![Stress](http://static.forosdelweb.com/fdwtheme/images/smilies/stress.png)
SELECT case when Datepart(Month, T0.DocDate) = 1
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-01 ' WHEN Datepart(Month, T0.DocDate)= 2
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-02 ' WHEN Datepart(Month, T0.DocDate)= 3
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-03 ' WHEN Datepart(Month, T0.DocDate)= 4
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-04 ' WHEN Datepart(Month, T0.DocDate)= 5
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-05 ' WHEN Datepart(Month, T0.DocDate)= 6
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-06 ' WHEN Datepart(Month, T0.DocDate)= 7
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-07 ' WHEN Datepart(Month, T0.DocDate)= 8
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-08 ' WHEN Datepart(Month, T0.DocDate)= 9
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-09 ' WHEN Datepart(Month, T0.DocDate)= 10
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-10 ' WHEN Datepart(Month, T0.DocDate)= 11
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-11 ' WHEN Datepart(Month, T0.DocDate)= 12
THEN CAST(Datepart(year, T0.DocDate) AS varchar(30)) + '-12 ' ELSE 'bones' END AS 'Periodo',