仅限Oracle SQL:用于根据条件显示结果的Case语句或exists查询
我试图使用case语句根据一些条件创建计算列。我离目标很近，但看不出问题出在哪里。希望我在这里得到一些最好/更简单的方法和帮助 下表为：仅限Oracle SQL:用于根据条件显示结果的Case语句或exists查询,sql,oracle,case-statement,Sql,Oracle,Case Statement,我试图使用case语句根据一些条件创建计算列。我离目标很近，但看不出问题出在哪里。希望我在这里得到一些最好/更简单的方法和帮助 下表为： 人员表： +----+--------+ | ID | PERSON | +----+--------+ | 1 | John | | 2 | Scott | | 3 | Ruth | | 4 | Smith | | 5 | Frank | | 6 | Martin | | 7 | Blake | +----+--------+
人员表：
+----+--------+
| ID | PERSON |
+----+--------+
| 1 | John |
| 2 | Scott |
| 3 | Ruth |
| 4 | Smith |
| 5 | Frank |
| 6 | Martin |
| 7 | Blake |
+----+--------+
+----+------+
| ID | ROLE |
+----+------+
| 1 | JJJ |
| 2 | Auth |
| 3 | AAA |
| 4 | MMM |
| 5 | KKK |
| 6 | BBB |
+----+------+
+----+-----------+---------+
| ID | PERSON_ID | ROLE_ID |
+----+-----------+---------+
| 1 | 1 | 1 |
| 2 | 2 | 2 |
| 3 | 2 | 3 |
| 4 | 2 | 4 |
| 5 | 3 | 1 |
| 6 | 3 | 5 |
| 7 | 4 | 3 |
| 8 | 5 | 6 |
| 9 | 6 | 3 |
| 10 | 6 | 6 |
| 11 | 6 | 2 |
| 12 | 7 | 5 |
| 13 | 7 | 6 |
+----+-----------+---------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| John | JJJ | |
| Scott | Auth | Remove |
| Scott | AAA | |
| Scott | MMM | |
| Ruth | JJJ | |
| Ruth | KKK | |
| Smith | AAA | Add |
| Frank | BBB | Add |
| Martin | AAA | |
| Martin | BBB | |
| Martin | Auth | Remove |
| Blake | KKK | |
| Blake | BBB | Add |
+--------+--------+----------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| Blake | KKK | |
| Blake | BBB | Add |
| Frank | BBB | Add |
| John | JJJ | |
| Martin | AUTH | Remove |
| Martin | BBB | Add |
| Martin | AAA | Add |
| Ruth | JJJ | |
| Ruth | KKK | |
| Scott | AAA | Add |
| Scott | AUTH | Remove |
| Scott | MMM | |
| Smith | AAA | Add |
+--------+--------+----------+
CREATE TABLE person (
id INTEGER NOT NULL,
person VARCHAR2(50 CHAR)
);
INSERT INTO person (
id,
person
) VALUES (
1,
'John'
);
INSERT INTO person (
id,
person
) VALUES (
2,
'Scott'
);
INSERT INTO person (
id,
person
) VALUES (
3,
'Ruth'
);
INSERT INTO person (
id,
person
) VALUES (
4,
'Smith'
);
INSERT INTO person (
id,
person
) VALUES (
5,
'Frank'
);
INSERT INTO person (
id,
person
) VALUES (
6,
'Martin'
);
INSERT INTO person (
id,
person
) VALUES (
7,
'Blake'
);
ALTER TABLE person ADD CONSTRAINT person_pk PRIMARY KEY ( id );
CREATE TABLE myrole (
id INTEGER NOT NULL,
role VARCHAR2(50 CHAR)
);
INSERT INTO myrole (
id,
role
) VALUES (
1,
'JJJ'
);
INSERT INTO myrole (
id,
role
) VALUES (
2,
'Auth'
);
INSERT INTO myrole (
id,
role
) VALUES (
3,
'AAA'
);
INSERT INTO myrole (
id,
role
) VALUES (
4,
'MMM'
);
INSERT INTO myrole (
id,
role
) VALUES (
5,
'KKK'
);
INSERT INTO myrole (
id,
role
) VALUES (
6,
'BBB'
);
ALTER TABLE myrole ADD CONSTRAINT myrole_pk PRIMARY KEY ( id );
CREATE TABLE person_role (
id INTEGER NOT NULL,
