from子句中的列“ idproduct”不明确

Question

I have this messy join query using 3 tables:

SELECT p.idproduct, p.name, m.sust, p.desc, pp.p_v
FROM products As p
LEFT JOIN meds As m ON m.idproduct = p.idproduct
NATURAL JOIN products_prices As pp
INNER JOIN suc_products As sp ON sp.idsuc = 'SUC1' AND sp.idproduct = p.idproduct
WHERE p.bars = '1';

I get this error:

Error Code: 1052. Column 'idproduct' in from clause is ambiguous

Need help, please.

Answer 1

Here's a wild guess: your product_prices table has an idproduct column and MySQL is complaining that it doesn't know if it should use m.idproduct or p.idproduct for the join.

Try changing the NATURAL JOIN to an INNER JOIN with an explicit ON condition.