Sql server Varbinary在where子句中工作不正确

我有一个select查询，它给出了输出“0x38F0A2D294A4AEBD1648C952D910AC51C40FE7”

即使知道SQL server是做什么的，我也无法将列与值进行比较。我正在这样做：

SELECT 'Worked!'
WHERE  HASHBYTES ('SHA1',CAST(54 AS varchar)+CAST(1 AS varchar)+
CAST('2013-07-26 16:30:49.9786317' AS varchar)+CAST(1 AS varchar))=0x38F0A2D294A4AEBD1648C952D910AC51C40FE7

这根本不起作用。奇怪的是，当值不同时，它适用于其他情况。

尝试以下方法：

declare @Hashthis nvarchar(2000)
SELECT @Hashthis=HASHBYTES ('SHA1',CAST(54 AS varchar)+CAST(1 AS varchar)
+CAST('2013-07-26 16:30:49.9786317' AS varchar)+CAST(1 AS varchar))

SELECT 'Worked' where HASHBYTES ('SHA1',CAST(54 AS varchar)+CAST(1 AS varchar)
+CAST('2013-07-26 16:30:49.9786317' AS varchar)+CAST(1 AS varchar))=@Hashthis

---

这真的很有效。但是有人能告诉我为什么它不起作用？这样就不会有性能问题了？不是对你问题的回答，而是。

declare @Hashthis nvarchar(2000)
SELECT @Hashthis=HASHBYTES ('SHA1',CAST(54 AS varchar)+CAST(1 AS varchar)
+CAST('2013-07-26 16:30:49.9786317' AS varchar)+CAST(1 AS varchar))

SELECT 'Worked' where HASHBYTES ('SHA1',CAST(54 AS varchar)+CAST(1 AS varchar)
+CAST('2013-07-26 16:30:49.9786317' AS varchar)+CAST(1 AS varchar))=@Hashthis