My table having unique id, delete duplicate records

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In this image there are two kavya with differnt id's ... but every field same for that 2 rows... I need to echeck atleast 5 fields and if those five fileds are found to be same means i want to delete one row and keep oneIn my database duplicate records are stored.. every columns except id is same for two rows... now i need to delete one record among the two duplicate records and keep one safe

Delete from table_Name A
Where exists (select 1 
From table_Name B
Where =

How to remove Duplicate Records except a single record in MySQL?, How do you delete duplicate records in MySQL and keep one record? In the table, we have a few duplicate records, and we need to remove them. SQL delete duplicate Rows using Group By and having clause. In this method, we use the SQL GROUP BY clause to identify the duplicate rows. The Group By clause groups data as per the defined columns and we can use the COUNT function to check the occurrence of a row.

You'll want something like:

DELETE FROM tbl_name WHERE condition LIMIT 1

The condition will find the two rows. The LIMIT will delete just one of them.

Read up on MySQL's [DELETE][1].

Different ways to SQL delete duplicate rows from a SQL Table, Which clause is used to remove the duplicate rows of the table? Using a subquery to find each ROWID (which is a unique number given to each row in an Oracle table) and the ROW_NUMBER function to find a sequential number for that row, grouped by the fields you specify as unique. Find the ROWID values that are identified as duplicates. Delete rows that match these ROWIDs. The query looks like this:

In MySQL, you can use join with delete:

delete t
    from t join
         (select t.col1, t.col2, . . . ., min( as min_id
          from t
          group by t.col1, t.col2, . . .
         ) tt
         using (col1, col2, . . . )
    where > tt.min_id;

My table having unique id, delete duplicate records, Delete from table_Name A Where exists (select 1 From table_Name B Where A.​id = );. Once you’ve found the duplicate records in a table, you often want to delete the unwanted copies to keep your data clean. If a table has a few duplicate rows, you could do this manually one by one by using a simple DELETE statement. However, it is time-consuming to do it manually if the table has a large number of duplicate records.

Find and Remove Duplicate Rows from a SQL Server Table, HAVING COUNT(*) > 1; In the output above, we have two duplicate records with ID 1 and 3. To remove this data, replace the first Select with the SQL delete statement as per the following query. SQL delete duplicate Rows using Common Table Expressions (CTE) We can remove the duplicate rows using the following CTE. Luckily, I found another solution which seems to fit my requirement. We can use ALTER IGNORE to add UNIQUE INDEX to the table and remove the duplicate rows at the same time. The query is: ALTER IGNORE TABLE table1 ADD UNIQUE INDEX index_on_category_image_set_id(category, image_set_id) But I soon realized it did not work. Why?

How to Remove Duplicate Rows in MySQL {3 Ways to Delete}, The second case is that table does not have a primary key or any unique indexes and contains duplicate rows which should be removed. If your driving column is unique for each group, but may have duplicates elsewhere in the table, you'll need a correlated delete. Insert dates fall into this category. In contrast, if the defining column is unique across the whole table, you can use an uncorrelated delete. A good example of this is an id column which is the table's primary key.

How To Delete Duplicate Rows in PostgreSQL, To do so follow the instructions below. 1. Create a intermediate table that has the same transfer the unique rows found in SELECT DISTINCT id, day,  DELETE Duplicate Records Using ROWCOUNT So to delete the duplicate record with SQL Server we can use the SET ROWCOUNT command to limit the number of rows affected by a query. By setting it to 1 we can just delete one of these rows in the table. Note: the select commands are just used to show the data prior and after the delete occurs.

  • Not an unusual request on this site try searching for mysql delete duplicate (and try something).
  • This does not work in MySQL, because you cannot refer to the table being deleted elsewhere in the query.
  • i have only one table
  • you have put all column name in where clouse
  • i am having doubt in that condition only