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(...
session.commit() # Delete the parent (should cascade to children) #session.delete(parent) #session.execute(Parent.__table__.delete().where(Parent.id == parent_id)) #self._engine.execute(Parent.__table__.delete().where(Parent.id == parent_id)) self._engine.execute("DELETE FROM parents...
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...
Delete cascade不适用于sqlite 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,它的设计目标是提供一个小型、快速、自包含的数据库引擎。相比于其他大型数据库系统,SQLite在功能上有一些限制。其中之一...
(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...
This SQLite tutorial explains how to use Foreign Keys with cascade delete in SQLite with syntax and examples. If a record in the parent table is deleted, then the corresponding records in the child table will automatically be deleted.
Using cascadeInsert allows us to not have to separately save photo and metadata objects now. Now we can simply save a photo object, and the metadata object will be saved automatically because of cascade options. createConnection(options).then(async connection => { // create photo object let ...
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 ...
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 (a23c0a0852ba0b59d3c9fea5f40add845a1307d8) Avoid confusion about the SQLCipher version in the About dialog...