I have two tables, Table_1 and Table_2. I want to compare one of the columns between the tables and have an output of the difference.
Specifically, I need to know which entries (of a column) of Table_1 are not present in table 2. I am using the EXCEPT operator but the numbers aren’t correct so I’d like to know how to make it case insensitive.
Here is my basic approach (without the case insensitive stuff):

Table 1:

How can we show the total sum of table along with group by sum. Here is the table
Table Name – Population

I encountered an issue while exporting data using SQLynx: no matter whether I choose to export to Excel, CSV, or SQL files, I consistently receive an error stating “File Not Generated”. I have attempted multiple re-exports, ensured the file path is correct and free of special characters, but the problem persists.

I have a query as follows:

Question :
Given two tables below, write a query to display the comparison result (higher/lower/same) of the average salary of employees in a department to the company’s average salary.

tengo dos tablas, una llamada empleado y la otra llamada usuario, en la tabla empleado tengo el campo de nombre, apellido, usuario y dni, y en la tabla usuario tengo los campos nombre de empleado, apellido de empleado, usuario de empleado y el dni de empleado, al ingresar datos a la tabla usuario quiero que valide que los datos esten en la tabla de empleado y si son los correctos los ingrese a la tabla, pero si no son iguales no deje ingresar a la tabla usuario, pero la llave primaria de la tabla empleado en el dni, y al relacionar el nombre, apellido y usuario me da erro, entiendo que es por que la unica llave primaria es el dni, como hago para solucionar este problema

I have something like a table having 2 columns -> component_names and component_types where the task is to remove te duplicates from the component_names for that component_types meaning same named coponent can be there across the types but not within.