在搜索结果中进行多次搜查,同时使用该届会议所用的所有搜索术语。
例如,我有一个表格<编码>User(UserId,userName,userAddress,userCity)。
我试图做的是,我想搜索表格中的所有栏目,例如使用用户名称(这可能会给我一个包含1个以上结果的结果)。 我想能够在再次使用新搜索词(不一定需要在搜索场拥有第一搜索期)的结果范围内进行搜索,但这次必须在第1次搜索结果组内进行搜索。 这可能会打破既定结果,直到找到所需条件。
如果我可能非常混淆我的要求,我会感到担忧。 我曾尝试过,现在还没有开始。 我尝试通过这个网站进行浏览和浏览,但可以发现我确实试图找到的东西。
I want to be able to search within the result-set again using a new search term [...], but this time, it must search within the result set of the 1st search .This might go on breaking down the result-set until what is required is found.
It seems to me that you have not yet understood that SQL is a declarative language, not an imperative one. And yes, there are stored procedures, but these are a procedural extension to SQL and don t alter the fact that SQL is essentially declarative.
因此,在“<>......m>确定结果之前,你不再“”,而是一劳永逸地说明所有标准,最好不采用储存程序,直到你理解非程序。
举例来说,使用多个WHERE条款中规定的预期结果的说明)可能照此办理:
SELECT UserId FROM User
WHERE UserName LIKE cook%
AND UserAddress LIKE sesam%
AND UserCity = Hamburg ;
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