person_id INTEGER,
myrole_id INTEGER
);
ALTER TABLE person_role ADD CONSTRAINT person_role_pk PRIMARY KEY ( id );
CREATE SEQUENCE myrole_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER myrole_tr BEFORE
INSERT ON myrole
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := myrole_seq.nextval;
END;
/
CREATE SEQUENCE person_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_tr BEFORE
INSERT ON person
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_seq.nextval;
END;
/
CREATE SEQUENCE person_role_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_role_tr BEFORE
INSERT ON person_role
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_role_seq.nextval;
END;
/
+----+--------+
| ID | PERSON |
+----+--------+
| 1 | John |
| 2 | Scott |
| 3 | Ruth |
| 4 | Smith |
| 5 | Frank |
| 6 | Martin |
| 7 | Blake |
+----+--------+
+----+------+
| ID | ROLE |
+----+------+
| 1 | JJJ |
| 2 | Auth |
| 3 | AAA |
| 4 | MMM |
| 5 | KKK |
| 6 | BBB |
+----+------+
+----+-----------+---------+
| ID | PERSON_ID | ROLE_ID |
+----+-----------+---------+
| 1 | 1 | 1 |
| 2 | 2 | 2 |
| 3 | 2 | 3 |
| 4 | 2 | 4 |
| 5 | 3 | 1 |
| 6 | 3 | 5 |
| 7 | 4 | 3 |
| 8 | 5 | 6 |
| 9 | 6 | 3 |
| 10 | 6 | 6 |
| 11 | 6 | 2 |
| 12 | 7 | 5 |
| 13 | 7 | 6 |
+----+-----------+---------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| John | JJJ | |
| Scott | Auth | Remove |
| Scott | AAA | |
| Scott | MMM | |
| Ruth | JJJ | |
| Ruth | KKK | |
| Smith | AAA | Add |
| Frank | BBB | Add |
| Martin | AAA | |
| Martin | BBB | |
| Martin | Auth | Remove |
| Blake | KKK | |
| Blake | BBB | Add |
+--------+--------+----------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| Blake | KKK | |
| Blake | BBB | Add |
| Frank | BBB | Add |
| John | JJJ | |
| Martin | AUTH | Remove |
| Martin | BBB | Add |
| Martin | AAA | Add |
| Ruth | JJJ | |
| Ruth | KKK | |
| Scott | AAA | Add |
| Scott | AUTH | Remove |
| Scott | MMM | |
| Smith | AAA | Add |
+--------+--------+----------+
CREATE TABLE person (
id INTEGER NOT NULL,
person VARCHAR2(50 CHAR)
);
INSERT INTO person (
id,
person
) VALUES (
1,
'John'
);
INSERT INTO person (
id,
person
) VALUES (
2,
'Scott'
);
INSERT INTO person (
id,
person
) VALUES (
3,
'Ruth'
);
INSERT INTO person (
id,
person
) VALUES (
4,
'Smith'
);
INSERT INTO person (
id,
person
) VALUES (
5,
'Frank'
);
INSERT INTO person (
id,
person
) VALUES (
6,
'Martin'
);
INSERT INTO person (
id,
person
) VALUES (
7,
'Blake'
);
ALTER TABLE person ADD CONSTRAINT person_pk PRIMARY KEY ( id );
CREATE TABLE myrole (
id INTEGER NOT NULL,
role VARCHAR2(50 CHAR)
);
INSERT INTO myrole (
id,
role
) VALUES (
1,
'JJJ'
);
INSERT INTO myrole (
id,
role
) VALUES (
2,
'Auth'
);
INSERT INTO myrole (
id,
role
) VALUES (
3,
'AAA'
);
INSERT INTO myrole (
