mysql两张表相同数据查询显示其中一张表的字段

如：
数据表：A1
字段：B1，B2，B3
数据：Y1，Y2，Y3
很多条记录

数据表：A2
字段：B1，B2
数据：Y1，Y2

SELECT A1.B1, A1.B2, A1.B3
FROM A1 INNER JOIN A2 ON A1.B1 = A2.B1 AND A1.B2 = A2.B2 and A2.B3 = 1

三表不查询重复记录

select goods.id,goods.description,goods.attributes, categories.`name`,categories.enamefrom (goods inner join categories on goods.category_id = categories.category_id)INNER JOIN attribute on goods.attributes = attribute.namewhere categories.`level` = 1