WebTo find the differences between each subsequent changes, you need to compare two successive rows. We assume that there is no gap in the id column and the list price with the earlier valid from date is inserted before the list price with later valid from date, the following query compares prices between each change of the product id 100: SELECT ... WebCode language: plaintext (plaintext) Note that you still see the duplicate in the job_id column because the DISTINCT operator uses values from both job_id and salary to evaluate the duplicate, not just values in the job_id column.. SQL DISTINCT and NULL. In the database, NULL means unknown or missing data. Unlike values like numbers, strings, dates, etc. …

Oracle SQL Interview Questions : Delete duplicate records

WebSummary: in this tutorial, you will learn step by step how to delete duplicate records in Oracle Database using the DELETE statement with a subquery. Once you’ve found … Web21 nov. 2015 · We can put delimted text into a hash table, and thus can eliminate the duplicates. We use EXISTS method of collection here, to check if the value is already … fnf hop hop hights

Multiple Ways to Delete Duplicates from SQL Tables

WebYou can use regular expressions and regexp_replace to remove the duplicates after concatenation with listagg: SELECT Num1, RTRIM ( REGEXP_REPLACE ( (listagg (Num2,'-') WITHIN GROUP (ORDER BY Num2) OVER ()), ' ( [^-]*) (-\1)+ ($ -)', '\1\3'), '-') Num2s FROM ListAggTest; WebI usually use Oracle Analytic function ROW_NUMBER(). Say you want to check the duplicates you have regarding a unique index or primary key built on columns (c1, c2, … greenup co court records