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         ½ñÌ쿪·¢¹ý³ÌÖÐÓöµ½ÁËÒ»¸öºÜÂé·³µÄÍâÁ¬½ÓµÄÎÊÌ⣬µ½×îºó¶¼Ã»ÓÐÕÒµ½ºÜºÃµÄ½â¾ö·½·¨£¬×îºóÖ»ÄÜÓÃunion all ʵÏÖÁË£¬ËäÈ»ÐÔÄܲ»±ÈÍâÁ¬½Ó£¬µ«ÖÁÉÙÍØÕ¹ÁËÍâÁ¬½ÓµÄ¾ÖÏÞÐÔ¡£ Ê×Ïȸø³öÎÒ²âÊÔÓõÄÈý¸ö±íºÍÊý¾Ý£¨×óÓÒÍâÁ¬½ÓµÀÀíÊÇÒ»ÑùµÄ£¬ÎÒÖ»×ܽáÁË×óÁ¬½Ó£©£º KC21±í£º create table KC21
(
AKB020 VARCHAR2(14) not null,
AKC190 VARCHAR2(18) not null,
AAC001 VARCHAR2(20) not null
);
INSERT INTO KC21 (AKB020, AKC190, AAC001) VALUES('110', '266', '1302012062942');
INSERT INTO KC21 (AKB020, AKC190, AAC001) VALUES('456', '369', '1302012063210');
INSERT INTO KC21 (AKB020, AKC190, AAC001) VALUES('1000', '472', '1302012045811');
INSERT INTO KC21 (AKB020, AKC190, AAC001) VALUES('123', '335', '1302012063275');
KC24񡜧
create table KC24
(
AKB020 VARCHAR2(14) not null,
AKC190 VARCHAR2(18) not null,
AAE072 VARCHAR2(20) not null
);
insert into KC24 (AKB020, AKC190, AAE072)values ('110', '335', '2188038055');
insert into KC24 (AKB020, AKC190, AAE072)values ('11', '369', '2188038092');
insert into KC24 (AKB020, AKC190, AAE072)values ('1000', '472', '2188038197');
insert into KC24 (AKB020, AKC190, AAE072)values ('110', '339', '2188038058');
KB01񡜧
create table KB01
(
AKB020 VARCHAR2(14) not null,
AKB021 VARCHAR2(50)
);
insert into KB01 (AKB020, AKB021)values ('1000', 'ÌÆÉ½ÊµÊ±²âÊÔÒ½Ôº');
insert into KB01 (AKB020, AKB021)values ('110', 'ÌÆÉ½´óÒ½ÔºA');
insert into KB01 (AKB020, AKB021)values ('123', 'ÌÆÉ½´óÒ½ÔºB');
insert into KB01 (AKB020, AKB021)values ('456', 'ÌÆÉ½´óÒ½ÔºC');
insert into KB01 (AKB020, AKB021)values ('11', 'ÌÆÉ½´óÒ½ÔºD');
oracle¹Ù·½ÌṩÁËÁ½ÖÖ·½À´ÊµÏÖÍâÁ¬½Ó£¬Ò»ÖÖÊÇÔÚfrom×Ó¾äÖÐʹÓÃleft outer join/right outer join/full outer join£¬ÁíÍâÒ»ÖÖÊÇ
ÔÚwhere×Ó¾äÖÐʹÓôó¼Ò¶¼±È½ÏÊìϤµÄ·ûºÅ¡°(+)¡±,ÕâÀïÎÒÏëдһÏÂÎÒ¶ÔÕâÁ½¸ö·½·¨µÄÀí½â¡£
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SQL> select * from kc21 left outer join kc24 on kc21.akb020=kc24.akb020;

AKB020 AKC190 AAC


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¡¾×ª¡¿³õʶ oracle ÖеÄË÷Òý×éÖ¯±í

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