这是我的查询
SELECT PHMR_ID,
NVOL_MVT_COD,
TO_CHAR(DATE_PREVUE, 'DD/MM/YYYY') AS DATE_PREVUE,
TO_CHAR(DATE_ORIGINE_LT, 'DD/MM/YYYY') AS DATE_ORIGINE_LT,
HTAD,
DHC_AFF,
PKG,
PKG_GEO,
GATE,
TTB,
BQE,
SALLE,
ESCALE,
TA_CLE,
IM_IMMAT,
VOL_NB_PAX_GLOB,
VOL_CRIT_DOUANIER,
VOL_PROTOCOLE,
VOL_CORRESP,
VOL_ETAT_VOL,
NVL(TAS_GLOB, TER_COD1) AS TAS_GLOB,
NVL(TER_TRAITEMENT, NVL(TAS_GLOB, TER_COD1)) AS TER_TRAITEMENT,
NUM_SIEGE,
VOL_ROT,
INFO_SUP,
TYPE_PREMIER_MSG,
PREMIER_MSG,
TYPE_DERNIER_MSG,
DERNIER_MSG,
TYP_JOUR,
PHMR_ID_ARP,
DECODE(NVOL_MVT_COD,'A',PHMR_ID_ARP,NULL) AS ID_ARP_A,
DECODE(NVOL_MVT_COD,'D',PHMR_ID_ARP,NULL) AS ID_ARP_D,
TYP_HORAIRE,
DUREE_CORRESP,
HOTEL,
TYPE_CONTACT,
RET_COD1,
RET_LIB1,
RET_COD2,
RET_LIB2,
HBLOC,
DISTINCT_LOT_CORRESPONDANCE,
OTHER_TYPE_MR,
TYPE_CHAISE,
STATUS_PHMR,
LISTE_MSG,
LIEU_RDV,
CLASSE,
PHMR_PRESTA_ID,
PRESTA,
DECODE(HORS_DELAI,1,'OUI','NON') AS HORSDELAI
FROM VW_PHMR
WHERE VW_PHMR.DATE_PREVUE >= to_date('06/07/2015','DD/MM/YYYY')
AND VW_PHMR.DATE_PREVUE <= to_date('06/07/2015','DD/MM/YYYY')
AND (phmr_valide IS NULL
OR phmr_valide ='O')
ORDER BY VW_PHMR.DATE_PREVUE ASC,
DHC ASC,
PHMR_ID ASC
我只需要获得不同的PHMR_ID（此列上只有disticnt），我该怎么做？
要清楚;我有一个观点：
CREATE OR REPLACE FORCE VIEW VW_PHMR
(
PHMR_ID,
TER_COD1,
PHMR_NOM,
PHMR_PRENOM,
TYPE_MR,
CIE_SARIA,
CIE_COD_IATA,
CIE_COD_OACI,
NVOL_LIG_NUM,
NVOL_MVT_COD,
DATE_PREVUE,
DATE_ORIGINE_LT,
DHC,
HTAD,
DHC_AFF,
PKG,
PKG_GEO,
GATE,
TTB,
BQE,
SALLE,
ESCALE,
TA_CLE,
IM_IMMAT,
VOL_NB_PAX_GLOB,
VOL_CRIT_DOUANIER,
VOL_PROTOCOLE,
VOL_CORRESP,
VOL_ETAT_VOL,
TAS_GLOB,
TER_TRAITEMENT,
NUM_SIEGE,
VOL_ROT,
INFO_SUP,
PREMIER_MSG,
TYPE_PREMIER_MSG,
DERNIER_MSG,
TYPE_DERNIER_MSG,
TYP_JOUR,
PHMR_ID_ADP,
TYP_HORAIRE,
DUREE_CORRESP,
HOTEL,
TYPE_CONTACT,
RET_COD1,
RET_LIB1,
RET_COD2,
RET_LIB2,
HBLOC,
DISTINCT_LOT_CORRESPONDANCE,
OTHER_TYPE_MR,
TYPE_CHAISE,
STATUS_PHMR,
ID_STATUS,
LISTE_MSG,
LIEU_RDV,
CLASSE,
PHMR_VALIDE,
PHMR_PRESTA_ID,
PRESTA,
HORS_DELAI
)
AS
SELECT DISTINCT
p.phmr_id,
p.ter_cod1,
p.phmr_nom,
p.phmr_prenom,
p.liste_mr AS type_mr,
p.cie_cle AS cie_saria,
c.cie_cod_iata,
c.cie_cod_oaci,
p.nvol_lig_num,
p.nvol_mvt_cod,
p.date_exp AS date_prevue,
p.vol_dt AS date_origine_lt,
v.dhc AS DHC,
TO_CHAR (v.HTAD, 'HH24:MI') AS HTAD,
DECODE (
v.vol_hadb,
NULL, v.DHC_TYP || TO_CHAR (v.dhc, 'HH24:MI'),
DECODE (v.dhc_typ, 'N', 'D', v.dhc_typ)
|| TO_CHAR (v.vol_hadb, 'HH24:MI'))
AS DHC_AFF,
v.parking AS PKG,
v.pkg_geo AS PKG_GEO,
