“DROP SCHEMA”是一个SQL命令,用于删除某个数据库模式及其所有内容。使用此命令时,所有数据表、视图、存储过程等都将被删除,且无法恢复。执行该命令的基本语法如下: DROPSCHEMAschema_name; 1. 在这里,schema_name是要删除的数据库名称。 注意:执行此命令将不可逆转,因此必须谨慎使用。 误操作的后果 当误操作执行...
Query OK, 0 rows affected (0.04 sec)mysql> DROP SCHEMA db_test2; #输入删除数据库语句。Query OK, 0 rows affected (0.01 sec)mysql> DROP SCHEMA IF EXISTS db_test3; #输入删除数据库语句。Query OK, 0 rows affected (0.01 sec)mysql> SHOW DATABASES;+———–+| Database |+———–+|...
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华为云帮助中心为你分享云计算行业信息,包含产品介绍、用户指南、开发指南、最佳实践和常见问题等文档,方便快速查找定位问题与能力成长,并提供相关资料和解决方案。本页面关键词:mysql显示schema定义。
My task was to clear the data in the database. I first started with some simple delete statements, but those were taking a long time, so I cancelled them and decided it would be faster to simply drop the schema and recreate it from a script I have. So from MySQL Administrator, I ...
Documents in Tables X Plugin InnoDB Cluster InnoDB ReplicaSet MySQL NDB Cluster 8.0 Partitioning Stored Objects INFORMATION_SCHEMA Tables MySQL Performance Schema MySQL sys Schema Connectors and APIs MySQL Enterprise Edition MySQL Workbench MySQL on OCI Marketplace MySQL 8.0 Frequently...
mysql-js>db If the schema value is notSchema:world_x, then set thedbvariable by issuing: mysql-js>\use world_x Create a Collection To create a new collection in an existing schema, use thedbobject'screateCollection()method. The following example creates a collection calledflagsin theworl...
( schema.ForeignKeyConstraint, schema.PrimaryKeyConstraint, schema.UniqueConstraint, ), ): return compiler.visit_drop_constraint(element, **kw) elif isinstance(constraint, schema.CheckConstraint): # note that SQLAlchemy as of 1.2 does not yet support # DROP CONSTRAINT for MySQL/MariaDB, so we ...
mysql>DROP PROCEDURE ShowStuScore; Query OK,0rows affected (0.08sec) 删除后,可以通过查询 information_schema 数据库下的 routines 表来确认上面的删除是否成功。SQL 语句和运行结果如下: mysql> SELECT * FROM information_schema.routines WHERE routine_name='ShowStuScore'; ...