可以说，由于现实中的RDBMS常常包含需要保留的数据，仅仅删除模式然后通过DDL语句重新构建模式不是正确的选择。
Suffice it to say that because a real-world RDBMS frequently contains data that needs to be preserved, just dropping the schema and rebuilding it from DDL statements is not an option.
IBMDB 2使程序员可以用熟悉的sql语句更新和删除XML数据。
IBM DB2 enables programmers to update and delete XML data using familiar SQL statements.
其中嵌入了应对没有可供删除的数据这种情况的异常处理语句，使得程序更健壮一点。
The program has nested exception handling to deal with situations in which it looks up nonexistent data to delete, making the program a bit more robust.
如果不需要保留所收集的锁事件数据用作将来的分析，必须使用DROPtable语句手动删除非格式化事件表，如清单22所示。
If the collected lock event data should not be kept for further analysis purposes, the unformatted event table must be dropped manually using the drop table statement, as shown in Listing 22.
要更新和删除存储在DB 2中的XML数据，可使用SQLUPDATE和delete语句。
To update and delete XML data stored in DB2, you use SQL update and delete statements.
讨论的第一种数据修改技术是数据删除，这通过使用SQLdelete语句来执行。
The first data modification technique discussed was data deletion, which is performed by using the SQL DELETE statement.
每当针对一个其中定义了昵称的MQT调用refresh语句时，该语句会删除MQT中预先存在的任何数据并重新用数据进行填充。
When a REFRESH statement is invoked for an MQT defined with nicknames in it, it deletes any pre-existing data in the MQT and populates the data afresh.
注意，删除绑定包中的一个或多个语句引用的一个列将使数据库上的包无效。
Note that dropping a column that is referenced by one or more statements in bound packages invalidates the packages on the database.
本文介绍SQLDELETE和UPDATE语句，您可以使用它们有选择地删除或修改ApacheDerby数据库中的现有数据。
This article introduces the SQL DELETE and UPDATE statements, which you can use to selectively delete or modify existing data in an Apache Derby database.
如果更正措施是删除有问题的行数据，那么使用BEGINWORKWITHOUT replication语句删除行。
If the correction is to delete the problematic row data, delete the row using the BEGIN WORK WITHOUT REPLICATION statement.
求得的语句，也被称为 三元组（triple），被自动添加到RDF数据库（被称作模型）中，或从其中删除。
The resulting statements, also known as triples, are automatically added and removed from the RDF database (known as the model).
求得的语句，也被称为 三元组（triple），被自动添加到RDF数据库（被称作模型）中，或从其中删除。
The resulting statements, also known as triples, are automatically added and removed from the RDF database (known as the model).
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