id,
role
) VALUES (
4,
'MMM'
);
INSERT INTO myrole (
id,
role
) VALUES (
5,
'KKK'
);
INSERT INTO myrole (
id,
role
) VALUES (
6,
'BBB'
);
ALTER TABLE myrole ADD CONSTRAINT myrole_pk PRIMARY KEY ( id );
CREATE TABLE person_role (
id INTEGER NOT NULL,
person_id INTEGER,
myrole_id INTEGER
);
ALTER TABLE person_role ADD CONSTRAINT person_role_pk PRIMARY KEY ( id );
CREATE SEQUENCE myrole_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER myrole_tr BEFORE
INSERT ON myrole
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := myrole_seq.nextval;
END;
/
CREATE SEQUENCE person_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_tr BEFORE
INSERT ON person
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_seq.nextval;
END;
/
CREATE SEQUENCE person_role_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_role_tr BEFORE
INSERT ON person_role
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_role_seq.nextval;
END;
/
人员角色表：
+----+--------+
| ID | PERSON |
+----+--------+
| 1 | John |
| 2 | Scott |
| 3 | Ruth |
| 4 | Smith |
| 5 | Frank |
| 6 | Martin |
| 7 | Blake |
+----+--------+
+----+------+
| ID | ROLE |
+----+------+
| 1 | JJJ |
| 2 | Auth |
| 3 | AAA |
| 4 | MMM |
| 5 | KKK |
| 6 | BBB |
+----+------+
+----+-----------+---------+
| ID | PERSON_ID | ROLE_ID |
+----+-----------+---------+
| 1 | 1 | 1 |
| 2 | 2 | 2 |
| 3 | 2 | 3 |
| 4 | 2 | 4 |
| 5 | 3 | 1 |
| 6 | 3 | 5 |
| 7 | 4 | 3 |
| 8 | 5 | 6 |
| 9 | 6 | 3 |
| 10 | 6 | 6 |
| 11 | 6 | 2 |
| 12 | 7 | 5 |
| 13 | 7 | 6 |
+----+-----------+---------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| John | JJJ | |
| Scott | Auth | Remove |
| Scott | AAA | |
| Scott | MMM | |
| Ruth | JJJ | |
| Ruth | KKK | |
| Smith | AAA | Add |
| Frank | BBB | Add |
| Martin | AAA | |
| Martin | BBB | |
| Martin | Auth | Remove |
| Blake | KKK | |
| Blake | BBB | Add |
+--------+--------+----------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| Blake | KKK | |
| Blake | BBB | Add |
| Frank | BBB | Add |
| John | JJJ | |
| Martin | AUTH | Remove |
| Martin | BBB | Add |
| Martin | AAA | Add |
| Ruth | JJJ | |
| Ruth | KKK | |
| Scott | AAA | Add |
| Scott | AUTH | Remove |
| Scott | MMM | |
| Smith | AAA | Add |
+--------+--------+----------+
CREATE TABLE person (
id INTEGER NOT NULL,
person VARCHAR2(50 CHAR)
);
INSERT INTO person (
id,
person
) VALUES (
1,
'John'
);
INSERT INTO person (
id,
person
) VALUES (
2,
'Scott'
);
INSERT INTO person (
id,
person
) VALUES (
3,
'Ruth'
);
INSERT INTO person (
id,
person
) VALUES (
4,
'Smith'
);
INSERT INTO person (
id,
person
) VALUES (
5,
'Frank'
);
INSERT INTO person (
id,
person
) VALUES (
6,
'Martin'
);
INSERT INTO person (
id,
person
) VALUES (
7,
'Blake'
);
ALTER TABLE person ADD CONSTRAINT person_pk PRIMARY KEY ( id );
