查看表描述的命令 desc table_name 返回的是什么? 是一个结果集么?不能用 select * from (desc table_name), 那该怎么拿到表描述信息呢?(意思是我不是用来自己查看的,而是想取得所有表描述信息的内容, 包括主键值,列默认值等)如果不能直接从 desc table_name 中取值, 那该怎么取得完整的表描述信息用 ResultSetMetaData ,也貌似没有判断其是否是主键或者得到列默认值的方法?还是说需要那个系统表的辅助查询?希望大家帮帮忙~
调试欢乐多
select * from mysql.user这样处理返回的结果哈!
+-----------------+---------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+---------------------+------+-----+---------+-------+
| TABLE_CATALOG | varchar(512) | YES | | NULL | |
| TABLE_SCHEMA | varchar(64) | NO | | | |
| TABLE_NAME | varchar(64) | NO | | | |
| TABLE_TYPE | varchar(64) | NO | | | |
| ENGINE | varchar(64) | YES | | NULL | |
| VERSION | bigint(21) unsigned | YES | | NULL | |
| ROW_FORMAT | varchar(10) | YES | | NULL | |
| TABLE_ROWS | bigint(21) unsigned | YES | | NULL | |
| AVG_ROW_LENGTH | bigint(21) unsigned | YES | | NULL | |
| DATA_LENGTH | bigint(21) unsigned | YES | | NULL | |
| MAX_DATA_LENGTH | bigint(21) unsigned | YES | | NULL | |
| INDEX_LENGTH | bigint(21) unsigned | YES | | NULL | |
| DATA_FREE | bigint(21) unsigned | YES | | NULL | |
| AUTO_INCREMENT | bigint(21) unsigned | YES | | NULL | |
| CREATE_TIME | datetime | YES | | NULL | |
| UPDATE_TIME | datetime | YES | | NULL | |
| CHECK_TIME | datetime | YES | | NULL | |
| TABLE_COLLATION | varchar(32) | YES | | NULL | |
| CHECKSUM | bigint(21) unsigned | YES | | NULL | |
| CREATE_OPTIONS | varchar(255) | YES | | NULL | |
| TABLE_COMMENT | varchar(80) | NO | | | |
+-----------------+---------------------+------+-----+---------+-------+
21 rows in set (0.28 sec)mysql>
怎么我用 select * from (desc table_name); 有错?
mysql_query(.. "select * form ..那就怎么处理DESCmysql_query(.."desc tablename"