T-SQL 结果不足 space 无法将 uniqueidentifier 值转换为 char
T-SQL Insufficient result space to convert uniqueidentifier value to char
我该如何解决这个错误？
代码
declare @guid uniqueidentifier = '4164980A-EFD0-4C60-A18A-253465E00E9C'
print 'GUID ='+cast(@guid as varchar)
结果
Msg 8170, Level 16, State 2, Line 2
Insufficient result space to convert uniqueidentifier value to char.
您需要为 varchar 变量指定字符串长度，否则默认长度将为 30（长度不足以包含您的值），根据 Microsoft 文档 here：
varchar [ ( n | max ) ] Variable-length, non-Unicode string data. n defines the string length and can be a value from 1 through 8,000.
When n is not specified when using the CAST and CONVERT functions, the default length is 30.
所以以下应该可以解决您的问题：
declare @guid uniqueidentifier = '4164980A-EFD0-4C60-A18A-253465E00E9C'
print 'GUID ='+cast(@guid as varchar(36))
我该如何解决这个错误？
代码
declare @guid uniqueidentifier = '4164980A-EFD0-4C60-A18A-253465E00E9C'
print 'GUID ='+cast(@guid as varchar)
结果
Msg 8170, Level 16, State 2, Line 2
Insufficient result space to convert uniqueidentifier value to char.
您需要为 varchar 变量指定字符串长度，否则默认长度将为 30（长度不足以包含您的值），根据 Microsoft 文档 here：
varchar [ ( n | max ) ] Variable-length, non-Unicode string data. n defines the string length and can be a value from 1 through 8,000.
When n is not specified when using the CAST and CONVERT functions, the default length is 30.
所以以下应该可以解决您的问题：
declare @guid uniqueidentifier = '4164980A-EFD0-4C60-A18A-253465E00E9C'
print 'GUID ='+cast(@guid as varchar(36))