SHOW COLUMNS FROM 数据表：显示数据表的属性，属性类型，主键信息，是否为NULL，默认值等其他信息。
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mysql> SHOW COLUMNS FROM runoob_tbl;+-----------------+--------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+-----------------+--------------+------+-----+---------+-------+| runoob_id | int(11) | NO | PRI | NULL | |
| runoob_title | varchar(255) | YES | | NULL | |
| runoob_author | varchar(255) | YES | | NULL | |
| submission_date | date | YES | | NULL | |+-----------------+--------------+------+-----+---------+-------+4 rows in set (0.01 sec)
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SHOW INDEX FROM 数据表：显示数据表的详细索引信息，包括PRIMARY KEY（主键）。
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mysql> SHOW INDEX FROM runoob_tbl;+------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+| Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |+------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+| runoob_tbl | 0 | PRIMARY | 1 | runoob_id | A | 2 | NULL | NULL | | BTREE | | |
+------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+1 row in set (0.00 sec)
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SHOW TABLE STATUS LIKE [FROM db_name] [LIKE 'pattern'] \G：该命令输出MySQL数据库管理系统的性能以及统计信息。
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mysql> SHOW TABLE STATUS FROM RUNOOB; # 显示数据库 RUNOOB 中所有表的信息mysql> SHOW TABLE STATUS from RUNOOB LIKE 'runoob%'; # 表名以runoob开头的表的信息
mysql> SHOW TABLE STATUS from RUNOOB LIKE 'runoob%'\G; # 加上 \G，查询结果按列打印
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本文转自lq201151CTO博客，原文链接： http://blog.51cto.com/liuqun/2044071，如需转载请自行联系原作者