Skip to content
  • Home
  • About
    • Privacy Policy
  • Categories
    • Hiking & Activities
    • Outdoor Gear
    • Regional Specifics
    • Natural Environments
    • Weather & Forecasts
    • Geology & Landform
Geoscience.blogYour Compass for Earth's Wonders & Outdoor Adventures
  • Home
  • About
    • Privacy Policy
  • Categories
    • Hiking & Activities
    • Outdoor Gear
    • Regional Specifics
    • Natural Environments
    • Weather & Forecasts
    • Geology & Landform
Posted on February 6, 2023 (Updated on July 10, 2025)

Deleting duplicate records in the attribute table and keep the minimum value in PyQGIS?

Hiking & Activities

How do I delete a field in Pyqgis?

To delete a field, simply can be used deleteAttributes method from data provider class. The method required a list that contains field index to be deleted.
 

What do you need to remove duplicate values within the table?

Follow these steps:

  1. Select the range of cells, or ensure that the active cell is in a table.
  2. On the Data tab, click Remove Duplicates .
  3. In the Remove Duplicates dialog box, unselect any columns where you don’t want to remove duplicate values.

Which option can be used to remove duplicate records?

Select the range of cells with duplicate values you want to remove. 2. Next, locate the ‘Remove Duplicates‘ option and select it. Data tab → Data Tools section → Remove Duplicates.
 

How do we remove duplicate values in a given data?

Remove duplicate values

  1. Select the range of cells that has duplicate values you want to remove. Tip: Remove any outlines or subtotals from your data before trying to remove duplicates.
  2. Click Data > Remove Duplicates, and then Under Columns, check or uncheck the columns where you want to remove the duplicates.
  3. Click OK.


What is __ Delete __ in Python?

__delete__ is used to delete the attribute of an instance i.e removing the value of attribute present in the owner class for an instance. Note: This method only deletes the attribute which is a descriptor. Syntax: def __delete__(self, instance): body of delete . .
 

What are the different ways of deleting a field?

Delete a field from a query

  • In the Navigation Pane, right-click the query, and then click Design View.
  • In the query design grid, select the field that you want to delete, and then press DEL.
  • Close and save the query.


How do I remove duplicate rows and keep the highest value only?

(1) Select Fruit column (which you will remove duplicates rows by), and then click the Primary Key button; (2) Select the Amount column (Which you will keep highest values in), and then click Calculate > Max. (3) Specify combination rules for other columns as you need.
 

How do I remove duplicates but keep one value?

Remove all duplicates but keep only one with Remove Duplicates function

  1. Select the data list you need, and click Data > Remove Duplicates.
  2. Then in Remove Duplicates dialog, check the column name that you want to remove duplicates from, and if your data has header, check My data has headers option, too.
  3. Click OK.


How do you remove duplicates from a table without using distinct?

Below are alternate solutions :

  1. Remove Duplicates Using Row_Number. WITH CTE (Col1, Col2, Col3, DuplicateCount) AS ( SELECT Col1, Col2, Col3, ROW_NUMBER() OVER(PARTITION BY Col1, Col2, Col3 ORDER BY Col1) AS DuplicateCount FROM MyTable ) SELECT * from CTE Where DuplicateCount = 1.
  2. Remove Duplicates using group By.

 

How do you Delete a field in GIS?

Delete a field from the Table view

  1. From the layer’s item page, click the Data tab to show the table. Note:
  2. If your hosted feature layer contains more than one sublayer, choose the sublayer you want to alter from the Layer drop-down menu.
  3. Click the column containing the field you want to delete.
  4. Click Delete.


How do you Delete a custom field?

Before deleting a custom field, consider where it’s referenced.



Required Editions and User Permissions

  1. From the management settings for the field’s object, go to Fields.
  2. Click Del next to the name of the field.
  3. When prompted, select the Yes, I want to delete the custom field checkbox to confirm, and click Delete.


How do I Delete a field in Drupal?

use Drupal\field\Entity\FieldStorageConfig; use Drupal\field\Entity\FieldConfig; // Deleting field storage. FieldStorageConfig::loadByName(‘entity_type’, ‘field_name’)->delete(); // Deleting field. FieldConfig::loadByName(‘entity_type’, ‘bundle’, ‘field_name’)->delete();
 

New Posts

  • Headlamp Battery Life: Pro Guide to Extending Your Rechargeable Lumens
  • Post-Trip Protocol: Your Guide to Drying Camping Gear & Preventing Mold
  • Backcountry Repair Kit: Your Essential Guide to On-Trail Gear Fixes
  • Dehydrated Food Storage: Pro Guide for Long-Term Adventure Meals
  • Hiking Water Filter Care: Pro Guide to Cleaning & Maintenance
  • Protecting Your Treasures: Safely Transporting Delicate Geological Samples
  • How to Clean Binoculars Professionally: A Scratch-Free Guide
  • Adventure Gear Organization: Tame Your Closet for Fast Access
  • No More Rust: Pro Guide to Protecting Your Outdoor Metal Tools
  • How to Fix a Leaky Tent: Your Guide to Re-Waterproofing & Tent Repair
  • Long-Term Map & Document Storage: The Ideal Way to Preserve Physical Treasures
  • How to Deep Clean Water Bottles & Prevent Mold in Hydration Bladders
  • Night Hiking Safety: Your Headlamp Checklist Before You Go
  • How Deep Are Mountain Roots? Unveiling Earth’s Hidden Foundations

Categories

  • Climate & Climate Zones
  • Data & Analysis
  • Earth Science
  • Energy & Resources
  • General Knowledge & Education
  • Geology & Landform
  • Hiking & Activities
  • Historical Aspects
  • Human Impact
  • Modeling & Prediction
  • Natural Environments
  • Outdoor Gear
  • Polar & Ice Regions
  • Regional Specifics
  • Safety & Hazards
  • Software & Programming
  • Space & Navigation
  • Storage
  • Water Bodies
  • Weather & Forecasts
  • Wildlife & Biology

Categories

  • Climate & Climate Zones
  • Data & Analysis
  • Earth Science
  • Energy & Resources
  • General Knowledge & Education
  • Geology & Landform
  • Hiking & Activities
  • Historical Aspects
  • Human Impact
  • Modeling & Prediction
  • Natural Environments
  • Outdoor Gear
  • Polar & Ice Regions
  • Regional Specifics
  • Safety & Hazards
  • Software & Programming
  • Space & Navigation
  • Storage
  • Water Bodies
  • Weather & Forecasts
  • Wildlife & Biology
  • English
  • Deutsch
  • Français
  • Home
  • About
  • Privacy Policy

Copyright (с) geoscience.blog 2025

We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
Do not sell my personal information.
Cookie SettingsAccept
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
CookieDurationDescription
cookielawinfo-checkbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
SAVE & ACCEPT