Question

我有一个PHP表单，当我将字段留空时会出现错误。

抱歉，在重复密钥更新clientID ='45'，clientName ='Frank'上将此客户端sql = insert添加到db1.cleints（clientID，clientName）值（45，Frank）时出错了你的SQL语法;检查与MySQL服务器版本对应的手册，以便在第1行的“clientName”附近使用正确的语法

更新：我已经包含了代码。请不要理会我的上述内容只是一个修改过的例子。

 $sql = "insert into $DB.theater (dsc_id, dsc_lname, dsc_fname, distributor_id, distributor_name, distributor_theater_id, manager_id, manager_name, is_new_theater, name, phone_area, phone_exch, phone_local, phone_ext, street, city, state_prov, country, postal, web_site_url, manager_gender, theater_manager_name, email, location_desc, square_footage, year_founded, colors_techs, stylists, assistants, active_chairs, booth_renters, services, purchase_volume, products, other_lines, other_lines_txt, percent_women, demog_lt_20, demog_lt_35, demog_lt_55, demog_ge_55, avg_sale, avg_cut, avg_color, avg_hilite, rating, can_display, retail_sf, grade, dsc_notes) values ($dsc_id, '$dsc_lname', '$dsc_fname', $distributor_id, '$distributor_name', '$distributor_theater_id', $manager_id, '$manager_name', '$is_new_theater', '$name', '$phone_area', '$phone_exch', '$phone_local', '$phone_ext', '$street', '$city', '$state_prov','$country', '$postal', '$web_site_url', '$manager_gender', '$theater_manager_name', '$email', '$location_desc', '$square_footage', '$year_founded', '$colors_techs', '$stylists', '$assistants', '$active_chairs', '$booth_renters', '$services', '$purchase_volume', '$products', '$other_lines','$other_lines_txt', '$percent_women', '$demog_lt_20', '$demog_lt_35', '$demog_lt_55', '$demog_ge_55', '$avg_sale', '$avg_cut', '$avg_color', '$avg_hilite', '$rating', '$can_display', '$retail_sf', '$grade', '$dsc_notes') on duplicate key update dsc_id=$dsc_id, dsc_lname='$dsc_lname', dsc_fname='$dsc_fname', distributor_id=$distributor_id, distributor_name='$distributor_name', distributor_theater_id='$distributor_theater_id', manager_id=$manager_id, manager_name='$manager_name', is_new_theater='$is_new_theater', name='$name', phone_area='$phone_area', phone_exch='$phone_exch', phone_local='$phone_local', phone_ext='$phone_ext', street='$street', city='$city', state_prov='$state_prov', country='$country', postal='$postal', web_site_url='$web_site_url', manager_gender='$manager_gender', theater_manager_name='$theater_manager_name', email='$email', location_desc='$location_desc', square_footage='$square_footage', year_founded='$year_founded', colors_techs='$colors_techs', stylists='$stylists', assistants='$assistants', active_chairs='$active_chairs', booth_renters='$booth_renters', services='$services', purchase_volume='$purchase_volume', products='$products', other_lines='$other_lines', other_lines_txt='$other_lines_txt', percent_women='$percent_women', demog_lt_20='$demog_lt_20', demog_lt_35='$demog_lt_35', demog_lt_55='$demog_lt_55', demog_ge_55='$demog_ge_55', avg_sale='$avg_sale', avg_cut='$avg_cut', avg_color='$avg_color', avg_hilite='$avg_hilite', rating='$rating', can_display='$can_display', retail_sf='$retail_sf', grade='$grade', dsc_notes='$dsc_notes'";

Answer 1

insert into db1.cleints (clientID, clientName)
values (45, Frank)
on duplicate key update clientID='45', clientName='Frank'

未引用第一个Frank。

另外，值得注意的是on duplicate key update的整个目的是能够插入记录（如果它不存在）或者如果它已经存在则更新它。您正尝试使用已有的相同值进行更新。也许你想要INSERT IGNORE ...

回答更新后的问题：

我似乎不得不猜测。我有根据的猜测是你没有逃避输入数据。相反，您将它盲目地注入到SQL代码中。当数字字段留空时，不要用适当的NULL替换它;它只是转换为（空白）字符串：

echo "VALUES($one, $two, $three)";

...生成：

VALUES(1, , 3)

如果您在此类字段中键入字母，或者键入O'Hara，则可能会失败。

将字段留空时PHP表单错误

1 个答案: