您将使用这些命令来创建、读取、更新或者删除数据库中的记录。
You will use these commands to create, read, update, or delete records from your database.
然而，索引要么增加要么减少了添加，变更，以及删除数据库记录的操作执行。
However, indexes can either increase or decrease the performance of operations to add, change, and delete database records.
在每次测试运行之后便删除数据库person表中的所有记录。
All the records in the database PERSON table were deleted after each test run.
我们可以使用DELETE命令来删除数据库表单中的一条记录。
We may use the SQL delete command to delete a record in a table in a database.
我们可以使用DELETE命令来删除数据库表单中的一条记录。
We may use the SQL delete command to delete a record in a table in a database.
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