The first method involves using the built-in attribute `RowID`. This unique identifier can help you pinpoint and remove duplicate rows. The self-join technique is another method for identifying ...

Let's create a table with duplicate rows in SQL. create table CustomerDuplicate(customer_id int,customer_name varchar(20)) insert into CustomerDuplicate values(1,'Adam') insert into CustomerDuplicate ...

The delete query should delete all duplicate rows except one. Here is the SQL query that does the job. PARTITION BY divides the query result set into partitions.

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日本オラクル 専務執行役員 データベース事業統括の三澤智光氏は、Oracle Big Data SQLのアーキテクチャを「データベース統合型」と説明。従来、RDB、NoSQL、Hadoopの各種データソースを統合的に扱えるようにするためには、それぞれのシステムのインタフェースを互いに連携させるフェデレーション ...