How to fix the error "multipart identifier could not be found"

Question

This is my code. Please let me know how to fix this.
DECLARE @DATEPROCESS DATETIME;
DECLARE @TODAYDATE DATETIME;
DECLARE @PARAMORG VARCHAR(50);
DECLARE @BATCHSIZE INT;
SET @PARAMORG='USA';
SET @DATEPROCESS = CAST(DATEADD(D, -((DATEPART(WEEKDAY, GETDATE()) + 1 + @@DATEFIRST) % 7), GETDATE()) AS DATE)
SET @TODAYDATE=CAST(GETDATE() AS DATE)
SET @BATCHSIZE = 2000
Select
FFC.[DSSI Item #] as PART,
REPLACE(REPLACE(FFC.[Splr Name],'&','-'), '''', '') as SPLRNAME,
@PARAMORG as ORG,
FFC.[REPLACEMENT ITEM#] as REPITEM,
FFC.[NEEDS RFQ?] RFQ,
FFC.[BUY INCREMENT] INCR,
FFC.[PRICE GOOD THRU DATE] GDATE,
CASE 
WHEN FFC.[ACTIVE INACTIVE FLAG] = 'A' THEN '-' 
WHEN FFC.[ACTIVE INACTIVE FLAG] = 'D' THEN '+' 
END as FLAG,
1 as UPD  into #TEMPJOIN
FROM R5PARTS RP JOIN FRI_FULL_CATALOG FFC  ON RP.PAR_UDFCHAR06 = FFC.[DSSI Item #]
WHERE RP.PAR_ORG=@PARAMORG AND FFC.FRI_CREATED=@DATEPROCESS 
WHILE @BATCHSIZE <> 0
BEGIN
   UPDATE  TOP (@BATCHSIZE) RP
SET
RP.PAR_PREFSUP= TJ.SPLRNAME,
RP.PAR_PREFSUP_ORG=TJ.ORG,
RP.PAR_UDFCHAR05 = TJ.REPITEM,
RP.PAR_UDFCHAR09 = TJ.RFQ,
RP.PAR_UDFNUM01 = TJ.INCR,
RP.PAR_UDFDATE01= TJ.GDATE,
RP.PAR_UDFCHKBOX01 = TJ.FLAG,
TJ.UPD=0
FROM R5PARTS RP JOIN #TEMPJOIN TJ  ON RP.PAR_UDFCHAR06 = TJ.PART and TJ.UPD='1'
  SET @BATCHSIZE = @@ROWCOUNT
END  

Answer 1

Hi Balamurugan,
To update multiple tables, you need to use individual update statements. Please see below pseudo-code.
UPDATE T1
SET T1.col='col'
FROM
T1 JOIN T2 ON T1.ID=T2.ID
WHERE ...
UPDATE T2
SET T2.col='col'
FROM T1 JOIN T2 ON T1.ID = T2.ID
WHERE ..
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