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Questions tagged sql
Explain the use of the MERGE statement in SQL.
How do you handle NULL values in SQL? Mention functions like COALESCE and ISNULL.
How do you optimize a long-running SQL query?
How would you handle duplicate records in an SQL table?
SQL query to find the second highest salary from each department.
What is the difference between a clustered and non-clustered index?
Write an SQL query to find duplicate emails in a users table.
Write a SQL query to find top 3 earners in each department.
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