Question

我设计了这四个表：

CREATE TABLE Person(
    id VARCHAR(50) PRIMARY KEY,
    name VARCHAR(50) 
);


CREATE TABLE Coach(
    id VARCHAR(50) PRIMARY KEY,
    team VARCHAR(50) , 
    FOREIGN KEY (id) REFERENCES Person(id)
);

CREATE TABLE Player(
    id VARCHAR(50) PRIMARY KEY,
    team VARCHAR(50) , 
    age INT , 
    FOREIGN KEY (id) REFERENCES Person(id)
);

CREATE TABLE Refree(
    id VARCHAR(50) PRIMARY KEY,
    fifa_grade VARCHAR(50) , 
    FOREIGN KEY (id) REFERENCES Person(id)
);

CREATE TABLE Team(
    name varchar(30) PRIMARY KEY
);

我想将所有不在空闲状态，教练和球员表中的人插入球员表中，并将球员团队设置为“巴塞罗那”，并将球员年龄设置为30岁，i尝试过代码打击，但它给了我语法错误：

insert into player (id,'chelsea',24)
select id
from person
where person.id not in (select id from coach) and person.id not in (select id from player) and person.id not in (select id from refree)

我该如何解决此代码？

Answer 1

您的查询不正确，您可以使用select中的值：

INSERT INTO player (id, team, age)
SELECT id, 'barcelona', 30
from person p
left join coach c on p.id = c.id
left join player ply on p.id = ply.id
left join refree r on p.id = r.id
WHERE c.id IS NULL and ply.id IS NULL and r.id IS NULL

Answer 2

您需要列出insert中的列：

insert into player (id, team, age)
    select id, 'chelsea', 24
    from person
    where person.id not in (select id from coach) and
          person.id not in (select id from player) and 
          person.id not in (select id from refree)

如何将数据从一个表插入到另一个表并用所需数据填充其他列

2 个答案: