SQLite:ON DELETE CASCADE 无法正常工作 Gae*_*aem 3 sqlite 我经常尝试并查看其他论坛帖子,但它们对我没有帮助。这是我的问题:我创建这样的表:CREATE TABLE IF NOT EXISTS Parent (Id INTEGER PRIMARY KEY, Name STRING); CREATE TABLE IF NOT EXISTS Child (Id INTEGER, Name STRING, ParentId INTEGER, ...
1 ON DELETE CASCADE not working in SQLite 2 On delete cascade android 2.2 1 SQLite on delete cascade doesnt work 2 Android On Delete Cascade not working properly 6 ON DELETE CASCADE is not working is in sqlite3 in ios 0 sqLite ON DELETE CASCADE not working on Android 1 Delete c...
当创建表时，CASCADE需要到位，Sqlite也必须配置为PRAGMA foreign_keys=1，例如
Delete cascade是一种数据库约束,用于在删除父表中的记录时自动删除相关的子表记录。然而,Delete cascade在SQLite数据库中不适用。 SQLite是一种轻量级的嵌入式数据库...
在SQLite中,外键约束可以定义在表的列上,以确保数据完整性。外键约束可以包括ON DELETE和ON UPDATE两种约束。 ON DELETE约束:当父表中的记录被删除时,可以...
import sqlite3 print(sqlite3.sqlite_version) con = sqlite3.connect(':memory:') a = "create table a (id integer primary key, name text)" con.execute(a) b = "create table b (id integer primary key, r integer, foreign key(r) references a(id) on delete cascade)" ...
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(id) ON DELETE CASCADE ON UPDATE CASCADE );数据的SQL语句INSERT INTO brand (brand_name,category_id) VALUES ('东鹏',1), ('马可波罗',1), ('索菲亚',2), ('索菲亚',3), ('蒙娜丽莎',1), ('金意陶',1), ('简一',1), ('欧神诺',1), ('冠珠',1), ('新中源',1); INSERT INTO brand...
一、配置数据库 1、安装扩展库 安装pymysql扩展库 pip install pymysql 安装flask-sqlalchemy扩展库 pip...
private static final String CREATE_TABELLA_USCITE = "CREATE TABLE AN_USCITE " + "(_ID integer, " + "CODICE_USCITA text null, SCADENZA text null, DATA text null," + "PERSONA text not null REFERENCES TB_PERSONE(CODICE_PERSONA) ON DELETE NO ACTION ON UPDATE CASCADE,PRIMARY KEY...