CREATE TABLE myrole (
id INTEGER NOT NULL,
role VARCHAR2(50 CHAR)
);
INSERT INTO myrole (
id,
role
) VALUES (
1,
'JJJ'
);
INSERT INTO myrole (
id,
role
) VALUES (
2,
'Auth'
);
INSERT INTO myrole (
id,
role
) VALUES (
3,
'AAA'
);
INSERT INTO myrole (
id,
role
) VALUES (
4,
'MMM'
);
INSERT INTO myrole (
id,
role
) VALUES (
5,
'KKK'
);
INSERT INTO myrole (
id,
role
) VALUES (
6,
'BBB'
);
ALTER TABLE myrole ADD CONSTRAINT myrole_pk PRIMARY KEY ( id );
CREATE TABLE person_role (
id INTEGER NOT NULL,
person_id INTEGER,
myrole_id INTEGER
);
ALTER TABLE person_role ADD CONSTRAINT person_role_pk PRIMARY KEY ( id );
CREATE SEQUENCE myrole_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER myrole_tr BEFORE
INSERT ON myrole
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := myrole_seq.nextval;
END;
/
CREATE SEQUENCE person_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_tr BEFORE
INSERT ON person
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_seq.nextval;
END;
/
CREATE SEQUENCE person_role_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_role_tr BEFORE
INSERT ON person_role
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_role_seq.nextval;
END;
/
+----+--------+
| ID | PERSON |
+----+--------+
| 1 | John |
| 2 | Scott |
| 3 | Ruth |
| 4 | Smith |
| 5 | Frank |
| 6 | Martin |
| 7 | Blake |
+----+--------+
+----+------+
| ID | ROLE |
+----+------+
| 1 | JJJ |
| 2 | Auth |
| 3 | AAA |
| 4 | MMM |
| 5 | KKK |
| 6 | BBB |
+----+------+
+----+-----------+---------+
| ID | PERSON_ID | ROLE_ID |
+----+-----------+---------+
| 1 | 1 | 1 |
| 2 | 2 | 2 |
| 3 | 2 | 3 |
| 4 | 2 | 4 |
| 5 | 3 | 1 |
| 6 | 3 | 5 |
| 7 | 4 | 3 |
| 8 | 5 | 6 |
| 9 | 6 | 3 |
| 10 | 6 | 6 |
| 11 | 6 | 2 |
| 12 | 7 | 5 |
| 13 | 7 | 6 |
+----+-----------+---------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| John | JJJ | |
| Scott | Auth | Remove |
| Scott | AAA | |
| Scott | MMM | |
| Ruth | JJJ | |
| Ruth | KKK | |
| Smith | AAA | Add |
| Frank | BBB | Add |
| Martin | AAA | |
| Martin | BBB | |
| Martin | Auth | Remove |
| Blake | KKK | |
| Blake | BBB | Add |
+--------+--------+----------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| Blake | KKK | |
| Blake | BBB | Add |
| Frank | BBB | Add |
| John | JJJ | |
| Martin | AUTH | Remove |
| Martin | BBB | Add |
| Martin | AAA | Add |
| Ruth | JJJ | |
| Ruth | KKK | |
| Scott | AAA | Add |
| Scott | AUTH | Remove |
| Scott | MMM | |
| Smith | AAA | Add |
+--------+--------+----------+
CREATE TABLE person (
id INTEGER NOT NULL,
person VARCHAR2(50 CHAR)
);
INSERT INTO person (
id,
person
) VALUES (
1,
'John'
);
INSERT INTO person (
id,
person
) VALUES (
2,
'Scott'
);
INSERT INTO person (
id,
person
) VALUES (
3,
'Ruth'
);
INSERT INTO person (
id,
person
) VALUES (
