可通过用针对外键的默认值来填充fact表，来将外部连接转换为内部连接。
Outer joins can be converted to inner joins by augmenting fact tables with default values for foreign keys.
为了从表中检索结构化类型数据，必须有一些将类型转换成一个标量值，换句话说，这些值的类型必须基于某种内置的DB2 数据类型。
To retrieve structured type data from a table, there must be some way to convert that type into a single scalar value whose type, in turn, must be based on one of the built-in DB2 data types.
在调用存储过程时，并没有将转换表中的实际值传递给存储过程，而是只传递了一个单值。
When a stored procedure is invoked, the actual values in the transition table are not passed to the stored procedure. A single value is passed instead.
这些表是用于在不同代码页之间转换值的外部代码页转换表。
These tables are the external code page conversion tables used to translate values between various code pages.
这个单值是转换表的定位器，存储过程用它来访问转换表的列。
This single value is a locator to the transition table, which the procedure USES to access the transition table columns.
因此，如果值blue、red和green是有效的，则可以用样式表转换模式以生成一个新的模式。
So, if the values blue, red, and green, are valid, you can transform your schema with our style sheet to generate a new schema.
values子句还为用户指定的oid列的值包括了一个casting函数，因为该值必须强制转换成目标表的REFERENCE类型。
The VALUES clause also includes a casting function for the user-specified value of the OID column because the value must be cast into the REFERENCE type of the target table.
然后这个数组被翻转(所以现在先前的键跟在值的后面)并重新转换为一个哈希表。
This array is then reversed (so that now the former keys follow their values) and transformed back into a hash.
串的转换先计算所包括的表达式表的值，然后按照其结果类型所特定的规则转换其结果对象为字符串。
A string conversion evaluates the contained expression list and converts the resulting object into a string according to rules specific to its type.
如果值来自于数据库表，则必须转换为相应的类型。
When the values come in from the database table, they must be converted to the appropriate type.
如果值来自于数据库表，则必须转换为相应的类型。
When the values come in from the database table, they must be converted to the appropriate type.
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