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SELECT b.comments as 注释, a.column_name as 列名, a.data_type || '(' || a.data_length || ')' as 数据类型, a.nullable as 是否为空 FROM user_tab_columns a, user_col_comments b WHERE a.TABLE_NAME = '表名' and b.table_name = '表名' and a.column_name = b.column_name
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