4,
'Smith'
);
INSERT INTO person (
id,
person
) VALUES (
5,
'Frank'
);
INSERT INTO person (
id,
person
) VALUES (
6,
'Martin'
);
INSERT INTO person (
id,
person
) VALUES (
7,
'Blake'
);
ALTER TABLE person ADD CONSTRAINT person_pk PRIMARY KEY ( id );
CREATE TABLE myrole (
id INTEGER NOT NULL,
role VARCHAR2(50 CHAR)
);
INSERT INTO myrole (
id,
role
) VALUES (
1,
'JJJ'
);
INSERT INTO myrole (
id,
role
) VALUES (
2,
'Auth'
);
INSERT INTO myrole (
id,
role
) VALUES (
3,
'AAA'
);
INSERT INTO myrole (
id,
role
) VALUES (
4,
'MMM'
);
INSERT INTO myrole (
id,
role
) VALUES (
5,
'KKK'
);
INSERT INTO myrole (
id,
role
) VALUES (
6,
'BBB'
);
ALTER TABLE myrole ADD CONSTRAINT myrole_pk PRIMARY KEY ( id );
CREATE TABLE person_role (
id INTEGER NOT NULL,
person_id INTEGER,
myrole_id INTEGER
);
ALTER TABLE person_role ADD CONSTRAINT person_role_pk PRIMARY KEY ( id );
CREATE SEQUENCE myrole_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER myrole_tr BEFORE
INSERT ON myrole
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := myrole_seq.nextval;
END;
/
CREATE SEQUENCE person_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_tr BEFORE
INSERT ON person
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_seq.nextval;
END;
/
CREATE SEQUENCE person_role_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_role_tr BEFORE
INSERT ON person_role
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_role_seq.nextval;
END;
/
+----+--------+
| ID | PERSON |
+----+--------+
| 1 | John |
| 2 | Scott |
| 3 | Ruth |
| 4 | Smith |
| 5 | Frank |
| 6 | Martin |
| 7 | Blake |
+----+--------+
+----+------+
| ID | ROLE |
+----+------+
| 1 | JJJ |
| 2 | Auth |
| 3 | AAA |
| 4 | MMM |
| 5 | KKK |
| 6 | BBB |
+----+------+
+----+-----------+---------+
| ID | PERSON_ID | ROLE_ID |
+----+-----------+---------+
| 1 | 1 | 1 |
| 2 | 2 | 2 |
| 3 | 2 | 3 |
| 4 | 2 | 4 |
| 5 | 3 | 1 |
| 6 | 3 | 5 |
| 7 | 4 | 3 |
| 8 | 5 | 6 |
| 9 | 6 | 3 |
| 10 | 6 | 6 |
| 11 | 6 | 2 |
| 12 | 7 | 5 |
| 13 | 7 | 6 |
+----+-----------+---------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| John | JJJ | |
| Scott | Auth | Remove |
| Scott | AAA | |
| Scott | MMM | |
| Ruth | JJJ | |
| Ruth | KKK | |
| Smith | AAA | Add |
| Frank | BBB | Add |
| Martin | AAA | |
| Martin | BBB | |
| Martin | Auth | Remove |
| Blake | KKK | |
| Blake | BBB | Add |
+--------+--------+----------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| Blake | KKK | |
| Blake | BBB | Add |
| Frank | BBB | Add |
| John | JJJ | |
| Martin | AUTH | Remove |
| Martin | BBB | Add |
| Martin | AAA | Add |
| Ruth | JJJ | |
| Ruth | KKK | |
| Scott | AAA | Add |
| Scott | AUTH | Remove |
| Scott | MMM | |
| Smith | AAA | Add |
+--------+--------+----------+
CREATE TABLE person (
