我試圖插入一行到表中,該表有3個外鍵。要獲得這些密鑰,我有「獨特」的搜索文件。MySQL插入到選擇
SQL
create table user(
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(30) NOT NULL,
username VARCHAR(50) NOT NULL,
password VARCHAR(30) NOT NULL,
access_token VARCHAR(32),
reg_date TIMESTAMP,
UNIQUE(username),
UNIQUE(access_token)
);
create table pharmacy(
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
places_id VARCHAR(50) NOT NULL,
name VARCHAR(30) NOT NULL,
coord VARCHAR(50) NOT NULL,
description VARCHAR(100),
reg_date TIMESTAMP,
UNIQUE(places_id)
);
create table item(
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(30) NOT NULL,
description VARCHAR(100),
reg_date TIMESTAMP,
UNIQUE(name)
);
create table item_bought(
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
id_user INT(6) UNSIGNED,
id_pharmacy INT(6) UNSIGNED,
id_item INT(6) UNSIGNED,
price float(6,2) NOT NULL,
bought_date date,
reg_date TIMESTAMP,
foreign key(id_user)
references user(id),
foreign key(id_pharmacy)
references pharmacy(id),
foreign key(id_item)
references item(id)
);
查詢我建立在JAVA:
INSERT INTO item_bought (id_user, id_pharmacy, id_item, price, bought_date)
SELECT user.id, pharmacy.id, item.id, 12.32, date('1999-02-24')
FROM user, pharmacy, item
WHERE (SELECT user.id, user.username, pharmacy.id,
pharmacy.places_id, item.id, item.name
FROM item, pharmacy, item
WHERE user.username='jhon', pharmacy.places_id='id1', item.name='ibuprufen')
這是我得到的錯誤:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Not unique table/alias: 'item'
感謝您的幫助:d
解決方案
基於戈登·利諾夫的答案:
INSERT INTO item_bought (id_user, id_pharmacy, id_item, price, bought_date)
SELECT (SELECT u.id FROM user u WHERE u.username = 'jhon'),
(SELECT p.id FROM pharmacy p WHERE p.places_id = 'id1'),
(SELECT i.id FROM item i WHERE i.name='ibuprufen'),
(SELECT 13.22), (SELECT date('1999-02-12'));
更優雅!
你想做什麼?您似乎不太可能希望將用戶,藥房和物品的完整笛卡爾產品插入表格中。示例數據和所需結果非常有用,特別是當查詢格式錯誤時。請注意:您的特定語法問題是'WHERE'子句中的逗號。 –
您是否嘗試過使用連接? – aizele