How does postgresql compare to "nosql"?

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How do I count rows in sql query?

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If we have n no of columns in a table, can we add new column in that table with not null constraint?

2 Answers  

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From an Employee table, how will you display the record which has a maximum salary?

29 Answers   Cap Gemini, Exilant, Synechron,

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SELECT flavor, SUM (ice_cream_sales) FROM sales_detail GROUP BY flavor ORDER BY 2 DESC If the "sales_detail" table contains ten records with different values in the flavor column (two "vanilla," three "chocolate," four "strawberry," and one NULL), how many rows are returned by the sample code above? 1. 0 rows 2. 1 row 3. 3 rows 4. 4 rows 5. 10 rows

8 Answers   Sonata,

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What does count (*) do in sql?

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Are subqueries faster than joins?

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What is trigger in pl sql with examples?

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What is sql select statement?

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What is the difference between left join and right join?

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In a distributed database system, can we execute two queries simultaneously?

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What is the Subquery?

4 Answers  

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