id INTEGER NOT NULL,
person VARCHAR2(50 CHAR)
);
INSERT INTO person (
id,
person
) VALUES (
1,
'John'
);
INSERT INTO person (
id,
person
) VALUES (
2,
'Scott'
);
INSERT INTO person (
id,
person
) VALUES (
3,
'Ruth'
);
INSERT INTO person (
id,
person
) VALUES (
4,
'Smith'
);
INSERT INTO person (
id,
person
) VALUES (
5,
'Frank'
);
INSERT INTO person (
id,
person
) VALUES (
6,
'Martin'
);
INSERT INTO person (
id,
person
) VALUES (
7,
'Blake'
);
ALTER TABLE person ADD CONSTRAINT person_pk PRIMARY KEY ( id );
CREATE TABLE myrole (
id INTEGER NOT NULL,
role VARCHAR2(50 CHAR)
);
INSERT INTO myrole (
id,
role
) VALUES (
1,
'JJJ'
);
INSERT INTO myrole (
id,
role
) VALUES (
2,
'Auth'
);
INSERT INTO myrole (
id,
role
) VALUES (
3,
'AAA'
);
INSERT INTO myrole (
id,
role
) VALUES (
4,
'MMM'
);
INSERT INTO myrole (
id,
role
) VALUES (
5,
'KKK'
);
INSERT INTO myrole (
id,
role
) VALUES (
6,
'BBB'
);
ALTER TABLE myrole ADD CONSTRAINT myrole_pk PRIMARY KEY ( id );
CREATE TABLE person_role (
id INTEGER NOT NULL,
person_id INTEGER,
myrole_id INTEGER
);
ALTER TABLE person_role ADD CONSTRAINT person_role_pk PRIMARY KEY ( id );
CREATE SEQUENCE myrole_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER myrole_tr BEFORE
INSERT ON myrole
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := myrole_seq.nextval;
END;
/
CREATE SEQUENCE person_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_tr BEFORE
INSERT ON person
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_seq.nextval;
END;
/
CREATE SEQUENCE person_role_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_role_tr BEFORE
INSERT ON person_role
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_role_seq.nextval;
END;
/
SELECT p.person,upper(r.role) myrole,
case when p.person in (select p.person from person ut where ut.person = p.person and upper(r.role) = upper('Auth')) then 'Remove'
when p.person in (select p.person from person ut where ut.person = p.person and (upper(r.role) = upper('Auth') or (upper(r.role) = upper('AAA') or upper(r.role) = upper('BBB')))) then 'Add' else null
end as myaccess
FROM person p
join person_role pr
ON p.id = pr.person_id
join myrole r
ON r.id = pr.role_id
order by p.person
+----+--------+
| ID | PERSON |
+----+--------+
| 1 | John |
| 2 | Scott |
| 3 | Ruth |
| 4 | Smith |
| 5 | Frank |
| 6 | Martin |
| 7 | Blake |
+----+--------+
+----+------+
| ID | ROLE |
+----+------+
| 1 | JJJ |
| 2 | Auth |
| 3 | AAA |
| 4 | MMM |
| 5 | KKK |
| 6 | BBB |
+----+------+
+----+-----------+---------+
| ID | PERSON_ID | ROLE_ID |
+----+-----------+---------+
| 1 | 1 | 1 |
| 2 | 2 | 2 |
| 3 | 2 | 3 |
| 4 | 2 | 4 |
| 5 | 3 | 1 |
| 6 | 3 | 5 |
| 7 | 4 | 3 |
| 8 | 5 | 6 |
| 9 | 6 | 3 |
| 10 | 6 | 6 |
| 11 | 6 | 2 |
| 12 | 7 | 5 |
| 13 | 7 | 6 |
