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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Archiving Old Data: To keep tables tidy, periodically archive or remove outdated, unnecessary data.
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IF Statements BLOCK 1 . IF a >= b THEN do_this …..; ELSE do_that….; END IF BLOCK 2 . IF a < b THEN do_that …..; ELSE do_this….; END IF; • Given any pair of non-NULL values for “a” and”b”, will Block 1 and Block 2 do the same thing? • What if either “a” or”b” (or both) is NULL?
