Scenario 2.a: Delete Duplicate rows but keep one using CTE We need to use the technique of Self Join initially to check for duplicate records containing different custid but same passport number. select distinct a.* from customers2 a join customers2 b on a.custid <> b.custid and a.CustN...
How to Delete Duplicate Records in SQL Server Usually on daily basis we usually need to perform removing duplicate records from a table. This post can help you to understand “How to Delete Duplicate Records in SQL Server”. Here consider an example for removing duplicate records. IF EXISTS(SE...
If you want to delete duplicate records you could use@imobsuz's method, use row_number() to calculate your records in the table, join two table by unique column in delete query and delete those records that you didn't need. If you want to delete one record from (select distinct...
avoid insertion of duplicate entries in a BULK INSERT statement Bad performance of EXCEPT operator Basic - select with fixed values - invert columns to rows Basic CTE query, get full path of something recursive BCP Error - Copy direction must be either 'in', 'out' or 'format'. BCP Export...
5 | 5 (3 rows) gaussdb=# DELETE FROM vvt1t2 WHERE y2 = 5; DELETE 1 gaussdb=# SELECT * FROM vvt1t2; x1 | y1 | x2 | y2 ---+---+---+--- 1 | 1 | 1 | 1 2 | 2 | 2 | 2 (2 rows) -- The view contains CHECK OPTION, and the tdata table is duplicate. td1 is...
ORDERBYid)ASDuplicateCount FROM[SampleDB].[dbo].[employee]) SELECT* FROMCTE; In the output, if any row has the value of [DuplicateCount] column greater than 1, it shows that it is a duplicate row. We can remove the duplicate rows using the following CTE. ...
Employee Id Name 1 A 2 B 1 A 5 V 2 B ___ Delete duplicate rows from the table with out using CTE? Reply Answers (5) Interview question Difference between NOT IN and exists in sql server?About Us Contact Us Privacy Policy Terms Media Kit Sitemap Report a Bug FAQ...
Next, we’ll order our data using a select query inside a common table expression that we won’t finish yet to see what our output will look like. Since we want to removed the ordered data that show a duplicate id (in this case, 2), we’ll create a query with the ROW_N...
Using CTE ...you can remove duplicate records in one query... Was this answer useful? Yes ReplyNaveen Jun 16th, 2017 Insert the distinct rows from the duplicate rows table to new temporary table. Delete data from table which has duplicate rows then insert the distinct rows from the...
If you have rows that differ from each other, you can use an other method to delete duplicate rows in a table. For example if you have inserted date column and you want to keep the first rows inserted into the table by ordering due to the insert date column, you can use the ROW_NUM...