transform sql query to oracle - sql

Question

i have to transform some query i´m using in SQL to Oracle code. I´m having a lot of trouble with tis. Does anyone know any Query transformer o something like that?. Can someone translate some part of this code for me?.
This is the code:
SELECT PRUEBA = CASE (SELECT TIMEATT FROM READER WHERE PANELID = DEVID AND READERID =
MACHINE) WHEN '1' THEN 'P10' ELSE 'P20' END
+ '0001'
+ CAST(YEAR(EVENT_TIME_UTC)AS VARCHAR)
+ Right('0' + Convert(VarChar(2), Month(EVENT_TIME_UTC)), 2)
+ Right('0' + Convert(VarChar(2), DAY(EVENT_TIME_UTC)), 2)
+ Right('0' + Convert(VarChar(2), DATEPART(HOUR,EVENT_TIME_UTC)), 2)
+ Right('0' + Convert(VarChar(2), DATEPART(MINUTE,EVENT_TIME_UTC)), 2)
+ Right('0' + Convert(VarChar(2), DATEPART(SECOND,EVENT_TIME_UTC)), 2)
+ CAST(YEAR(EVENT_TIME_UTC)AS VARCHAR)
+ Right('0' + Convert(VarChar(2), Month(EVENT_TIME_UTC)), 2)
+ Right('0' + Convert(VarChar(2), DAY(EVENT_TIME_UTC)), 2)
+ Right('0' + Convert(VarChar(2), DATEPART(HOUR,EVENT_TIME_UTC)), 2)
+ Right('0' + Convert(VarChar(2), DATEPART(MINUTE,EVENT_TIME_UTC)), 2)
+ Right('0' + Convert(VarChar(2), DATEPART(SECOND,EVENT_TIME_UTC)), 2)
+ Right('00000000' + Convert(VarChar(8), CARDNUM), 8)
+ Right('00000000' + Convert(VarChar(8), (SELECT SSNO FROM EMP WHERE ID = EMPID)), 8),
FROM events
WHERE eventid = 0 AND eventid = 0
and machine in (11) AND DEVID IN (1,2)
and CARDNUM <> 0 AND EMPID <> 0
and EVENT_TIME_UTC between '2006-02-16' AND '2007-02-09'
Many thanks for your help, i´ll keep looking.

Answer 1

Try this:
SELECT CASE (SELECT timeatt FROM reader WHERE panelid = devid AND readerid =
machine)
WHEN '1' THEN 'P10'
ELSE 'P20'
END
|| '0001'
|| To_char(event_time_utc, 'RRRRMMDDHH24MISS')
|| To_char(event_time_utc, 'RRRRMMDDHH24MISS')
|| Lpad(cardnum, 8, '0')
|| Lpad((SELECT ssno
FROM emp
WHERE id = empid), 8, '0') AS prueba
FROM events
WHERE eventid = 0
AND eventid = 0
AND machine IN ( 11 )
AND devid IN ( 1, 2 )
AND cardnum <> 0
AND empid <> 0
AND event_time_utc BETWEEN TO_DATE('2006-02-16', 'RRRR-MM-DD') AND TO_DATE('2007-02-09', 'RRRR-MM-DD')

Answer 2

I have recently had to make the same conversion from a life in tSQL to plSQL (oracle). A couple of "gotcha's" in the code you posted:
1) In tSQL the plus sign (for concatenation)+ is replaced in plSQL with double pipe ||
2) Most of the time you need a "Reference Cursor" (REF CURSOR) declared to put your results into like
PROCEDURE DEMO_SELECT_4_SO(
//other parameters followed by//
P_RESULT OUT REF CURSOR)
IS
BEGIN
OPEN P_RESULT FOR
SELECT
//fields///
FROM
a_table
WHERE
//you want..//
OR (as with a scalar result like your query) a single parameter of the correct type, like:
PROCEDURE DEMO_SELECT_4_SO(
//other parameters followed by//
P_RESULT OUT varchar2(60))
IS
BEGIN
SELECT
//concatenated fields///
INTO
P_RESULT
FROM
a_table
WHERE
//you want..//
NOTICE That select into in plSQL assigns the selected value to the target parameter and does not create a table as it would in tSQL
3) RIGHT (or LEFT) are SUBSTR functions in plSQL
I have found a lot of utility out of this link http://www.techonthenet.com/oracle/index.php for clear explanations of plSQL.