返回字段并计数在同一条sql中

Question

I have a specific query i can't figure out how to get done.

I need to return the values of my articles table named Articulos, and count how many times each article is used on every budget.

i have a detail table called pre_detalle which contains a field called idart, where the articulos.id are written in case of being included.

i need each counter to be returned as cont_num.

this is the query i tried to develop:

SELECT *, COUNT(articulos.id) as cont_num
FROM articulos
WHERE articulos.id IN(SELECT idart FROM pre_detalle)
GROUP BY articulos.id
ORDER BY cont_num

Answer 1

In most cases, you need to count a list of item that you display.
In most cases, you will use a pagination system to display your rows of data.
In most cases, if you try to do it with the same query, it will simply fail.
So, maybe you should get in mind to do it using one query to count the rows and another one to get the rows you want.

In most cases, this answer could help you (in a proper way).

Answer 2

this is what i needed to do, a couple hours later and after lots of tries i managed to get it working. SELECT articulos. , (SELECT COUNT( ) FROM pre_detalle WHERE pre_detalle.idart = articulos.id) AS cont_num FROM articulos