in if else Loop ,cannot drop the same temp table - sql-server-2008-r2

Question

i am using if else statement and ,i want to drop the temporary table which is created out side the inner if statement , but when i execute the statement , i get the answer as , There is already an object named '#table' in the database. ---------------------MY CODE IS LIKE enter code here
DECLARE #RowCount INT;
SET #RowCount = 1;
IF #RowCount = 1
BEGIN
IF OBJECT_ID('tempdb..#Guarantor_Details') IS NOT NULL
DROP TABLE #Guarantor_Details
SELECT DISTINCT TOP 1 GUARANTORS.GUARANTOR_CODE
INTO #Guarantor_Details
FROM GUARANTORS
WHERE ISNULL(GUARANTORS.deleted, 0) <> 1;
DECLARE #GuarantorCount INT;
SELECT #GuarantorCount = count(*)
FROM #Guarantor_Details;
IF (#GuarantorCount = 0)
DROP TABLE #Guarantor_Details
BEGIN
IF OBJECT_ID('tempdb..#Guarantor_Details') IS NOT NULL
SELECT TOP 1 CLIENT.Last_Name
INTO #Guarantor_Details
FROM CLIENT
LEFT JOIN GUARANTORS ON GUARANTORS.GUARANTOR_CODE = CLIENT.Financial_Guarantor
END
END
------------------------------------------------------------------------

Answer 1

You don't need to do this type of CREATE / DROP. You can (and probably should) create the table before the loop and simply either TRUNCATE TABLE or DELETE FROM the temp table when necessary to "reset" it. Just pick a datatype that fits both GUARANTOR_CODE and Last_Name.
You also don't need to do a SELECT COUNT(*) on the table when you have the ##ROWCOUNT from the INSERT operation that already has that value in it.
Essentially:
CREATE TABLE #Guarantor_Details (Value NVARCHAR(50));
WHILE (something)
BEGIN
IF (#RowCount = 1)
BEGIN
TRUNCATE TABLE #Guarantor_Details;
INSERT INTO #Guarantor_Details (Value)
SELECT DISTINCT TOP 1 GUARANTORS.GUARANTOR_CODE
FROM GUARANTORS
WHERE ISNULL(GUARANTORS.deleted, 0) <> 1;
IF (##ROWCOUNT = 0)
BEGIN
INSERT INTO #Guarantor_Details (Value)
SELECT TOP 1 CLIENT.Last_Name
FROM CLIENT
LEFT JOIN GUARANTORS
ON GUARANTORS.GUARANTOR_CODE = CLIENT.Financial_Guarantor;
END;
END;
FYI, there appear to be some logic problems in the original code:
There are BEGIN / END tags at the bottom of the IF #RowCount = 1 block that aren't associated to any IF or WHILE. This is technically ok, but usually implies something is missing.
If this code is all of the code, then the IF #RowCount = 1 doesn't work in the loop unless something sets #RowCount past the end of this outer IF block that is not shown here in the question.