SQL View: ORA Error

Question

I created a view in MS SQL. It worked perfectly. When I exported and imported my project into an Oracle environment, the view didn't work anymore. As far as I know, I used META SQL.

Hope someone can help!

SELECT OPRID 
 , DESCR1 
 , DESCR 
 , DESCR5 
 , DESCR6 
 , DESCR7 
 , YEAR 
 , WEEKOFYEAR 
 --When working more then 6 hours, subtract .5 hours break
 , CASE WHEN (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_MONDAY_START 
 , DG_MONDAY_END))/60) >= 6 THEN (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_MONDAY_START 
 , DG_MONDAY_END))/60 - 0.5) ELSE (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_MONDAY_START 
 , DG_MONDAY_END))/60) END AS 'MONDAY' 
 , CASE WHEN (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_TUESDAY_START 
 , DG_TUESDAY_END))/60) >= 6 THEN (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_TUESDAY_START 
 , DG_TUESDAY_END))/60 - 0.5) ELSE (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_TUESDAY_START 
 , DG_TUESDAY_END))/60) END AS 'TUESDAY' 
 , CASE WHEN (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_WEDNESDAY_START 
 , DG_WEDNESDAY_END))/60) >= 6 THEN (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_WEDNESDAY_START 
 , DG_WEDNESDAY_END))/60 - 0.5) ELSE (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_WEDNESDAY_START 
 , DG_WEDNESDAY_END))/60) END AS 'WEDNESDAY' 
 , CASE WHEN (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_THURSDAY_START 
 , DG_THURSDAY_END))/60) >= 6 THEN (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_THURSDAY_START 
 , DG_THURSDAY_END))/60 - 0.5) ELSE (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_THURSDAY_START 
 , DG_THURSDAY_END))/60) END AS 'THURSDAY' 
 , CASE WHEN(CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_FRIDAY_START 
 , DG_FRIDAY_END))/60) >= 6 THEN (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_FRIDAY_START 
 , DG_FRIDAY_END))/60 - 0.5) ELSE (CONVERT(DECIMAL(10,1) 
 , DATEDIFF(MINUTE 
 , DG_FRIDAY_START 
 , DG_FRIDAY_END))/60) END AS 'FRIDAY' 
 , '0' AS 'TOTAL' 
 --Total will be calculated in PeopleCode
  FROM PS_DG_BPV_ROSTER 
 WHERE YEAR LIKE YEAR(TO_DATE(TO_CHAR(SYSDATE,'YYYY-MM-DD'),'YYYY-MM-DD')) 
   AND (DG_MONDAY_START != DG_MONDAY_END 
    OR DG_TUESDAY_START != DG_TUESDAY_END 
    OR DG_WEDNESDAY_START != DG_WEDNESDAY_END 
    OR DG_THURSDAY_START != DG_THURSDAY_END 
    OR DG_FRIDAY_START != DG_FRIDAY_END)

Answer 1

In your query, you use CONVERT command but in Oracle you must use CAST.

The type DECIMAL must be changed with NUMBER type as follow.

Instead of:

CONVERT(DECIMAL(10,1), field)

Use:

CAST(field as NUMBER(10,1))

Tell me if it's OK

EDIT After comment

In Oracle the Sql Server function DATEDIFF has been replaced with - sign, as a normal difference between two DATA field.

I advice you this site where you'll find the equivalent function between Oracle 10g and Sql Server 2008R2