v.porte AS GATE,
v.tapis AS TTB,
v.banque AS BQE,
v.salle AS SALLE,
v.escale AS ESCALE,
v.ta_cle,
v.im_immat,
v.vol_nb_pax_glob,
v.vol_crit_douanier,
v.protocole AS VOL_PROTOCOLE,
p.vol_corresp,
v.vol_etat_vol,
v.tas_glob,
v.tas_af_pax AS TER_TRAITEMENT,
p.num_siege,
v2.cie_cle || v2.nvol_lig_num AS vol_rot,
p.INFO_SUP AS INFO_SUP,
TO_CHAR (p.DH_PREMIER_MSG, 'DD/MM/YYYY HH24:MI') AS premier_msg,
tm.typmes_cod AS type_premier_msg,
TO_CHAR (p.DH_DERNIER_MSG, 'DD/MM/YYYY HH24:MI') AS dernier_msg,
tm2.typmes_cod AS type_dernier_msg,
DECODE (p.TYP_JOUR, NULL, 'S', p.TYP_JOUR),
p.PHMR_ID_ADP,
DECODE (p.TYP_HORAIRE, NULL, 'J', p.TYP_HORAIRE),
p.DUREE_CORRESP,
p.HOTEL,
v.TYPE_CONTACT,
v.RET_COD1,
v.RET_LIB1,
v.RET_COD2,
v.RET_LIB2,
v.vol_hadb,
p.DISTINCT_LOT_CORRESPONDANCE,
p.TYPE_MR,
P.TYPE_CHAISE,
sp.status_lib_court AS STATUS_PHMR,
sp.PHMR_STATUS AS ID_STATUS,
p.liste_message AS liste_msg,
p.phmr_lieupc AS lieu_rdv,
p.phmr_classe AS classe,
p.phmr_valide AS phmr_valide,
p.phmr_presta_id,
p.presta,
p.HORS_DELAI
FROM phmr p,
cie c,
vw_vols v,
vw_vols v2,
type_messages tm,
type_messages tm2,
status_phmr sp
WHERE c.cie_cle(+) = p.cie_cle
AND v.vol_ident(+) = p.vol_ident
AND v2.vol_ident(+) = v.vol_ident_rot
AND tm.msg_typ(+) = p.TYP_PREMIER_MSG
AND tm2.msg_typ(+) = p.TYP_DERNIER_MSG
AND sp.phmr_status(+) = p.phmr_status;
当我在此视图上执行此命令时，我有1904行
现在，我需要有一个左连接来获取另一列（我必须总是1904行），所以我修改我的视图CREATE OR REPLACE FORCE VIEW VW_PHMR
(
PHMR_ID,
TER_COD1,
PHMR_NOM,
PHMR_PRENOM,
TYPE_MR,
CIE_SARIA,
CIE_COD_IATA,
CIE_COD_OACI,
NVOL_LIG_NUM,
NVOL_MVT_COD,
DATE_PREVUE,
DATE_ORIGINE_LT,
DHC,
HTAD,
DHC_AFF,
PKG,
PKG_GEO,
GATE,
TTB,
BQE,
SALLE,
ESCALE,
TA_CLE,
IM_IMMAT,
VOL_NB_PAX_GLOB,
VOL_CRIT_DOUANIER,
VOL_PROTOCOLE,
VOL_CORRESP,
VOL_ETAT_VOL,
TAS_GLOB,
TER_TRAITEMENT,
NUM_SIEGE,
VOL_ROT,
INFO_SUP,
PREMIER_MSG,
TYPE_PREMIER_MSG,
DERNIER_MSG,
TYPE_DERNIER_MSG,
TYP_JOUR,
PHMR_ID_ADP,
TYP_HORAIRE,
DUREE_CORRESP,
HOTEL,
TYPE_CONTACT,
RET_COD1,
RET_LIB1,
RET_COD2,
RET_LIB2,
HBLOC,
DISTINCT_LOT_CORRESPONDANCE,
OTHER_TYPE_MR,
TYPE_CHAISE,
DERNIER_JALON,
STATUS_PHMR,
ID_STATUS,
LISTE_MSG,
LIEU_RDV,
CLASSE,
PHMR_VALIDE,
PHMR_PRESTA_ID,
PRESTA,
HORS_DELAI
)
AS
SELECT DISTINCT
p.phmr_id,
p.ter_cod1,
p.phmr_nom,
p.phmr_prenom,
p.liste_mr AS type_mr,
p.cie_cle AS cie_saria,
c.cie_cod_iata,
c.cie_cod_oaci,
p.nvol_lig_num,
p.nvol_mvt_cod,
p.date_exp AS date_prevue,
p.vol_dt AS date_origine_lt,
v.dhc AS DHC,
