.replace(username='the-user', last_login=datetime.now()) .execute())#This query is equivalent:user_id =(User .insert(username='the-user', last_login=datetime.now()) .on_conflict_replace() .execute()) 另外mysql 还提供了一种独有的语法ON DUPLICATE KEY UPDATE可以使用以下方法实现。 classUs...
insert().on_conflict_replace 遇到数据冲突替换,替换原本数据。和on_conflict()默认行为一致。 insert_many: 批量插入 bulk_create:批量插入,类似于insert_many。可指定单次插入的数量 batch_commit: 自动添加了一个事务,然后一条条的插入 insert_from: 从另一个表中查询的数据作为插入的数据删除...
无论以前是否存在过,存在更新,不存在则插入 replace与on_conflict_replace()是等效的 last_login值将更新, user_id = User.replace(username='the-user', last_login=datetime.now()).execute()) user_id = User.insert(username='the-user', last_login=datetime.now()).on...
Insert.on_conflict_ignore() Insert.on_conflict_replace() Insert.on_conflict() Delete Index Index.safe() Index.where() Index.using() ModelIndex Fields Field Field.column Field.model Field.name Field.db_value() Field.python_value() Field.coerce() IntegerField BigIntegerField SmallIntegerField ...
replace(username='the-user', last_login=datetime.now()) .execute()) # This query is equivalent: user_id = (User .insert(username='the-user', last_login=datetime.now()) .on_conflict_replace() .execute()) Note In addition to replace, SQLite, MySQL and Postgresql provide an ignore ...
.on_conflict_replace()和on_conflict_ignore()都插入了一个新行,这不是我想要的。 有没有比upsert更好的方法来实现这一点,或者upsert有没有一些额外的功能,可以让我做我想做而没有看到的事情? 代码示例: 代码语言:javascript 复制 from peeweeimport*from playhouse.sqlite_extimportSqliteExtDatabase ...
'INSERT OR REPLACE INTO "users" ("username") VALUES (?)')) self.assertEqual(params, ['charlie']) def test_on_conflict(self): query = User.insert(username='huey').on_conflict('IGNORE') sql, params = compiler.generate_insert(query) self.assertEqual(sql, ( 'INSERT OR IGNORE INTO "us...
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on conflict (“Upsert”) SQLite 从版本3.24.0开始,引入了“upsert”概念:它是一个insert语句,可以优雅地处理主键和唯一约束的冲突。...upsert子句的开头。...派生的数据库表(如Select语句返回的查询结果集)中的列名可以通过SELECT语句、FROM语句或WITH语句来进行改变 2:据我所知,也许可以通过可更新视图或派生...
This introduces a new keyword-argument to the on_conflict() method: conflict_constraint, which is currently only supported by Postgresql. Refs issue #1737. Fixed incorrect SQL for sub-selects used on the right side of IN expressions. Previously the query would be assigned an alias, even ...