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, ...
CREATETABLE'ZIP'( 'Zip'INTEGERPRIMARYKEYNOTNULL, 'City'TEXTNOTNULL, 'State'TEXTNOTNULL ); CREATETABLE'ADDRESS'( 'Address_id'INTEGERPRIMARYKEYAUTOINCREMENT, 'Line_1'TEXTNOTNULL, 'Line_2'TEXT, 'Zip'INTEGERNOTNULL, FOREIGNKEY('Zip')REFERENCESZIP('Zip')ONDELETECASCADE ); INSERTORIGNOREINTOZIP(...
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)" con.execute(b) con.commit() a = "insert into a (name) v...
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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...
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...
(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...
Prevent possible data loss when editing table with foreign keys enabled and ON DELETE CASCADE references (#1481) Fix view when loading a project file while being in the Edit Pragma tab (a23c0a0) Avoid confusion about the SQLCipher version in the About dialog (#1474) Don't remove a record ...
Working with a database starts from creating tables. How do you tell TypeORM to create a database table? The answer is - through the models. Your models in your app are your database tables.For example, you have a Photo model:export class Photo { id: number name: string description: ...
DROP VIEW 表明 [CASCADE] 加CASCADE可以在删除该视图之余,把由它导出的视图也一起删了,如果某个视图还导出了子视图,不用CASCADE是删不掉这个视图的 要注意,如果删除了基本表,并不会连带删除由该表导出的视图,需要手动删除。 查询视图 查询视图和查询表的语法是一样的 ...