IBM Infosphere Datastage, Netezza, Microstrategy, SSIS, SSRS,Hadoop, BI, ETL, Data warehouse, SQL Server, Tableau, mongoDB
rowid is a hidden column in all netezza tables
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My favorite query for finding/deleting duplicates is using rowid:select *--delete from table_with_duplicate t_remove_thiswhere exists (select 1 from table_with_duplicate t_keep_this where t_remove_this.keyfield1 = t_keep_this.keyfield1 and t_remove_this.keyfield2 = t_keep_this.keyfield2 and t_remove_this.keyfield3 = t_keep_this.keyfield3 and t_remove_this.keyfield1.rowid > t_keep_this.rowid)
last line must be and t_remove_this.rowid > t_keep_this.rowid)
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