设置计算列时出现问题

Question

我正在尝试设置此col但我收到错误：

FirstName + (CASE WHEN LEN(FirstName + LastName) > 0 THEN ' ' ELSE '') + LastName

Answer 1

你应该用END关闭CASE，而且我认为以下值会更好：

FirstName + (CASE WHEN LEN(FirstName) > 0 AND LEN(LastName) > 0 THEN ' ' ELSE '' END) + LastName

Answer 2

FirstName + (CASE WHEN LEN(FirstName + LastName) > 0 THEN ' ' ELSE '' end) + LastName

错过了结束