DurationLabel：如果分区键列的数据类型是日期、时间或时间戳，这个参数指定与Constan t值相关的时间单位。
DurationLabel: Identifies the duration that is associated with the Constant value specified if the partitioning key column has been assigned a date, time, or time stamp data type.
当使用VARCHAR或VARGRAPHIC数据类型时，索引键限制可能减少。
The index key limit might be reduced when you are using VARCHAR or VARGRAPHIC data type.
键并不限制为整数；它可以是任何不易变的数据类型，包括integer、float、tuple或string。
The key isn't restricted to being an integer; it can be any nonmutable data type, including an integer, float, tuple, or string.
在ASBO中定义了诸如缺省值、键和非键属性、大小和数据类型之类的信息。
Information such as default value, key and non-key attributes, size and data types is defined in an ASBO.
对于创建外键，则需要另外一个具有主键的表，且该主键具有兼容的数据类型。
For foreign key creation, another table with a primary key with a compatible data type is required.
如这个例子所示，可以在一个dictionary中使用不同数据类型的键和数据值。
As this example shows, you can have different data types for the keys and the data values in a dictionary.
通过在将fact表中的外键与dimension 表中的主键进行连接时采用like数据类型（例如 INT32 to INT32），可提高查询性能。
Query performance can be improved by leveraging like data types (i.e. INT32 to INT32) when joining foreign keys in a fact table to primary keys in a dimension table.
主键列、外键列和索引上使用的列的数据类型。
Data type of primary key columns, foreign key columns, and columns used on indexes.
其中至少应该包含每个字段的数据类型和在每个表内的主外键。
The data type that should include every field at least among them and inside every watch advocate external key.
字典的值可以是任何类型的，但必须是一个不可改变的数据类型，如字符串，数字，或元组键。
The values of a dictionary can be of any type, but the keys must be of an immutable data type such as strings, Numbers, or tuples.
字典的值可以是任何类型的，但必须是一个不可改变的数据类型，如字符串，数字，或元组键。
The values of a dictionary can be of any type, but the keys must be of an immutable data type such as strings, Numbers, or tuples.
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