Question

SQL Server 2012: how to display the @Var result inside a Case statement with literals before and after the @Var?

A simple query:

Declare @Var1 ...    
Declare @Var2....     

Select ....    
  CASE
     WHEN ...........    
      THEN 'Display this sentence ' + @Var1 +'followed by there words'    
      ELSE 'Display these other words  '  +@Var2  'followed by these other words'    
  END

The error message is

'Display this sentence' is not a declared variable.

I know it isn't! It should be a literal statement, only with the @Var1 result inside the literal statement.

What am I missing?

Answer 1

There's nothing wrong the way you do the concatenation, i think the error is in the logic, do you have IF ELSE condition ? , maybe the error you encountered is on the two variables @var1 or @var2 , the reason why Display this sentence is not a declared variable is because that is the part of concatenation with the variables.

Tips:

• Make sure that the declared variables @var1 and @var2 are inside the BEGIN and END of the condition, meaning the program reads your declaration before the CASE WHEN logic is being read.

• If you are not sure with the logic, just declare your 2 variables at the top of the script to make sure that it is being read/declared.