+----+-----------+---------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| John | JJJ | |
| Scott | Auth | Remove |
| Scott | AAA | |
| Scott | MMM | |
| Ruth | JJJ | |
| Ruth | KKK | |
| Smith | AAA | Add |
| Frank | BBB | Add |
| Martin | AAA | |
| Martin | BBB | |
| Martin | Auth | Remove |
| Blake | KKK | |
| Blake | BBB | Add |
+--------+--------+----------+
+--------+--------+----------+
| PERSON | MYROLE | MYACCESS |
+--------+--------+----------+
| Blake | KKK | |
| Blake | BBB | Add |
| Frank | BBB | Add |
| John | JJJ | |
| Martin | AUTH | Remove |
| Martin | BBB | Add |
| Martin | AAA | Add |
| Ruth | JJJ | |
| Ruth | KKK | |
| Scott | AAA | Add |
| Scott | AUTH | Remove |
| Scott | MMM | |
| Smith | AAA | Add |
+--------+--------+----------+
CREATE TABLE person (
id INTEGER NOT NULL,
person VARCHAR2(50 CHAR)
);
INSERT INTO person (
id,
person
) VALUES (
1,
'John'
);
INSERT INTO person (
id,
person
) VALUES (
2,
'Scott'
);
INSERT INTO person (
id,
person
) VALUES (
3,
'Ruth'
);
INSERT INTO person (
id,
person
) VALUES (
4,
'Smith'
);
INSERT INTO person (
id,
person
) VALUES (
5,
'Frank'
);
INSERT INTO person (
id,
person
) VALUES (
6,
'Martin'
);
INSERT INTO person (
id,
person
) VALUES (
7,
'Blake'
);
ALTER TABLE person ADD CONSTRAINT person_pk PRIMARY KEY ( id );
CREATE TABLE myrole (
id INTEGER NOT NULL,
role VARCHAR2(50 CHAR)
);
INSERT INTO myrole (
id,
role
) VALUES (
1,
'JJJ'
);
INSERT INTO myrole (
id,
role
) VALUES (
2,
'Auth'
);
INSERT INTO myrole (
id,
role
) VALUES (
3,
'AAA'
);
INSERT INTO myrole (
id,
role
) VALUES (
4,
'MMM'
);
INSERT INTO myrole (
id,
role
) VALUES (
5,
'KKK'
);
INSERT INTO myrole (
id,
role
) VALUES (
6,
'BBB'
);
ALTER TABLE myrole ADD CONSTRAINT myrole_pk PRIMARY KEY ( id );
CREATE TABLE person_role (
id INTEGER NOT NULL,
person_id INTEGER,
myrole_id INTEGER
);
ALTER TABLE person_role ADD CONSTRAINT person_role_pk PRIMARY KEY ( id );
CREATE SEQUENCE myrole_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER myrole_tr BEFORE
INSERT ON myrole
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := myrole_seq.nextval;
END;
/
CREATE SEQUENCE person_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_tr BEFORE
INSERT ON person
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_seq.nextval;
END;
/
CREATE SEQUENCE person_role_seq START WITH 1 NOCACHE;
CREATE OR REPLACE TRIGGER person_role_tr BEFORE
INSERT ON person_role
FOR EACH ROW
WHEN ( new.id IS NULL )
BEGIN
:new.id := person_role_seq.nextval;
END;
/
Richa这就是你要找的吗？
在你的情况下，你说： 若此人的角色为“AAA”或“BBB”，而不是“Auth”，则MYAccess列应将该人员的值显示为“Add”。所有其他值均应为空。 " Scott具有Auth，因此此条件产生false。根据这条规则，Scott不应该有“Add”。在您的预期输出中，它有“Add”。我错过什么了吗
WITH person_roles (id, person_id, role_id) AS
(
SELECT 1, 1,1 FROM DUAL UNION ALL
SELECT 2, 2,2 FROM DUAL UNION ALL
