clisp中的哈希表。哈希表中的哈希表

Question

http://imgur.com/u1I5OQJ

为什么哈希表返回nil.Doesn＆＃t;哈希表适用于列表。

Answer 1

默认哈希表使用`DECLARE @Org VARCHAR(50) DECLARE @UserName VARCHAR(50) DECLARE @StartDate DATETIME DECLARE @EndDate DATETIME DECLARE @FinalizedDate DateTime DECLARE @EventDate DateTime SET @org = ‘zzz’ SET @StartDate = '2014-08-29' SET @EndDate = '2014-09-30' Select A.*, EventDate, FinalizedDate, Org From ABC A WHERE Org = @Org AND (@EventDate BETWEEN @StartDate AND @EndDate AND @EventDate IS NOT NULL) or (@FinalizedDate BETWEEN @StartDate AND @EndDate AND @FinalizedDate IS NOT NULL) 进行密钥比较。您可以选择eql，eq，eql和equal。对于列表，您需要equalp或equal。在Hyperspec以及equalp中查找它们。