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查询表的备注信息：
SELECT TABLE_NAME, TABLE_TYPE, COMMENTS FROM USER_TAB_COMMENTS WHERE TABLE_NAME = ‘MR_DEPT;
查询字段的备注信息：
SELECT TABLE_NAME, COLUMN_NAME, COMMENTS FROM USER_COL_COMMENTS WHERE TABLE_NAME = ‘SFA_STOCK_REQUEST‘
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原文地址：http://www.cnblogs.com/sprinng/p/4535671.html