TO_CHAR (v.HTAD, 'HH24:MI') AS HTAD,
DECODE (
v.vol_hadb,
NULL, v.DHC_TYP || TO_CHAR (v.dhc, 'HH24:MI'),
DECODE (v.dhc_typ, 'N', 'D', v.dhc_typ)
|| TO_CHAR (v.vol_hadb, 'HH24:MI'))
AS DHC_AFF,
v.parking AS PKG,
v.pkg_geo AS PKG_GEO,
v.porte AS GATE,
v.tapis AS TTB,
v.banque AS BQE,
v.salle AS SALLE,
v.escale AS ESCALE,
v.ta_cle,
v.im_immat,
v.vol_nb_pax_glob,
v.vol_crit_douanier,
v.protocole AS VOL_PROTOCOLE,
p.vol_corresp,
v.vol_etat_vol,
v.tas_glob,
v.tas_af_pax AS TER_TRAITEMENT,
p.num_siege,
v2.cie_cle || v2.nvol_lig_num AS vol_rot,
p.INFO_SUP AS INFO_SUP,
TO_CHAR (p.DH_PREMIER_MSG, 'DD/MM/YYYY HH24:MI') AS premier_msg,
tm.typmes_cod AS type_premier_msg,
TO_CHAR (p.DH_DERNIER_MSG, 'DD/MM/YYYY HH24:MI') AS dernier_msg,
tm2.typmes_cod AS type_dernier_msg,
DECODE (p.TYP_JOUR, NULL, 'S', p.TYP_JOUR),
p.PHMR_ID_ADP,
DECODE (p.TYP_HORAIRE, NULL, 'J', p.TYP_HORAIRE),
p.DUREE_CORRESP,
p.HOTEL,
v.TYPE_CONTACT,
v.RET_COD1,
v.RET_LIB1,
v.RET_COD2,
v.RET_LIB2,
v.vol_hadb,
p.DISTINCT_LOT_CORRESPONDANCE,
p.TYPE_MR,
P.TYPE_CHAISE,
**p2.TYP_DERNIER_JALON AS DERNIER_JALON**,
sp.status_lib_court AS STATUS_PHMR,
sp.PHMR_STATUS AS ID_STATUS,
p.liste_message AS liste_msg,
p.phmr_lieupc AS lieu_rdv,
p.phmr_classe AS classe,
p.phmr_valide AS phmr_valide,
p.phmr_presta_id,
p.presta,
p.HORS_DELAI
FROM phmr p,
**phmr_presta p2**,
cie c,
vw_vols v,
vw_vols v2,
type_messages tm,
type_messages tm2,
status_phmr sp
WHERE c.cie_cle(+) = p.cie_cle
AND v.vol_ident(+) = p.vol_ident
AND v2.vol_ident(+) = v.vol_ident_rot
AND tm.msg_typ(+) = p.TYP_PREMIER_MSG
AND tm2.msg_typ(+) = p.TYP_DERNIER_MSG
AND sp.phmr_status(+) = p.phmr_status
**AND p.phmr_id(+) = p2.phmr_id**;
我该如何解决这个问题？
此致
答案 0 :(得分：2)
我想如果你替换：
FROM phmr p,
**phmr_presta p2**,
使用
FROM phmr p,
(SELECT IP1.PHMR_ID, IP1.TYP_DERNIER_JALON
FROM phmr_Presta IP1,
(SELECT phmr_id, max(phmr_presta_id) M_PRESTA_ID
FROM phmr_presta
GROUP BY phmr_id
) IP2
where IP1.PHMR_ID = IP2.PHMR_ID
and IP1.PHMR_PRESTA_ID = IP2.M_PRESTA_ID) P2
您将获得所需的结果。
这样做是为phmr_presta中的每个phmr_ID获取max_PHMR_PRESETA_ID。然后它返回到PHMR_PRESTA以获得您之后的TYP_DERNIER_JALON。然后我将其替换为您拥有的表，因为这是该表的子集。
可能有一种更有效的方式来编写整个视图。但我专注于你所遇到的具体问题，而不是整个观点。哦...... 在此之后你不应该有所不同......
如果您创建了一个包含示例数据的小提琴，我可以对此进行测试，但如果没有您提供的数据和模型，我并不倾向于这样做。所以这是UNTESTED并且可能有一些语法错误。
注意未来的问题：消除所有额外的列等。将问题分解为最简单的形式并将其作为问题。这里额外的列和表是＆＃34; noise＆＃34;尽管如此，还是要多考虑一下;并且非常不必要。
答案 1 :(得分：0)
这就是你如何做到的。如果你想要别的东西，那就别忘了写一个更好的规范。
select distinct PHMR_ID
from VW_PHMR