SELECT
b.COLUMN_NAME AS column_name,
b.DATA_TYPE AS column_type,
A.COMMENTS AS column_comment
FROM
USER_TAB_COLUMNS b,
USER_COL_COMMENTS A
WHERE
b.TABLE_NAME = 'table_name'
AND b.TABLE_NAME = A .TABLE_NAME
AND b.COLUMN_NAME = A .COLUMN_NAME
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