链式查询 通过主键获取数据 查询一条数据 获取一列 一维数组 关联数组 关联数组（值为数组） 值查询 查询多条数据 查询条数限制 分页 排序 分组 链式查询 通过主键获取数据 User :: find ( 100 ); //SQL: SELECT * FROM user WHERE id = 100; Use...

Scopes Definition Usage Merging Associations Scopes Scoping allows you to define commonly used queries that you can easily use later. Scopes can include all the same attrib...

Definition Usage Merging Associations Definition Scoping allows you to define commonly used queries that you can easily use later. Scopes can include all the same attribute...

删除记录 删除钩子 批量删除 阻止全局删除 软删除 查找被软删除的记录 永久删除 删除记录 删除一条记录 // 删除一条已有的记录（email 的主键值为 10） db . Delete (& email ) // DELETE from emails where id=10; // 通过内联条件删除记录 db . ...

SQL SQL Supporting Status Totally Supported Regular Query Subquery Sharding value in expression Experimental Supported Subquery Join with cross databases Unsupported SQL Ex...

Filtering records More query examples Filtering records You can filter for particular records using normal python operators. Peeweesupports a wide variety of query operators ....

6.10 使用闭包调试 链接 6.10 使用闭包调试 当您在分析和调试复杂的程序时，无数个函数在不同的代码文件中相互调用，如果这时候能够准确地知道哪个文件中的具体哪个函数正在执行，对于调试是十分有帮助的。您可以使用 runtime 或 log 包中的特殊函数来实现这样的功能。包 runtime 中的函数 Caller() 提供了相应的信息，因...

CRUD: Reading and Writing Data Create Create Record Default Values Setting Primary Key In Callbacks Extra Creating option Query Query With Where (Plain SQL) Query With Where ...

Raw SQL Named Argument DryRun Mode ToSQL Row & Rows Scan *sql.Rows into struct Connection Advanced Clauses Clause Builder Clause Options StatementModifier Raw SQL ...

DELETE Statement (Impala 2.8 or higher only) DELETE Statement (Impala 2.8 or higher only) Deletes an arbitrary number of rows from a Kudu table. This statement only works for I...