Migrating Database Applications Overview Supported Databases MySQL PostgreSQL MongoDB Migrating Database Applications Overview This topic reviews how to migrate MySQL, P...

ALTER DATABASE Synopsis Description Parameters Notes Examples Compatibility See Also ALTER DATABASE ALTER DATABASE — change a database Synopsis ALTER DATABASE name [...

Database Functions Comparison and conversion functions Cast Coalesce Collate Greatest JSONObject Least NullIf Date functions Extract DateField extracts DateTimeFi...

Database Methods Collection Create All Collections Collection Name Drop Truncate Database Methods Collection returns a single collection or null db._collection(collection...

Database instrumentation connection.execute_wrapper() Database instrumentation To help you understand and control the queries issued by your code, Django provides a hook for i...

Database statistics Database statistics The Database object keeps statistics on executed queries. You can check which queries were executed more often and how long it took to e...

Testing a Database Add tests for the SQL app File structure Create the new database session Create the database Dependency override Test the app Testing a Database Warning...

CREATE DATABASE 语法图 语法说明 示例 MySQL 兼容性 另请参阅 CREATE DATABASE CREATE DATABASE 语句用于在 TiDB 上创建新数据库。按照 SQL 标准，“数据库”一词在 MySQL 术语中最接近 “schema”。 语法图 CreateDatabaseStmt ::= ...

ALTER DATABASE 语法图 示例 MySQL 兼容性 另请参阅 ALTER DATABASE ALTER DATABASE 用于修改指定或当前数据库的默认字符集和排序规则。ALTER SCHEMA 跟 ALTER DATABASE 操作效果一样。 语法图 AlterDatabaseStmt ::= 'AL...

描述 格式 参数解释 示例 描述 该语句用于删除放在回收站的数据库。 格式 PURGE DATABASE object_name ; 参数解释 参数 描述 object_name 对象进入回收站后的新名字 示例 删除放在回收站的数据库 __recycle_$_1_1597384386029184。 Oc...