WebIf 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 … WebOct 29, 2024 · Answer: To Find Duplicate Records in table you can use following query: select a.* from Employee a where rowid != (select max (rowid) from Employee b where a.Employee_num =b.Employee_num; CLICK HERE TO GET 20 COMPLEX SQL QUESTIONS 1.Command Used to fetch records: Select * from Employee;

Oracle SQL Interview Questions : Delete duplicate records

WebFeb 14, 2024 · This returns just the excess rows from the matching duplicates. So if there are two identical rows, it returns one of them. If there are three identical rows, it returns … WebDec 29, 2024 · SELECT DISTINCT * INTO duplicate_table FROM original_table GROUP BY key_value HAVING COUNT(key_value) > 1 DELETE original_table WHERE key_value IN (SELECT key_value FROM duplicate_table) INSERT original_table SELECT * FROM duplicate_table DROP TABLE duplicate_table This script takes the following actions in the … clean soleplate on iron

6 Ways to Select Duplicate Rows in Oracle - database.guide

WebSep 2, 2024 · 3.5K 130K views 5 months ago In this video, we see 10 different ways to remove duplicate records in SQL. We look at 2 different scenario for duplicate records in a table and then come... WebJan 6, 2010 · INSERT INTO Test1 VALUES (456789, 00, 6); INSERT INTO Test1 VALUES (456789, 01, 16); This is the Query i m using to avoid duplicate from table Test SELECT DISTINCT t1.ID, t1.TYPE, t1.other, t2.value FROM Test1 t1 INNER JOIN Test2 t2 ON t1.ID = t2.ID GROUP BY t1.ID, t1.TYPE, t1.other, t2.value ORDER BY t1.ID ASC; Query Result: WebMar 13, 2024 · DELETE FROM YourTable WHERE ROWID IN (WITH Duplicates AS (SELECT ROWID RID, ROW_NUMBER() OVER( PARTITION BY First_Name, Last_Name, Birth_Date) AS RN SUM(1) OVER( PARTITION BY First_Name, Last_Name, Birth_Date ORDER BY ROWID … clean sole plate of iron