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What is transaction?
Collections of operations that form a single logical unit of work are known as transactions.
Guidelines for creation of table: Table name should begin with an alphabet. In table name, single quotes and blank spaces are not allowed. Reserve words of that DBM
What should be declared explicitly in the corresponding ABAP/4 Statements to access internal tables without header lines & why? Work Area. This is needed as the Work Area is
For problems 1-4, give all candidate keys for the tables with FDs specified. Composite candidate keys must be put in parentheses, and candidate keys must be separated with commas
find the name of supplier who supply some red part
How to create values of structured type? Constructor functions are used to make values of structured types. A function with the similar name as a structured type is a construct
Serialisable Schedules: If the processes of two transactions conflict with each other, how to verify that no concurrency related problems have happened? For this, serialisability t
Define the Two Phase Locking Protocol This is a protocol that is used to make sure serializability of transactions. This protocol needs that every transaction issue lock and u
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an ex
What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
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