From: michael@gurfinkel.us   
      
   I need to show list of employees along with their scheduled work hours for a   
   given date. If employee was not scheduled to work, then the hours should be   
   empty on his/her line.   
      
   Here is my setup (SQL 2008)   
   declare @EMPLOYEES	table (   
   	EMPL_ID		int		NOT NULL   
   ,	EMPL_NAME	varchar(64)   
   )   
   insert into @EMPLOYEES(EMPL_ID,EMPL_NAME) values   
   ( 100,	'JOHN'),   
   ( 200,	'BOB'),   
   ( 300,	'MARY');   
      
      
   declare @SCHEDULED	table (   
   	EMPL_ID		int		NOT NULL   
   ,	WORK_DATE	date	NOT NULL   
   ,	WORK_HOURS	int		NOT NULL   
   )   
   insert into @SCHEDULED(EMPL_ID, WORK_DATE, WORK_HOURS) values   
   ( 100,	'20150106',	8),   
   ( 100,	'20150107',	8),   
   ( 100,	'20150108',	8),   
   ( 200,	'20150107',	6);   
      
   So, I expect to get three records in my report regardless of the day specified.   
      
      
      
   This is my SQL statement:   
      
   select E.EMPL_ID, E.EMPL_NAME, S.WORK_DATE, S.WORK_HOURS   
   from	   
   		@EMPLOYEES E   
   left join	@SCHEDULED S	on E.EMPL_ID=S.EMPL_ID   
      
   where		S.WORK_DATE = '20150107' or S.EMPL_ID IS NULL;   
      
   It results in :   
      
   EMPL_ID	EMPL_NAME WORK_DATE WORK_HOURS   
   ======= ======= ========== =======   
   100	JOHN	2015-01-07	8   
   200	BOB	2015-01-07	6   
   300	MARY	NULL	NULL   
      
   Which is correct.   
      
   If I use 20150206, my result is:   
      
   100	JOHN	2015-01-06	8   
   300	MARY	NULL	NULL   
      
   So, I am missing record for BOB, as I would expect to se BOB with NULLS in the   
   report   
      
   If I use date of 20150131 I expect to get three lines with all hours being   
   NULLS, but my result is only one record:   
      
   300	MARY	NULL	NULL   
      
   Please help me with this situation, any ideas would be appreciated.   
      
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