PRINT Convert(VarChar(Max),Replicate('1234567890 ',1000))
返回窗口7,997个字符。
SELECT Convert(VarChar(Max),Replicate('1234567890 ',1000))
这将返回网格7,996个字符。打印窗口中的额外字符是CRLF。我有这样的选择： 工具→选项→查询结果→结果到文本→每列中显示的最大字符数= 8192
所以，我希望在网格中返回8,192个字符，我希望将11,001个字符返回到我的窗口。
然后进行了这个测试：
DECLARE @VarCharMax VarChar(Max)
SET @VarCharMax = Replicate('123456',2000)
SELECT Right(@VarCharMax,3) -- returns 456
SELECT Right(Left(@VarCharMax,8000),3) -- returns 456
SELECT Right(Left(@VarCharMax,7999),3) -- returns 456
SELECT Right(Left(@VarCharMax,7998),3) -- returns 456
SELECT Right(Left(@VarCharMax,7997),3) -- returns 345
SELECT Right(Left(@VarCharMax,7996),3) -- returns 234
我在这里理解的是什么？它似乎没有像我期望的那样表现出来？
答案 0 :(得分：4)
8000个字符是复制函数的限制，除非参数的类型为varchar（max）/ nvarchar（max）
https://msdn.microsoft.com/en-us/library/ms174383.aspx
如果string_expression的类型不是varchar（max）或nvarchar（max），则REPLICATE会将返回值截断为8,000字节。要返回大于8,000字节的值，必须将string_expression显式转换为适当的大值数据类型。
答案 1 :(得分：2)
SELECT len(Replicate(cast('1234567890' as varchar(max)),1000))
Returns 10000
答案 2 :(得分：1)
你的＆＃39; 123456＆＃39;复制函数内的文本不是varchar（max）数据类型。正如Dudu所说，如果表达式不是varchar（max）数据类型，则复制函数作为8000个字符的限制。
答案 3 :(得分：0)
杜杜清楚地解释了这一点。字符串下面是9,060个字符。
DECLARE @VarCharMax VarChar(Max)
SET @VarCharMax = 'This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!This is a test!'
PRINT Right(@VarCharMax,3) -- returns st!
PRINT Right(Left(@VarCharMax,8000),3) -- returns is
PRINT Right(Left(@VarCharMax,7999),3) -- returns his
PRINT Right(Left(@VarCharMax,7998),3) -- returns Thi
PRINT Right(Left(@VarCharMax,7997),3) -- returns !Th
PRINT Right(Left(@VarCharMax,7996),3) -- returns t!h
这会像我期望的那样回归。