Problem with a query in Postgres that I want to move to SQL Server - sql

Question

I have the following query in postgres that I now need to run on SQL Server. Obviously I have already changed the trunc per round and basic things, but mainly I have a problem in the principle select distinct on (c.cod_socio) tbl. * Since SQL Server does not recognize that syntax.
select distinct on (c.cod_socio)
tbl.*, h.cod_oficina, h.cod_transaccion, h.num_transaccion,
h.num_sec, h.fec_movimiento
from
sgf_det_mov_his h
inner join
sgf_cuenta c on c.cod_producto = h.cod_producto and c.cod_cuenta = h.cod_cuenta
inner join
sgf_tran t on t.cod_transaccion = h.cod_transaccion and t.cod_oficina = h.cod_oficina and t.cod_tipo_transaccion in ('DA', 'DP','NC')
inner join
(select
sgf_cuenta.cod_socio,
sum(trunc(sgf_det_mov_his.val_efectivo, 0) + trunc(sgf_det_mov_his.val_cheques, 0)) as total
from
sgf_det_mov_his, sgf_cuenta, sgf_tran
where
sgf_cuenta.cod_producto = sgf_det_mov_his.cod_producto
and sgf_cuenta.cod_cuenta = sgf_det_mov_his.cod_cuenta
and sgf_det_mov_his.sts_mov = 'A'
and sgf_tran.cod_transaccion = sgf_det_mov_his.cod_transaccion
and sgf_tran.cod_oficina = sgf_det_mov_his.cod_oficina
and sgf_cuenta.cod_producto <> 2
and sgf_tran.cod_tipo_transaccion in ('DA', 'DP','NC')
and isnull(sgf_tran.cod_uaf, 0) > 0
and isnull(sgf_tran.cod_uaf, 0) not in (71)
and sgf_cuenta.cod_cuenta not in (select cod_cuenta
from sgf_credito
where sgf_credito.cod_producto = sgf_cuenta.cod_producto
and sgf_credito.cod_cuenta = sgf_cuenta.cod_cuenta
and sts_operacion in ('A'))
and date(sgf_det_mov_his.fec_movimiento) between '2015-01-01' and '2019-01-01'
group by
sgf_cuenta.cod_socio
having
sum(trunc(sgf_det_mov_his.val_efectivo,0) + trunc(sgf_det_mov_his.val_cheques,0)) >= 5000) tbl on tbl.cod_socio = c.cod_socio
where
date(h.fec_movimiento) between '2015-01-01' and '2019-01-01'
order by
c.cod_socio, h.fec_movimiento desc

Answer 1

distinct on (...) simply retains the "first row" which may be emulated using row_number() over(...) and a following where clause predicate that limits to one row per partition.. Note that distinct on relies on the order by clause to decide the "first row", so you need the equivalent conditions in the over clause. Also note if you after greater query compatibility between the two databases you could use the same row_number approach in PostgreSQL.
SELECT
*
FROM (
SELECT
ROW_NUMBER() OVER (PARTITION BY c.cod_socio ORDER BY h.fec_movimiento DESC) AS rn
, c.cod_socio
, tbl.*
, h.cod_oficina
, h.cod_transaccion
, h.num_transaccion
, h.num_sec
, h.fec_movimiento
FROM sgf_det_mov_his h
INNER JOIN sgf_cuenta c ON c.cod_producto = h.cod_producto
AND c.cod_cuenta = h.cod_cuenta
INNER JOIN sgf_tran t ON t.cod_transaccion = h.cod_transaccion
AND t.cod_oficina = h.cod_oficina
AND t.cod_tipo_transaccion IN ('DA', 'DP', 'NC')
INNER JOIN (
SELECT
sgf_cuenta.cod_socio
, SUM(trunc(sgf_det_mov_his.val_efectivo, 0) + trunc(sgf_det_mov_his.val_cheques, 0)) AS total
FROM sgf_det_mov_his
, sgf_cuenta
, sgf_tran
WHERE sgf_cuenta.cod_producto = sgf_det_mov_his.cod_producto
AND sgf_cuenta.cod_cuenta = sgf_det_mov_his.cod_cuenta
AND sgf_det_mov_his.sts_mov = 'A'
AND sgf_tran.cod_transaccion = sgf_det_mov_his.cod_transaccion
AND sgf_tran.cod_oficina = sgf_det_mov_his.cod_oficina
AND sgf_cuenta.cod_producto <> 2
AND sgf_tran.cod_tipo_transaccion IN ('DA', 'DP', 'NC')
AND ISNULL(sgf_tran.cod_uaf, 0) > 0
AND ISNULL(sgf_tran.cod_uaf, 0) NOT IN (71)
AND sgf_cuenta.cod_cuenta NOT IN (
SELECT
cod_cuenta
FROM sgf_credito
WHERE sgf_credito.cod_producto = sgf_cuenta.cod_producto
AND sgf_credito.cod_cuenta = sgf_cuenta.cod_cuenta
AND sts_operacion IN ('A')
)
AND DATE(sgf_det_mov_his.fec_movimiento) BETWEEN '2015-01-01' AND '2019-01-01'
GROUP BY
sgf_cuenta.cod_socio
HAVING SUM(trunc(sgf_det_mov_his.val_efectivo, 0) + trunc(sgf_det_mov_his.val_cheques, 0)) >= 5000
) tbl ON tbl.cod_socio = c.cod_socio
WHERE DATE(h.fec_movimiento) BETWEEN '2015-01-01' AND '2019-01-01'
) AS d
WHERE d.rn = 1
ORDER BY
d.cod_socio
, d.fec_movimiento DESC