| Siebel Analytics Web Administration Guide > Working with Data and Managing the Web Catalog Using Siebel Analytics Web SOAP API > Description of Structures in the Siebel Analytics Web SOAP API > SAColumn Structure
 The SAColumn structure represents the logical column in the Subject Area. This structure is used in the MetadataService. Table 34 lists the fields in this structure. 
Table 34.	SAColumn Structure Fields
    |  |  |  
    | String name | Column name used in SQL statements. |  
    | String displayName | Localized name, used in the Answers screen. |  
    | String description | A string to contain the description of the column name. |  
    | boolean nullable | Flag to indicate if the column is nullable or not. |  
    | SADataType dataType | Indicates the type of data a column contains. For more information, see SADataType Values. |  
    | boolean aggregateable | Flag to indicate if the column can be aggregated or not. |  
    | AggregationRule aggrRule | If the column contains aggregated data, this value indicates the type of aggregation used. For more information, see AggregationRule Values. |  
 SADataType ValuesThe SADataType indicates the type of data a column contains. The following list shows the data types available: BigInt
Binary
Bit
Char
Coordinate
Date
Decimal
Double
Float
Integer
Invalid
LongVarBinary
LongVarChar
Numeric
Real
SmallInt
Time
TimeStamp
TinyInt
Unknown
VarBinary
VarChar
 AggregationRule ValuesThe SADataType specifies the default aggregation rule for the column. For details on aggregation functions, see Siebel Analytics Web Administration Guide. The following list shows the aggregation functions available: Avg
BottomN
Complex
Count
CountDistinct
CountStar
DimensionAggr
First
Last
Max
Min
None
Percentile
Rank
ServerDefault
SubTotal
Sum
TopN
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