MSSQL – CASE WHEN IN WHERE
select * from tbl_events_dates where 1 = ( CASE WHEN tbl_events_dates.dateStart < CAST(cast(year(GETDATE()) as varchar)+'-09-01' AS datetime) THEN CASE WHEN tbl_events_dates.dateStart >= CAST(cast(year(DATEADD(year,-1,GETDATE())) as varchar)+'-09-01' AS datetime) and tbl_events_dates.dateStart <CAST(cast(year(GETDATE()) as varchar)+'-09-01' AS datetime) THEN 1 else 0 end ELSE CASE WHEN tbl_events_dates.dateStart <=CAST(cast(year(GETDATE()) as varchar)+'-09-01' AS datetime) and tbl_events_dates.dateStart >= CAST(cast(year(DATEADD(year,1,GETDATE())) as varchar)+'-09-01' AS datetime) THEN 1 else 0 end END )