Question

我正在运行查询以检索我的数据的所有客户。由于新的法律，并非所有客户都存储了地址，因此我有一些空值。如果我运行“主”查询来检索剩下的加入另一个表的所有客户，那么它将很好地工作。当我尝试添加搜索词时，它仍然为我提供了整个集合，而不是根据搜索词对其进行过滤。我做错了什么？

我尝试不使用左联接而仅在WHERE的情况下重写查询。c.customers_id = a.customers_id，但是因为a.customers_id并不总是被填充，所以我得到的客户比我少了

select 
c.customers_id, c.customers_firstname, c.customers_lastname, c.customers_email_address, c.customers_account_validated, c.customers_payment_period, a.entry_country_id, a.entry_company 
from customers c 
left join address_book a on c.customers_id = a.customers_id 
and c.customers_default_address_id = a.address_book_id 
and (c.customers_lastname like '%adolfs%' 
or c.customers_firstname like '%adolfs%' 
or c.customers_email_address like '%adolfs%' 
or a.entry_company like '%adolfs%' or c.customers_id = 'adolfs') 
order by c.customers_id DESC

我希望所有在电子邮件地址中使用“ adolfs”作为名字，姓氏，公司名称的客户的结果

Answer 1

and (c.customers_lastname like '%adolfs%' 
or c.customers_firstname like '%adolfs%' 
or c.customers_email_address like '%adolfs%' 
or a.entry_company like '%adolfs%' or c.customers_id = 'adolfs')

这些应该位于where子句中，而不是您的联接的一部分

select 
c.customers_id, c.customers_firstname, c.customers_lastname, 
c.customers_email_address, c.customers_account_validated, 
c.customers_payment_period, a.entry_country_id, a.entry_company 
from customers c 
left join address_book a on c.customers_id = a.customers_id 
and c.customers_default_address_id = a.address_book_id 
where c.customers_lastname like '%adolfs%' 
or c.customers_firstname like '%adolfs%' 
or c.customers_email_address like '%adolfs%' 
or a.entry_company like '%adolfs%' 
or c.customers_id = 'adolfs') 
group by c.customers_id 
order by c.customers_id DESC

应该可以

如何解决查询返回包含搜索词的大量数据的问题

1 个答案: