1.如何替换某个字段的一些字符如我把products表的products_image字段中包含2011的字符替换成Zencart2012update `products` set `products_image`=replace(`products_image`,'2011','zencart2012');2.修改表的字段的长度如我把products表的products_image字段长度修改为varchar(300)ALTER TABLE products MODIFY product_image varchar(256) ;3.清空某个表的所有属性如清空products表的所有数据信息truncate TABLE products;4.查询某个时间段订单,也可以自己扩展查询某个时间段的产品或者新闻SELECT * FROM `orders` WHERE `date_purchased` BETWEEN '2010-05-22 00:00:00' AND '2012-02-01 00:00:00' order by orders_id desc5.SQL组合查询，查询某个类别的商品“select distinct p.products_id, p.products_image, p.products_tax_class_id, pd.products_name,p.products_date_added, p.products_price, p.products_type, p.master_categories_idfrom ” . TABLE_PRODUCTS . ” p, ” . TABLE_PRODUCTS_DESCRIPTION . ” pd,where p.products_id = pd.products_id and p.products_id in(select products_id from ".TABLE_PRODUCTS_TO_CATEGORIES." where categories_id=你要显示的类别)and pd.language_id = ‘” . (int)$_SESSION['languages_id'] . “‘and p.products_status = 1 ” . $display_limit建议使用下面这种“select distinct p.products_id, p.products_image, p.products_tax_class_id, pd.products_name,p.products_date_added, p.products_price, p.products_type, p.master_categories_idfrom ” . TABLE_PRODUCTS . ” p, ” . TABLE_PRODUCTS_DESCRIPTION . ” pd,”. TABLE_PRODUCTS_TO_CATEGORIES . ” pcwhere p.products_id = pd.products_id and pc.categories_id in(54,55,62,67,61)and pd.language_id = ‘” . (int)$_SESSION['languages_id'] . “‘and p.products_status = 1 ” . $display_limit6.获取zencart所有分类下拉菜单的函数zen_draw_pull_down_menu('selectoption', zen_get_category_tree(), array_pop($arr), 'id="list"');
转载于:https://www.cnblogs.com/alex-13/p/3667733.html
