Complex SQL Queries

Welcome to your SQL Practice Quiz

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What is fast way to calculate fifth highest salary?
What is Query to write the following string in vertical manner in SQL? "AMIET"
How to create a table which has same structure of the table with data and without data??
Write the query which will gives us the records of the Employee and its manager?
What is Fastest Way to execute the query with millions of records? ("use of Oracle Hints")
What is query to gather stats where degree of parallelism is 50?
What is Query to find duplicate rows?
What is error number for End of file communication error?
What is query to get number of weekends of current month?
How to convert time in to seconds?

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