database questions.docx - Answer 1 Nesting of queries has...

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Answer 1: Nesting of queries has both positive and negative effects on database. When it comes to integrity, nested queries are required to be executed with great care as a single query will lead to multiple transactions, a single bug in query (wrong field name, data type etc) may lead to ambiguous records which will have a negative effect on integrity. For a successful transaction using nested queries, a developer must follow a strong mechanism. The nested query must be chosen only for required fields as the size of tables updated by nested query is inversely proportional to execution speed. The database must be optimized after executing a nested query for preventing any integrity issues. Also it is must to apply proper integrity constraints before executing these queries. Answer 2: There can be possibility of having two identical records in two different tables in a database without having any negative effect on database integrity. As two different tables will have integrity constraints employed differently which will not affect integrity. But when it come to
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