WebMar 13, 2024 · You should do a small pl/sql block using a cursor for loop and delete the rows you don't want to keep. For instance: declare prev_var my_table.var1%TYPE; begin for t in (select var1 from my_table order by var 1) LOOP -- if previous var equal current var, delete the row, else keep on going. end loop; end; WebFeb 18, 2024 · This will remove all the records, by ID, that have a count (of title) greater than 0, but will not remove the latest ( max) record. NOTE: this is a very intensive query. Indexes on ID & Title are recommended and even then: sloooowwww. Ran this through just 100k records with indexes and still takes about 10 seconds. Share Improve this answer …
How to delete duplicate records - Snowflake Inc.
WebIf you want to delete the duplicates, here's a much simpler way to do it than having to find even/odd rows into a triple sub-select: SELECT id, name, email FROM users u, users u2 WHERE u.name = u2.name AND u.email = u2.email AND u.id > u2.id And so to delete: WebOct 20, 2024 · 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. swat kpk pakistan latitude and longitude
Delete duplicate rows with no primary key on a SQL Server table
Web3 Answers. Use a CTE (I have several of these in production). ;WITH duplicateRemoval as ( SELECT [name] ,ROW_NUMBER () OVER (PARTITION BY [name] ORDER BY [name]) ranked from #myTable ORDER BY name ) DELETE FROM duplicateRemoval WHERE ranked > 1; Explanation: The CTE will grab all of your records and apply a row number … WebJul 23, 2016 · To delete dupes without defining a desired primary key use this call: exec delete_dupes '_original'. To delete dupes based on a defined desired primary key use this call: declare @table1 as columnnames insert @table1 values ('salesrepid'), ('sale') exec delete_dupes '_original' , @table1. WebMay 6, 2014 · With the given example, inner query will return ids (1,6,4,5,7). The outer query will delete records from table whose id NOT IN (1,6,4,5,7). This fiddle shows the records which are going to be deleted using this method. Suggestion: Use the first method since it is faster than the latter. Also, it manages to keep only one record if id field is ... branston beans b\u0026m