In PostgreSQL, the DELETE statement is used to remove rows from a table. This can be done conditionally (based on a WHERE clause) to delete specific rows, or without conditions to remove all rows in a table. Proper use of DELETE ensures that only the desired data is removed, while cautio...
When a Postgres user is no longer needed, you can delete/drop it via theDROP USERcommand. In Postgres, theDROP USERcommand allows us to delete or drop a single user or multiple users simultaneously. TheDROP USERcommand can accept the IF EXISTS option to check the user’s existence before ...
How to uninstall PostgreSQL and reinstall PostgreSQL & PostGIS & pgAdmin4? 1. Uninstall PostgreSQL 1. List all the packages related with PostgreSQL dpkg -l |grep postgres For example, this is what I found on my Ubuntu 16.04 1.2. Delete all the packages listed above sudo apt-get --purge ...
PostgreSQL provides multiple ways to find and delete duplicate rows in PostgreSQL. This post discusses the below-listed methods to find and delete duplicate rows in PostgreSQL: ● How to Find Duplicate Rows in PostgreSQL? ● How to Delete Duplicates in Postgres Using a DELETE USING Statement? ●...
This article reviews how to use the basic data manipulation language (DML) types INSERT, UPDATE, UPDATE JOINS, DELETE, and UPSERT to modify data in tables.
Each sub-step has two queries: 1) to count the number of records that will be deleted; and 2) to actually delete them. If you confirm there's no record to be deleted, there's no meaning on running thedeletestatement. The queries below were ...
You may find a circumstance where you have forgotten the password for the AX admin user, but do not have adequate licenses available to add another user through the aclconfig page. Manually deleting a user in the PostgreSQL database will allow you to add a new admin user and resolve the ...
We can delete the table we created by typing: DROP TABLE playground_equip; DROP TABLE If we give that command to a table that does not exist, we will receive the following error: ERROR: table "playground_equip" does not exist To avoid this error, we can tell postgreSQL to d...
When we run this statement, it will delete all rows that have a product_name of Couch. In this example it will delete one row. This query will work in all variations of SQL: Oracle, SQL Server, MySQL, PostgreSQL, and more. You’ll get an output like this: 1 row(s) deleted. Here...
Inside the PostgreSQL, I created a trigger to cancel the command insert / update / delete if certain conditions are not fulfilled, This example triggernya in PostgreSQL. like this : CREATE OR REPLACE FUNCTION Trigger_TblMaster() RETURNS TRIGGER AS $Trigger_TblMaster$ DECLARE BEGIN if ...