To drop a database in SQL Server, use the Drop Database command: DROPDATABASE[IFEXISTS]{database_name|database_snapshot_name}; You can run this when you are connected to your server. The IF EXISTS keyword is optional and will drop the database if it exists. If the database does not...
The DROP command removes all the objects stored in the database and database from the SQL server. The DROP query removes the database permanently from the SQL Server. If tables and views stored in the database are important for you, then the data backup needs to be kept in another datab...
SQL建立数据库及删除数据库命令,需要使用sqlserver的朋友可以参考下。 代码如下: CREATE DATABASE 临时的 ON ( NAME='临时的_Data', FILENAME='h:\临时的.mdf', SIZE=5MB, MAXSIZE=50MB, FILEGROWTH=10% ) LOG ON ( NAME='临时的_LOG', FILENAME='h:\临时的.ldf', ...
Azure SQL Database 您可以透過 T-SQL 查詢動態管理檢視來監視工作負載效能並診斷效能問題,這可能是因為封鎖或長時間執行的查詢、資源瓶頸、次佳查詢計劃等所造成。 如需圖形化查詢資源監視,請使用 查詢存放區。 提示 請考慮 自動調整資料庫,以自動改善查詢效能。 監視資源使用量 您可以使用下列 DMV 來監視資料庫...
create database jack; use jack; create table kaven ( id integer auto_increment, primary key PRIMARY_KEY(id) ); lock tables kaven as kv read local; create database jack2; 1. 2. 3. 4. 5. 6. 7. 8. Can’t execute the given command because you have active locked tables or an acti...
DROP TABLE table_name To delete a database: 要删除一个数据库的话可以这样写: DROP DATABASE database_name --- Truncate a Table 截表 What if we only want to get rid of the data inside a table, and not the table itself? Use the TRUNCATE...
ALTER TABLE table_nameDROP INDEX index_name; DROP DATABASEThe DROP DATABASE command is used is to delete an existing SQL database.The following SQL drops a database named "testDB":Example DROP DATABASE testDB; Note: Be careful before dropping a database. Deleting a database will result ...
The following SQL statement drops the existing database "testDB": ExampleGet your own SQL Server DROPDATABASEtestDB; Tip:Make sure you have admin privilege before dropping any database. Once a database is dropped, you can check it in the list of databases with the following SQL command:SHO...
DROP DATABASE School; TRUNCATE The SQL TRUNCATE command is used to delete all the records/rows from the table without affecting the schema and structure of the database. The TRUNCATE Command is a Data Definition Language (DDL) command. This command cannot be used to delete a single row in ...
DROP AGGREGATE — 删除一个用户定义的聚集函数 DROP CAST — 删除一个用户定义的类型转换 DROP CONVERSION — 删除一个用户定义的编码转换 DROP DATABASE — 删除一个数据库 DROP DOMAIN — 删除一个用户定义的域 DROP FUNCTION — 删除一个函数 DROP GROUP — 删除一个用户组 ...