我正在为 SQLite 使用 SQLite 和数据库浏览器。我知道,如果您想使用 GUI 插入外键,您只需向右滚动并双击即可将外键插入相应的字段。问题是当您想使用多个外键时。我应该如何或在哪里使用 GUI 放置多个外键约束?我的实际 sql 是(返回异常'外键不匹配 - 引用“蜂箱”的“疾病”......'):
CREATE TABLE "diseases" (
"id" INTEGER NOT NULL,
"id_beehive" INTEGER NOT NULL,
"id_apiary" INTEGER NOT NULL,
"disease" TEXT NOT NULL,
"treatment" TEXT NOT NULL,
"start_treat_date" DATE NOT NULL,
"end_treat_date" DATE,
PRIMARY KEY("id"),
FOREIGN KEY("id_beehive") REFERENCES "beehives"("number") ON UPDATE CASCADE,
FOREIGN KEY("id_apiary") REFERENCES "beehives"("id_apiary") ON UPDATE CASCADE
);
我想使用 gui 做的是:
CREATE TABLE "diseases" (
"id" INTEGER NOT NULL,
"id_beehive" INTEGER NOT NULL,
"id_apiary" INTEGER NOT NULL,
"disease" TEXT NOT NULL,
"treatment" TEXT NOT NULL,
"start_treat_date" DATE NOT NULL,
"end_treat_date" DATE,
PRIMARY KEY("id"),
FOREIGN KEY("id_beehive","id_apiary") REFERENCES "beehives"("number","id_apiary") ON UPDATE CASCADE
);
蜂箱 sql:
CREATE TABLE "beehives" (
"number" INTEGER NOT NULL,
"id_apiary" INTEGER NOT NULL DEFAULT -2,
"date" DATE,
"type" TEXT,
"favorite" BOOLEAN DEFAULT 'false',
PRIMARY KEY("number","id_apiary"),
FOREIGN KEY("id_apiary") REFERENCES "apiaries"("id") ON DELETE SET NULL
);