Aliasing in SQL Server - sql-server

Question

I wrote this query in Oracle and want to compile it as well on SQL Server:
SELECT DISTINCT
HOLDER_CODE, CALCULATED_AMOUNT
FROM
(SELECT
DA.HOLDER_CODE,
ROUND(FAB.AMOUNT * FCE.EXCHANGE_RATE,0) AS CALCULATED_AMOUNT,
FAB.BALANCE_DATE_ID as FAB_DATE,
MAX(FAB.BALANCE_DATE_ID) OVER (PARTITION BY DA.HOLDER_CODE) as MAX_DATE_BALANCE
FROM
DIM_ACCOUNT DA
JOIN
FACT_AS_BALANCE FAB ON FAB.ACCOUNT_ID = DA.ID
JOIN
DIM_AS_CHARACTERISTICS DAC ON DAC.ID = FAB.BALANCE_TYPE_ID
LEFT JOIN
FACT_CURRENCY_EXCHANGE FCE ON FCE.FROM_CURRENCY_ID = FAB.CURRENCY_ID
WHERE
DAC.BALANCE_CLOSING_FLAG = 'Y'
AND TO_CURRENCY_ID = (SELECT DC.ID
FROM DIM_CURRENCY DC
WHERE DC.IS_DEFAULT_CURRENCY = 'Y')
AND FAB.AMOUNT > 0)
WHERE
FAB_DATE = MAX_DATE_BALANCE
ORDER BY
CALCULATED_AMOUNT DESC;
But when I run it I get the following exception:
Error: Incorrect syntax near the keyword 'WHERE'. SQLState: S0001
ErrorCode: 156
So I guess, it's the last where clause, which indicates this. What is wrong and what should it be?

Answer 1

You just need to alias the subquery
SELECT DISTINCT HOLDER_CODE, CALCULATED_AMOUNT
FROM (
SELECT DA.HOLDER_CODE,
//// snip subquery
AND FAB.AMOUNT > 0
) alias_name_here //<--- here
WHERE FAB_DATE = MAX_DATE_BALANCE
ORDER BY CALCULATED_AMOUNT DESC;
You can use as alias_name_here or just alias_name_here - SQL Server allows either syntax.

Answer 2

you must give a name at your "table"
i give is with "as T"
SELECT DISTINCT HOLDER_CODE, CALCULATED_AMOUNT
FROM (
SELECT DA.HOLDER_CODE,
ROUND(FAB.AMOUNT * FCE.EXCHANGE_RATE,0) AS CALCULATED_AMOUNT,
FAB.BALANCE_DATE_ID as FAB_DATE,
MAX(FAB.BALANCE_DATE_ID) OVER (PARTITION BY DA.HOLDER_CODE) as MAX_DATE_BALANCE
FROM DIM_ACCOUNT DA
JOIN FACT_AS_BALANCE FAB ON FAB.ACCOUNT_ID = DA.ID
JOIN DIM_AS_CHARACTERISTICS DAC ON DAC.ID = FAB.BALANCE_TYPE_ID
LEFT JOIN FACT_CURRENCY_EXCHANGE FCE ON FCE.FROM_CURRENCY_ID = FAB.CURRENCY_ID
WHERE DAC.BALANCE_CLOSING_FLAG = 'Y'
AND TO_CURRENCY_ID = (
SELECT DC.ID FROM DIM_CURRENCY DC
WHERE DC.IS_DEFAULT_CURRENCY = 'Y')
AND FAB.AMOUNT > 0
) as T
WHERE FAB_DATE = MAX_DATE_BALANCE
ORDER BY CALCULATED_AMOUNT DESC;