchical Model - It was established to model several kinds of hierarchical organizations which exist in the real world. It uses tree structur
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