WebApr 28, 2008 · 1) first, if you insert and DELETE records - we'll definitely reuse rowids. rowids are unique within a table - period. We reuse them over time - absolutely. So if you delete … WebJan 29, 2016 · You need to do this on your duplicate column group. Take the minimum value for your insert date: Copy code snippet delete films f where insert_date not in ( select min …
Deleting duplicate records without using rowid and rownum - Oracle
WebJan 6, 2024 · OPEN c_delete_rows; LOOP FETCH c_delete_rows BULK COLLECT INTO rows_deleted LIMIT v_limit; --FETCH ROWS TO BE DELETED USING ROWID --close c_delete_rows; DBMS_OUTPUT.PUT_LINE ('inside first blck '); DBMS_OUTPUT.PUT_LINE ('row count for deletion is ' rows_deleted.COUNT ); FOR indx IN 1 .. rows_deleted.COUNT … delete t1 from tab1 t1 join tab1 t2 on t1.rowid > t2.rowid and t1.col1 = t2.col1 and t1.col2 = t2.col2 Or this (it works on mssql, I believe oracle has the same syntax);WITH [CTE DUPLICATE] AS ( SELECT ROW_NUMBER() OVER (PARTITION BY col1, col2 ORDER BY id) RN FROM tab1 ) DELETE FROM [CTE DUPLICATE] WHERE RN > 1 side of a boat called
Delete duplicate rows from Oracle tables
WebMar 20, 2024 · Option 1. Here’s one option for removing duplicate rows from the above table: DELETE FROM Pets WHERE EXISTS ( SELECT 1 FROM Pets p2 WHERE … WebOct 13, 2015 · Use simple Union clause to delete duplicate records if you do not want to use row id for eaxmple select dept no from emp union select dept no from emp. What is Oracle? Oracle Training Tutorials for Beginners Difference Between Oracle 11g and 12c and 10g Import 12c Oracle Dump to 11g Ora 28001 The Password Has Expired Error WebJul 9, 2012 · DELETE my_emp WHERE ROWID NOT IN ( -- or use empno instead of ROWID SELECT MIN (ROWID) -- or use empno instead of ROWID FROM my_emp GROUP BY job ) ; Since empno is unique in the table, you could also use empno instead of ROWID. Just remember to use the same one consistently throughout the query. side of a laptop