SQL Interview Questions- Get Hired by Answering these Question

If you want to crack an SQL interview in one go, this beginner's guide is the one-stop solution for you.

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Without wasting time, let me share most frequently asked an SQL interview questions to you

1. How to find duplicates from given table
2. How to delete duplicates from given table
3. Difference between union and union All
4. Difference between rank,row_number and dense_rank
5. Find records in given table which are not present in another table
6. Find Second Highest salary employees in each departments
7. Find Employes with salary more than their manager’s salary
8. Difference between inner and left join
9. Update a table and swap gender value
10. No of Records in output with difference kind of joins

Let us drill down each question one by one

1.How to find duplicates from given table

To find duplicates in a table in SQL Server, you can use the GROUP BY and HAVING clauses with the COUNT function.

For example, if you want to find duplicates in the column “email” of a table “customers,” you can use the following query: