sql高级

1:去重查交集

select
supplier_name supplierName,
supplier_url supplierUrl,
supplier_no supplierNo,
COUNT(1) as num
from ware_supplier
where product_no in 
                          #{item}
                
and is_del = 0 and in_shop = #{inShop,jdbcType=VARCHAR} GROUP BY supplier_url,supplier_name,supplier_no HAVING num >= #{count,jdbcType=INTEGER}

 2：清表语句

      truncate table ware_supplier;