[フル]列を表示
ステートメントSHOW [FULL] COLUMNS FROM <table_name>は、テーブルまたはビューの列を便利な表形式で記述します。オプションのキーワードFULLは、現在のユーザーがその列に対して持つ特権を表示し、 commentはテーブル定義から表示します。
ステートメントSHOW [FULL] FIELDS FROM <table_name> 、およびDESCRIBE <table_name>は、このEXPLAIN <table_name>のエイリアスDESC <table_name> 。
ノート：
DESC TABLE <table_name>、およびDESCRIBE TABLE <table_name>は、上記のステートメントとEXPLAIN TABLE <table_name>ではありません。それらはDESC SELECT * FROM <table_name>のエイリアスです。
あらすじ
ShowStmt：
ShowColumnsFilterable：
OptFull：
FieldsOrColumns：
ShowTableAliasOpt：
FromOrIn：
TableName：
ShowDatabaseNameOpt：
DBName：
ShowLikeOrWhereOpt：
例
mysql> create view v1 as select 1;
Query OK, 0 rows affected (0.11 sec)
mysql> show columns from v1;
+-------+-----------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-----------+------+------+---------+-------+
| 1 | bigint(1) | YES | | NULL | |
+-------+-----------+------+------+---------+-------+
1 row in set (0.00 sec)
mysql> desc v1;
+-------+-----------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-----------+------+------+---------+-------+
| 1 | bigint(1) | YES | | NULL | |
+-------+-----------+------+------+---------+-------+
1 row in set (0.00 sec)
mysql> describe v1;
+-------+-----------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-----------+------+------+---------+-------+
| 1 | bigint(1) | YES | | NULL | |
+-------+-----------+------+------+---------+-------+
1 row in set (0.00 sec)
mysql> explain v1;
+-------+-----------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-----------+------+------+---------+-------+
| 1 | bigint(1) | YES | | NULL | |
+-------+-----------+------+------+---------+-------+
1 row in set (0.00 sec)
mysql> show fields from v1;
+-------+-----------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-----------+------+------+---------+-------+
| 1 | bigint(1) | YES | | NULL | |
+-------+-----------+------+------+---------+-------+
1 row in set (0.00 sec)
mysql> show full columns from v1;
+-------+-----------+-----------+------+------+---------+-------+---------------------------------+---------+
| Field | Type | Collation | Null | Key | Default | Extra | Privileges | Comment |
+-------+-----------+-----------+------+------+---------+-------+---------------------------------+---------+
| 1 | bigint(1) | NULL | YES | | NULL | | select,insert,update,references | |
+-------+-----------+-----------+------+------+---------+-------+---------------------------------+---------+
1 row in set (0.00 sec)
mysql> show full columns from mysql.user;
+-----------------------+---------------+-------------+------+------+---------+-------+---------------------------------+---------+
| Field | Type | Collation | Null | Key | Default | Extra | Privileges | Comment |
+-----------------------+---------------+-------------+------+------+---------+-------+---------------------------------+---------+
| Host | char(64) | utf8mb4_bin | NO | PRI | NULL | | select,insert,update,references | |
| User | char(32) | utf8mb4_bin | NO | PRI | NULL | | select,insert,update,references | |
| authentication_string | text | utf8mb4_bin | YES | | NULL | | select,insert,update,references | |
| Select_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Insert_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Update_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Delete_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Create_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Drop_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Process_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Grant_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| References_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Alter_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Show_db_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Super_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Create_tmp_table_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Lock_tables_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Execute_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Create_view_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Show_view_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Create_routine_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Alter_routine_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Index_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Create_user_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Event_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Trigger_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Create_role_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Drop_role_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Account_locked | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Shutdown_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Reload_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| FILE_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
| Config_priv | enum('N','Y') | utf8mb4_bin | NO | | N | | select,insert,update,references | |
+-----------------------+---------------+-------------+------+------+---------+-------+---------------------------------+---------+
33 rows in set (0.01 sec)
MySQLの互換性
このステートメントは、MySQLと完全に互換性があると理解されています。互換性の違いは、GitHubでは問題を介して報告である必要があります。