How to delete duplicates in hive
WebSep 30, 2016 · I want to understand how Hbase internally handles duplicates records from a file. In order to experiment this, I have created an EXTERNAL table in hive with HBase specific configuration properties like table properties, SERDE, column family. I have to create the table in HBase with column family as well, which I did. WebMar 27, 2024 · we don't need to write all the column name in sql code by this way: select * from ( select *, row_number () over (partition by (col1, col2) order by col1) …
How to delete duplicates in hive
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WebApr 6, 2024 · Personally I would not do this (I would pre-delete all the referenced data and manually check the integrity). See: Can foreign key constraints be temporarily disabled using T-SQL? Quote:-- disable all constraints EXEC sp_msforeachtable "ALTER TABLE?NOCHECK CONSTRAINT all" Copy. Delete your data once the constraints are disabled, but remember … WebJun 11, 2015 · I'd suggest a 2 steps approach. step 1: create a temp table with the duplicate record list inserted, using insert and select like so: CREATE TABLE #Temp ( product_Name Char ( 30 ), Date Date, CustomerID int ); INSERT INTO #temp (product_Name, Date, CustomerID) select x.dup, x. [Product_name] as nameX , x.
WebJun 2, 2016 · With duplicates As (Select *, ROW_NUMBER () Over (PARTITION by record_indicator Order by record_indicator) as Duplicate From table_name) delete from duplicates Where Duplicate > 1 ; This query is giving me an error. Amazon Invalid operation: syntax error at or near "delete"; WebApr 7, 2024 · You can use analytical function to get the duplicate row as: select * from (select Id,Name,Technology, row_Number() over (partition By Id,Name order by id desc) as row_num from yourtable)tab where row_num > 1; This will give you output as: id Name …
WebMar 8, 2024 · Remove duplicates. Here we are doing a simple SELECT with a distinct and an INSERT. Note that when we are selecting and inserting the records from and to the same … WebAug 30, 2024 · Click on Preview data and you can see we still have duplicate data in the source table. Add a Sort operator from the SSIS toolbox for SQL delete operation and join …
WebApr 7, 2024 · MySQL supports JOINs in DELETE statements. If you want to keep the first of the duplicates: If you want to keep the first of the duplicates: DELETE a FROM MYVIEWS a JOIN ( SELECT MIN (t.a1) AS min_a1, t.k1, t.k2, t.k3 FROM MYVIEWS t GROUP BY t.k1, t.k2, t.k3 HAVING COUNT ( * ) > 1 ) b ON b.k1 = a.k1
Web3 Answers Sorted by: 65 This is where the window function row_number () comes in handy: SELECT s.siteName, s.siteIP, h.date FROM sites s INNER JOIN (select h.*, row_number () over (partition by siteName order by date desc) as seqnum from history h ) h ON s.siteName = h.siteName and seqnum = 1 ORDER BY s.siteName, h.date Share gummer building apartmentsWebApr 13, 2024 · Solution 1: You can try the following approach: Product.where.not( id: Product.group(:legacy_id, :company).pluck ('min (products.id)') ).delete_all Or pure sql: delete from products where id not in ( select min(p.id) from products p group by p.legacy_id, p.company ) Activerecord Duplicates Rails Activerecord Ruby On Rails Sql bowling captions for instagramWebMay 16, 2024 · Dedupe (De Duplicate) data in HIVE Sometimes, we have a requirement to remove duplicate events from the hive table partition. There could be multiple ways to do … bowling cap malo horaireWebSep 4, 2024 · How to remove duplicate records from a hive table? You can use the GROUP BY clause to remove duplicate records from a table. For example, consider below Hive … gummercraft launcherWebSep 17, 2024 · Remove Duplicate Records from Hive Table Test Data. We will be using below test data in all our examples. Let us discuss these methods with an example. Insert … bowling carcassonneWebJun 20, 2024 · Use regexp_replace to replace consecutive multiple spaces with one space character. select customer_id,regexp_replace (trim (first_name),' +',' ') from customer Share Follow answered Jun 20, 2024 at 16:18 Vamsi Prabhala 48.4k 4 35 56 Hi Vamsi, your query works. Also, VK_217 translate is good. gummer group portalWebIf you want to eliminate the duplicates, use the same SQL code you have above and delete any rows with Ranking > 1. This will leave you with one copy of each row with the same unique key (e.g. Product, Location, Customer, OrderID ). Share Improve this answer Follow edited Jul 27, 2015 at 10:34 dakab 5,259 9 43 65 answered May 23, 2013 at 19:42 gummer family instagram account