sys_tablecolumns
Describes the columns of the available tables and views.
The following query returns the columns and data types for the SampleTable_1 table:
SELECT ColumnName, DataTypeName FROM sys_tablecolumns WHERE TableName='SampleTable_1'
Columns
| Name | Type | Description |
| CatalogName | String | The name of the database containing the table or view. |
| SchemaName | String | The schema containing the table or view. |
| TableName | String | The name of the table or view containing the column. |
| ColumnName | String | The column name. |
| DataTypeName | String | The data type name. |
| DataType | Int32 | An integer indicating the data type. This value is determined at run time based on the environment. |
| Length | Int32 | The storage size of the column. |
| DisplaySize | Int32 | The designated column's normal maximum width in characters. |
| NumericPrecision | Int32 | The maximum number of digits in numeric data. The column length in characters for character and date-time data. |
| NumericScale | Int32 | The column scale or number of digits to the right of the decimal point. |
| IsNullable | Boolean | Whether the column can contain null. |
| Description | String | A brief description of the column. |
| Ordinal | Int32 | The sequence number of the column. |
| IsAutoIncrement | String | Whether the column value is assigned in fixed increments. |
| IsGeneratedColumn | String | Whether the column is generated. |
| IsHidden | Boolean | Whether the column is hidden. |
| IsArray | Boolean | Whether the column is an array. |
| IsReadOnly | Boolean | Whether the column is read-only. |
| IsKey | Boolean | Indicates whether a field returned from sys_tablecolumns is the primary key of the table. |
| ColumnType | String | The role or classification of the column in the schema. Possible values include SYSTEM, LINKEDCOLUMN, NAVIGATIONKEY, REFERENCECOLUMN, and NAVIGATIONPARENTCOLUMN. |
| FieldControl | String | Indicates whether the column is read-only, mandatory, or optional. For tables and views retrieved from an OData v4 service, this can be 'Read Only', 'Hide', 'Mandatory', or 'Optional'. For tables and views retrieved from an OData v2 service, this field returns 'Mandatory' for all non-nullable fields and NULL for all nullable fields. |