DELETE DATABASE DatabaseName | ? [DELETETABLES] [RECYCLE] Parameters DatabaseName Specifies the name of the database to delete from disk. The database you specify cannot be open. DatabaseName can include the p
3. Choose the Database to Delete Once you've confirmed the database you want to delete, you can switch to that database using the following command: USE database_name; Replace database_name with the name of the database you want to delete. 4. Delete the Database Now comes the criti...
DELETE Command DELETE CONNECTION Command DELETE DATABASE Command DELETE FILE Command DELETE TAG Command DELETE TRIGGER Command DELETE VIEW Command DIMENSION Command DIR or DIRECTORY Command DISPLAY Command DISPLAY CONNECTIONS Command DISPLAY DATABASE Command DISPLAY DLLS Command DISPLAY FILES Command DISPLAY ...
This command removes the database and also removes the directory and files on the database server for the database. Just like the other databases here, there is no MySQL “delete database” command specifically, but the Drop Database command is used to drop or delete a database. PostgreSQL...
CLOSE DATABASES OPEN DATABASE (HOME(2) + 'Data\testdata') USE customer && Opens Customer table DELETE FOR country = 'USA' && Mark for deletion CLEAR LIST FIELDS company, country FOR DELETED( ) && List marked records RECALL ALL && Unmark all records marked for deletion ...
Deletes the database contents and log files for the database, uncatalogs the database, and deletes the database subdirectory.
In Amazon QLDB, use the DELETE command to mark an active document as deleted in a table by creating a new, but final revision of the document. This final revision indicates that the document is deleted. This operation ends the lifecycle of a document, wh
SqlConnection("Server=localhost; database=yourdatabase;uid=sa;pwd=sa"); (2) 建立SqlCommand对象 SqlCommand mysqlcommand...=mysqlconnection.CreateCommand(); (3) 设置Sql...
CLOSE DATABASES CLEAR OPEN DATABASE HOME(2)+"Data\testdata" USE customer && Open Customer table DELETE FROM customer WHERE country = "USA" && Mark for deletion CLEAR LIST FIELDS company, country FOR DELETED( ) && List marked records * If the file were packed at this point the records wou...
注意:对于 UPDATE、INSERT 和 DELETE 语句,返回值为该命令所影响的行数。 对于其他所有类型的语句,返回值 为 -1。 ExecuteReader:执行查询,并返回一个 DataReader 对象。ExecuteScalar:执行查询,并返回查询结果集中第一行的第一列(object类型)。如果找不到结果集中第一行的第一列,则返回 null 引用。