How to Optimize Database Queries for Performance?
Several tactics are used to optimize database queries:
Indexing: To expedite data retrieval, create indexes on columns that are commonly used in WHERE, JOIN, and ORDER BY clauses.
Staying away from Choose: To cut down on the quantity of data processed, only choose the columns you require.
Query Refactoring: To improve efficiency, rewrite complicated queries by leveraging joins effectively or dividing them into smaller subqueries.
Examining Execution Strategies: Utilize tools to identify bottlenecks and evaluate and comprehend the query execution plan.
Setting up a database: Make that the database has enough memory and CPU and is configured correctly.
Archiving Old Data: To keep tables tidy, periodically archive or remove outdated, unnecessary data.
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1.If we have a Salary coloumn in Staff entity with this description the salary must be monetary and >=$35450.00, how we can write it in into schemain SQL? 2. If we have Weight and Marks in Assessment entity and the Weight has the description of this it must be Non-zero percentage. And also the Marks attribute stores the maximum possible raw mark for assessment (e.g., 30), while Weight stores of the weight of this assessment for the paper as a whole (e.g., 10%). If Marks is not specified, then Weight is used for both. How we can convert this into schema in SQL????
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