【推荐】Oracle导出所有表结构
【背景说明】
最近在帮同事维护OA系统，需要查看Oracle数据库的所有表结构，又不想一个一个表的导出建表语句。搜到这个，于是和大家分享一下：）
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【Oracle导出所有表结构SQL】
（说明：此SQL语句是通用的，直接可以拿来用，爽！当然若有额外需求，请根据实际情况修改）
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SELECT B.TABLE_NAME AS "表名", C.COMMENTS AS "表说明", B.COLUMN_ID AS "字段序号", B.COLUMN_NAME AS "字段名", B.DATA_TYPE AS "字段数据类型", B.DATA_LENGTH AS "数据长度", B.DATA_PRECISION AS "整数位", B.DATA_SCALE AS "小数位", A.COMMENTS AS "字段说明" FROM ALL_COL_COMMENTS A, ALL_TAB_COLUMNS B, ALL_TAB_COMMENTS C WHERE A.TABLE_NAME IN (SELECT U.TABLE_NAME FROM USER_ALL_TABLES U) AND A.OWNER = B.OWNER AND A.TABLE_NAME = B.TABLE_NAME AND A.COLUMN_NAME = B.COLUMN_NAME AND C.TABLE_NAME = A.TABLE_NAME AND C.OWNER = A.OWNER ORDER BY A.TABLE_NAME, B.COLUMN_ID
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