Each row in the sysindexcolumn system table describes a column of an index listed in sysindex.
| Column name | Column type | Description |
|---|---|---|
| table_id | INTEGER | A unique identifier for the table to which the index applies. |
| index_id | INTEGER | A unique identifier for the index that this index-column belongs to. |
| order | INTEGER | The order of the column in the index. |
| column_id | INTEGER | A unique identifier for the column being indexed. |
| index_column_flag | TINY | An indication of where the column in the index is kept, either in ascending (1) or descending (0) order. |
PRIMARY KEY (table_id, index_id, order)
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