Delete Duplicate Rows from a Table Using the Cursor

This is an advanced solution to delete duplicate Rows from a table using the cursor:

 create table DupTable (    Field1 varchar(20))goinsert DupTable (Field1)    select 'A11111111' UNION ALL    select 'B22222222' UNION ALL    select 'C33333333' UNION ALL    select 'C33333333' UNION ALL    select 'C33333333' UNION ALL    select 'A11111111' UNION ALL    select 'B22222222' UNION ALL    select 'A11111111'declare @sql varchar(255),        @name varchar(32),        @count intdeclare MyCursor insensitive cursor forselect Field1, (count(1)-1) ExcssCount from DupTable group by Field1 having count(1) > 1open MyCursorfetch next from MyCursor into @name,@countwhile @@fetch_status = 0begin    select @sql =    'set rowcount ' + convert(varchar(9), @count) + '    delete DupTable where field1 = "' + @name + '"'    exec (@sql)    print @sql    fetch next from MyCursor into @name, @countend-- while fetchclose MyCursordeallocate MyCursorset rowcount 0select * from DupTabledrop table DupTable
Share the Post:
Share on facebook
Share on twitter
Share on linkedin


The Latest

microsoft careers

Top Careers at Microsoft

Microsoft has gained its position as one of the top companies in the world, and Microsoft careers are flourishing. This multinational company is efficiently developing popular software and computers with other consumer electronics. It is a dream come true for so many people to acquire a high paid, high-prestige job

your company's audio

4 Areas of Your Company Where Your Audio Really Matters

Your company probably relies on audio more than you realize. Whether you’re creating a spoken text message to a colleague or giving a speech, you want your audio to shine. Otherwise, you could cause avoidable friction points and potentially hurt your brand reputation. For example, let’s say you create a

chrome os developer mode

How to Turn on Chrome OS Developer Mode

Google’s Chrome OS is a popular operating system that is widely used on Chromebooks and other devices. While it is designed to be simple and user-friendly, there are times when users may want to access additional features and functionality. One way to do this is by turning on Chrome OS