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)
|
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
