INTERVIEW QUESTIONS DATABASE SQL DETAILS

Question: How to display duplicate rows in a table?

Answer: select * from emp

group by (empid)

having count(empid)>1

select * from emp

group by (empid)

having count(empid)>1
Source: CoolInterview.com

select * from emp where EmpID in(select EmpID
from emp
group by EmpID having count(EmpID)>1) Source: CoolInterview.com

select * from emp where rowid not in (select max(rowid) from emp group by empid) order by empid; Source: CoolInterview.com

select * from tablename group by all table column having count(id)>1 Source: CoolInterview.com

select Emp_Name, COUNT(Emp_name)duplicate_names from Employee group by Emp_name having COUNT(Emp_Name)>1
Source: CoolInterview.com

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