Skip to main content

Posts

Showing posts with the label Query to delete duplicate records from table using sql

Query to delete duplicate records from table using sql

Query to delete duplicate records from table using sql select * from test where exists (select * from test as t where test.id=t.id having count(*)>1 and min(t.id) !=test.id.); How to Remove Duplicates from a Single Column SQL Table To Remove Duplicates from a Single Column Table in sql you can use temparary table concept and can try this way lock tables Table1 write; drop temporary table if exists TestTmp; begin work; create temporary table TestTmp select distinct * from Table1; delete from Table1; insert into Table1 select * from TestTmp; unlock tables; commit; delete all the duplicate rows in the table of SQL database If the table is not having an unique column you can use the below: DELETE FROM _Table1 WHERE _Table1.ID IN -- List 1 - all rows that have duplicates (SELECT F.ID FROM _Table1 AS F WHERE Exists (SELECT Field1, Field2, Count(ID) FROM _Table1 WHERE _Table1.Field1 = F.Field1 AND _Table1.Field2 = F.Fi