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Subqueries are embedded SELECT queries within another SELECT, INSERT, UPDATE, or DELETE statement. They are particularly useful for filtering or aggregating data dynamically based on specific criteria from another table or set of data. For instance, a subquery can be used to calculate an average salary for employees within a particular department and then use this value to filter or modify records within the main query. This is essential for complex reporting scenarios where nested logic is required, such as calculating sums, averages, or applying complex conditions across related data sets. Why Other Options Are Incorrect: • A) Update Data: While subqueries can influence the data manipulation in the main query, updating data within a subquery typically involves more complex statements and is not the primary use of subqueries. • B) Standalone Query: Subqueries do interact with the main query and are not completely independent in terms of execution context. • D) Single Value: Subqueries can return multiple values, depending on their structure and what they are designed to query. • E) Unsupported: Subqueries are indeed supported in SQL and are a fundamental part of SQL querying.
A person earn 18% profit on the marked price. If he quadruple the marked price but gave 40% discount on the new marked price then how much percentage of...
A shopkeeper sells an article for Rs 120 and earns thrice the profit that he would have earned on selling this article for Rs 66. Find the C.P of this a...
A shopkeeper sells an item for ₹7200 and gains 20% on the cost price. If he sells the same item at ₹8000, what will be his percentage gain?
A dishonest seller, at the time of selling and purchasing uses weight 22% less and 30% more per kg respectively. Find the approx. percent profit earned ...
A shopkeeper marked an article 60% above the cost price and sold it after giving a discount of 20%. Had he sold the article witho...
A shopkeeper marked his goods 32% above the cost price and earned a profit of Rs. 35 after selling it by giving a discount of 20%. Find the cost price o...
'A' purchased an article and sold it to 'B' at 10% profit. 'B' marked it up by 18% above the price at which 'A' has purchased it and then sold it after ...
A shopkeeper marked an article P% above its cost price and sold it for Rs. 1600 after giving a discount of 20%. If the shopkeeper had a loss of 8% on th...
A shopkeeper made a profit of 30% by selling an article for Rs. 260. If he had sold it after allowing a discount of 15% on its selling price, then find ...
The profit earned by selling an article for Rs. 9,200 is 3/4th the loss incurred on selling the same article for Rs. 6,000. Find the selling price of th...