Find and remove duplicate records in a table | delete duplicates from a table

#etlqalabs #etl #sqlinterviewquestionsandanswers #linux

How to remove duplicates from a table in oracle ? | 2 ways to delete duplicate record from a table
1) Using Temporary table
2) using max(rowid)
3) using min(rowid)

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[saravanagovindaswamy]

Tons of thanks no words to say you are explaining each and every topic so in-depth with simple way.

[venkataharishp]

very good explanation sir, thank you for helping us all.

[gagandeepkrishna]

Hello sir, I am watching all the videos in this playlist from the beginning. your explanation is very clear. Got a doubt while watching this video, while grouping by what should be the parameter to chose the columns? in this video you have chosen empno, empname and deptno under group by condition, can you please say why is that so?

[STEAVEJOBS-kbdx]

just now ATTENDED Infosys interview they asked the same question?

how to remove DUPLICATE FROM TO YOU SIR...🤢

CAN YOU DELETE THE ALL DUPLICATES WITH SINGLE LINE QUERY?----struggled a bit?

[pmk_full_facts_]

Can you please tell me what is Decode and case

[prathibhavalathati]

Hello from removing duplicates how to select records other than duplicates, can u tell me the query
For eg: 1
2
2
3
4
4
From above table I want only 1 and 3 records, o/p is 1
3
How will I get this??? Please share video about this type of some interview questions..?

[vineetaverma]

Hi Sir, how to remove duplicate with certain conditions? like I need to delete 4 records out of 5 from target having name=error.

[spoilerskid]

Hello Sir, Can we use row_number() Over ( partition by emp_id) ?? Please check if i have written correctly ?
ps: (Not executed query)


Delete from (
select emp_id, emp_name, emp_salary,
Row_Number() Over ( partition by emp_id) as rn) a where rn> 1;

[venkateshvenky]

Hiii sir
How to find out duplicates
We have 100 columns in the table. I want duplicates with 100 column names