选择中多个条件的MySQL查询语法

Question

Hello everyone I am having trouble with mysql query select syntax

WHERE ((a.product_id = b.product_id) AND (b.category_id = '20') AND (a.product_publish = '1') AND ( a.product_manufacturer_id = 2 ) AND (a.extra_field_10 = 92 ) AND (a.product_price BETWEEN 171 AND 631 ))

do you see any problem here?? (maybe missing quotes)

category_id (integer)
product_publish (integer)
extra_field_10  (integer)
product_price (integer)
manu (integer)

if you ask why are there brackets they are here because of multiple conditions like

WHERE ((a.product_id = b.product_id) AND (b.category_id = '20' || b.category_id = '21') AND (a.product_publish = '1') AND ( a.product_manufacturer_id = 2 ) AND (a.extra_field_10 = 92 || a.extra_field_10 = 11 ) AND (a.product_price BETWEEN 171 AND 631 ))

SELECT is correct FROM is correct too values are correct it has to be syntax problem which i am missing

UPDATED * ** * ***

• there are no errors sql just return false
• i know brackters are not neccesary but also they dont make errors
• columns are ok i am using similar selects and they work ok but this one cant work right

UPDATED * ** * ** * ** * ** * ***

looks like there has to be problem somwhere else i will update this post when i figure out real problem maybe it could help someone in the future

Answer 1

You do not need so many parenthesis in your code. It would be interesting also you post your table in http://sqlfiddle.com/ .
I believe this query (if all the fields in your query exist) will work.
ps: If a field is integer you do not need quotes provided.

WHERE a.product_id = b.product_id AND b.category_id = 20 AND a.product_publish = 1
AND product_manufacturer_id = 2  AND a.extra_field_10 = 92 AND a.product_price BETWEEN 171 AND 631