fix: update SQL Server barrier creation script (#85)

fix NOT use the dtm_barrier database when the DB exist and table does NOT exist

Author: wooln

sqls/barrier.sqlserver.sql

@@ -1,11 +1,13 @@
 IF NOT EXISTS(SELECT * FROM sys.databases WHERE name = 'dtm_barrier')
 BEGIN
    CREATE DATABASE dtm_barrier
-   USE dtm_barrier
 END
 
 GO
 
+USE dtm_barrier
+GO
+
 IF EXISTS (SELECT * FROM sysobjects WHERE id = object_id(N'[dbo].[barrier]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)  
 BEGIN
  DROP TABLE [dbo].[barrier]