On 05/28/2017 11:54 AM, Michelle Konzack wrote:
On 2017-05-28 11:23:47 Adrian Klaver hacked into the keyboard:
On 05/28/2017 10:53 AM, Michelle Konzack wrote:
SELECT * FROM products WHERE category IN
(SELECT categories.cat FROM categories WHERE
categories.serial = products.category);
Because you are comparing categories.cat
ehm no
Actually yes:
SELECT categories.cat FROM categories WHERE
categories.serial = products.category
is going to select categories.cat which is a varchar.
SELECT * FROM products WHERE category IN ...
is asking to select all fields from where the products.category field is
in the output of the above sub-select, which reduces down to
products.category = categories.cat
or
integer = varchar. As the error message says , that is not possible.
I want to replace in the output the numerical ID from "products.category"
with the value of "categories.cat", where the "products.category" match
the "categories.serial"
which is a varchar to
products.category which is an integer. The above is crying out for
FOREIGN KEYS. For the time being I going to assume products.category
is a faux FK to categories.serial so;
SELECT * FROM products WHERE products.category = categories.serial;
My mistake, it should be:
SELECT categories.cat, manufacturer, p_name, p_images, p_desc
FROM products, categories WHERE products.category = categories.serial;
This is not working
--
Adrian Klaver
adrian.kla...@aklaver.com
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