SELECT 3, 2,3 FROM DUAL UNION ALL
SELECT 4, 2,4 FROM DUAL UNION ALL
SELECT 5, 3,1 FROM DUAL UNION ALL
SELECT 6, 3,5 FROM DUAL UNION ALL
SELECT 7, 4,3 FROM DUAL UNION ALL
SELECT 8, 5,6 FROM DUAL UNION ALL
SELECT 9, 6,3 FROM DUAL UNION ALL
SELECT 10, 6,6 FROM DUAL UNION ALL
SELECT 11, 6,2 FROM DUAL UNION ALL
SELECT 12, 7,5 FROM DUAL UNION ALL
SELECT 13, 7,6 FROM DUAL
),persons (id, person) AS
(
SELECT 1,'John' FROM DUAL UNION ALL
SELECT 2,'Scott' FROM DUAL UNION ALL
SELECT 3,'Ruth' FROM DUAL UNION ALL
SELECT 4,'Smith' FROM DUAL UNION ALL
SELECT 5,'Frank' FROM DUAL UNION ALL
SELECT 6,'Martin' FROM DUAL UNION ALL
SELECT 7,'Blake' FROM DUAL
),roles (id, role) AS
(
SELECT 1,'JJJ' FROM DUAL UNION ALL
SELECT 2,'Auth' FROM DUAL UNION ALL
SELECT 3,'AAA' FROM DUAL UNION ALL
SELECT 4,'MMM' FROM DUAL UNION ALL
SELECT 5,'KKK' FROM DUAL UNION ALL
SELECT 6,'BBB' FROM DUAL
), rule_1(person_id, role_type) AS
(
SELECT p.id, MIN(CASE WHEN r.ROLE = 'Auth' THEN 0 WHEN r.ROLE in ('AAA','BBB') THEN 1 ELSE 2 END)
FROM person_roles pr
JOIN persons p ON p.id = pr.person_id
JOIN roles r ON r.id = pr.role_id
GROUP BY p.id
)
SELECT p.person, r.role,
CASE
WHEN rl.role_type = 1 AND r.role IN ('AAA','BBB') THEN 'Add'
WHEN rl.role_type = 0 AND r.role = 'Auth' THEN 'Remove'
END as action
FROM person_roles pr
JOIN persons p ON p.id = pr.person_id
JOIN roles r ON r.id = pr.role_id
JOIN rule_1 rl ON rl.person_id = pr.person_id
ORDER BY p.person
PERSON ROLE ACTION
------ ---- ------
Blake BBB Add
Blake KKK
Frank BBB Add
John JJJ
Martin AAA
Martin Auth Remove
Martin BBB
Ruth KKK
Ruth JJJ
Scott MMM
Scott AAA
Scott Auth Remove
Smith AAA Add
SELECT p.person, r.role,
CASE
WHEN rl.role_type = 1 AND r.role IN ('AAA','BBB') THEN 'Add'
WHEN rl.role_type = 0 AND r.role = 'Auth' THEN 'Remove'
END as action
FROM person_roles pr
JOIN persons p ON p.id = pr.person_id
JOIN roles r ON r.id = pr.role_id
JOIN (
SELECT p.id, MIN(CASE WHEN r.ROLE = 'Auth' THEN 0 WHEN r.ROLE in ('AAA','BBB') THEN 1 ELSE 2 END) as role_type
FROM person_roles pr
JOIN persons p ON p.id = pr.person_id
JOIN roles r ON r.id = pr.role_id
GROUP BY p.id
) rl ON rl.id = pr.person_id
ORDER BY p.person
看起来像是数据问题，或者添加部分的or语句需要一些工作。我在你的桌子上看到斯科特和马丁两次。第一个与Remove列匹配，并且使用OR语句逻辑，看起来它将这两条记录的第二行作为ADD。尝试将您的case语句分为多个部分，并单独运行以测试以缩小范围。此外，如果您可以发布可重复的代码，以便我们可以复制/粘贴它以运行它，则将帮助您更快、更轻松地获得帮助“join”不是一种表类型。您所称的“连接”表称为“详细信息”表。我将编辑你的帖子以进行更改，我想让你知道我在做什么以及为什么。另外，你确定你的详细信息表是正确的吗？在查询中，它似乎只有id（应该是这样），而没有名称和角色名称。您现在发布的“详细信息”表已经有了名称和角色名称，无需加入详细信息表。@mathguy感谢您的更改。明细表只有ID。我以所需的输出表为例展示了我的输出应该是什么样子，我编写的查询就是这样做的，只是计算不正确。Koen Lostrie您的理解是正确的。谢谢你的询问。我可以知道，如果只使用一个select语句而不是“WITH”子句，是否可以生成相同的输出？我问，因为我有其他列显示在我的实时查询。更新我的回答谢谢你科恩Lostrie。我接受了你的回答，投了赞成票。谢谢你的时间和帮助，我很乐意帮助你--KoenHow在另一个专栏上做Listag？我试图在这里添加表结构，但stackoverflow只有文本区域。所以在这里创建了另一个帖子