mysql怎样查询所有表和字段信息
发布时间:12/01 来源:未知 浏览:
关键词:
mysql查询所有表和字段信息的办法:1、依据库名猎取所有表的信息【information_schema.`TABLES`】;2、依据库名猎取所有的字段信息【ORDINAL_POSITION AS '列的罗列次序'】。
mysql查询所有表和字段信息的办法:
1、依据库名猎取所有表的信息
SELECT * FROM information_schema.`TABLES` WHERE TABLE_SCHEMA = 'erp';
2、依据库名猎取所有表名称和表注明
SELECT TABLE_NAME, TABLE_COMMENT FROM information_schema.`TABLES` WHERE TABLE_SCHEMA = 'erp';
view:
3、依据库名猎取所有的字段信息
SELECT TABLE_SCHEMA AS '库名', TABLE_NAME AS '表名', COLUMN_NAME AS '列名', ORDINAL_POSITION AS '列的罗列次序', COLUMN_DEFAULT AS '默许值', IS_NULLABLE AS '可否为空', DATA_TYPE AS '数据类型', CHARACTER_MAXIMUM_LENGTH AS '字符最大长度', NUMERIC_PRECISION AS '数值精度(最大位数)', NUMERIC_SCALE AS '小数精度', COLUMN_TYPE AS 列类型, COLUMN_KEY 'KEY', EXTRA AS '额外注明', COLUMN_COMMENT AS '注释' FROM information_schema.`COLUMNS` WHERE TABLE_SCHEMA = 'erp' ORDER BY TABLE_NAME, ORDINAL_POSITION;
view:
4、依据库名猎取所有的库和表字段的根本信息
SELECT C.TABLE_SCHEMA AS '库名', T.TABLE_NAME AS '表名', T.TABLE_COMMENT AS '表注释', C.COLUMN_NAME AS '列名', C.COLUMN_COMMENT AS '列注释', C.ORDINAL_POSITION AS '列的罗列次序', C.COLUMN_DEFAULT AS '默许值', C.IS_NULLABLE AS '可否为空', C.DATA_TYPE AS '数据类型', C.CHARACTER_MAXIMUM_LENGTH AS '字符最大长度', C.NUMERIC_PRECISION AS '数值精度(最大位数)', C.NUMERIC_SCALE AS '小数精度', C.COLUMN_TYPE AS 列类型, C.COLUMN_KEY 'KEY', C.EXTRA AS '额外注明' FROM information_schema.`TABLES` T LEFT JOIN information_schema.`COLUMNS` C ON T.TABLE_NAME = C.TABLE_NAME AND T.TABLE_SCHEMA = C.TABLE_SCHEMA WHERE T.TABLE_SCHEMA = 'erp' ORDER BY C.TABLE_NAME, C.ORDINAL_POSITION;
view:
更多相干免费学习举荐:mysql教程(视频)
以上就是mysql怎样查询所有表和字段信息的细致内容,更多请关注 百分百源码网 其它相干文章!