MySQL show 詳解
阿新 • • 發佈:2019-01-09
1> show tables 或 show tables from database_name : 顯示當前資料庫中所有表的名稱mysql> show tables;+----------------+| Tables_in_test |+----------------+| article || article2 || t_base || t_hash || t_list || t_range |+----------------+6 rows in set (0.00 sec)mysql> show tables from test;+----------------+| Tables_in_test |+----------------+ | article || article2 || t_base || t_hash || t_list || t_range |+----------------+6 rows in set (0.00 sec)2> show databases : 顯示 MySQL 中所有資料庫的名稱mysql> show tables from test;+----------------+| Tables_in_test |+----------------+| article || article2 | | t_base || t_hash || t_list || t_range |+----------------+6 rows in set (0.00 sec)3> show columns from table_name from database_name; 或show columns from database_name.table_name : 顯示錶中列名稱4> show grants for user_name : 顯示一個使用者的許可權,顯示結果類似於grant 命令mysql> show grants for test; +----------------------------------+| Grants for [email protected]% |+----------------------------------+| GRANT USAGE ON *.* TO 'test'@'%' |+----------------------------------+1 row in set (0.00 sec)5> show index from table_name : 顯示錶的索引mysql> show index from test_indx;+-----------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+| Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |+-----------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+| test_indx | 0 | PRIMARY | 1 | id | A | 0 | NULL | NULL | | BTREE | | || test_indx | 0 | name | 1 | name | A | 0 | NULL | NULL | | BTREE | | |+-----------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+2 rows in set (0.00 sec)6> show status : 顯示一些系統特定資源的資訊,例如,正在執行的執行緒數量mysql> show status;+-----------------------------------------------+--------------------------------------------------+| Variable_name | Value |+-----------------------------------------------+--------------------------------------------------+| Aborted_clients | 0 || Aborted_connects | 10326 || Binlog_cache_disk_use | 28 || Binlog_cache_use | 76 || Binlog_stmt_cache_disk_use | 0 || Binlog_stmt_cache_use | 13 || Bytes_received | 1206 || Bytes_sent | 34992 || Com_admin_commands | 0 || Com_assign_to_keycache | 0 || Com_alter_db | 0 || Com_alter_db_upgrade | 0 || Com_alter_event | 0 || Com_alter_function | 0 || Com_alter_instance | 0 || Com_alter_procedure | 0 || Com_alter_server | 0 || Com_alter_table | 0 || Com_alter_tablespace | 0 || Com_alter_user | 0 || Com_analyze | 0 || Com_begin | 0 || Com_binlog | 0 || Com_call_procedure | 0 || Com_change_db | 1 || Com_change_master | 0 || Com_change_repl_filter | 0 || Com_check | 0 || Com_checksum | 0 || Com_commit | 0 || Com_create_db | 0 || Com_create_event | 0 || Com_create_function | 0 || Com_create_index | 0 || Com_create_procedure | 0 || Com_create_server | 0 || Com_create_table | 1 || Com_create_trigger | 0 || Com_create_udf | 0 || Com_create_user | 0 || Com_create_view | 0 || Com_dealloc_sql | 0 || Com_delete | 0 || Com_delete_multi | 0 || Com_do | 0 || Com_drop_db | 0 || Com_drop_event | 0 || Com_drop_function | 0 || Com_drop_index | 0 || Com_drop_procedure | 0 || Com_drop_server | 0 || Com_drop_table | 0 || Com_drop_trigger | 0 || Com_drop_user | 0 || Com_drop_view | 0 || Com_empty_query | 0 || Com_execute_sql | 0 || Com_explain_other | 0 || Com_flush | 0 || Com_get_diagnostics | 0 || Com_grant | 0 || Com_ha_close | 0 || Com_ha_open | 0 || Com_ha_read | 0 || Com_help | 0 || Com_insert | 0 || Com_insert_select | 0 || Com_install_plugin | 0 || Com_kill | 0 || Com_load | 0 || Com_lock_tables | 0 || Com_optimize | 0 || Com_preload_keys | 0 || Com_prepare_sql | 0 || Com_purge | 0 || Com_purge_before_date | 0 || Com_release_savepoint | 0 || Com_rename_table | 0 || Com_rename_user | 0 || Com_repair | 0 || Com_replace | 0 || Com_replace_select | 0 || Com_reset | 0 || Com_resignal | 0 || Com_revoke | 0 || Com_revoke_all | 0 || Com_rollback | 0 || Com_rollback_to_savepoint | 0 || Com_savepoint | 0 || Com_select | 3 || Com_set_option | 0 || Com_signal | 0 || Com_show_binlog_events | 0 || Com_show_binlogs | 0 || Com_show_charsets | 0 || Com_show_collations | 0 || Com_show_create_db | 0 || Com_show_create_event | 0 || Com_show_create_func | 0 || Com_show_create_proc | 0 || Com_show_create_table | 2 || Com_show_create_trigger | 0 || Com_show_databases | 1 || Com_show_engine_logs | 0 || Com_show_engine_mutex | 0 || Com_show_engine_status | 0 || Com_show_events | 0 || Com_show_errors | 1 || Com_show_fields | 11 || Com_show_function_code | 0 || Com_show_function_status | 0 || Com_show_grants | 1 || Com_show_keys | 2 || Com_show_master_status | 0 || Com_show_open_tables | 0 || Com_show_plugins | 0 || Com_show_privileges | 2 || Com_show_procedure_code | 0 || Com_show_procedure_status | 0 || Com_show_processlist | 0 || Com_show_profile | 0 || Com_show_profiles | 0 || Com_show_relaylog_events | 0 || Com_show_slave_hosts | 0 || Com_show_slave_status | 0 || Com_show_status | 1 || Com_show_storage_engines | 1 || Com_show_table_status | 1 || Com_show_tables | 5 || Com_show_triggers | 1 || Com_show_variables | 1 || Com_show_warnings | 0 || Com_show_create_user | 0 || Com_shutdown | 0 || Com_slave_start | 0 || Com_slave_stop | 0 || Com_group_replication_start | 0 || Com_group_replication_stop | 0 || Com_stmt_execute | 0 || Com_stmt_close | 0 || Com_stmt_fetch | 0 || Com_stmt_prepare | 0 || Com_stmt_reset | 0 || Com_stmt_send_long_data | 0 || Com_truncate | 0 || Com_uninstall_plugin | 0 || Com_unlock_tables | 0 || Com_update | 0 || Com_update_multi | 0 || Com_xa_commit | 0 || Com_xa_end | 0 || Com_xa_prepare | 0 || Com_xa_recover | 0 || Com_xa_rollback | 0 || Com_xa_start | 0 || Com_stmt_reprepare | 0 || Compression | OFF || Connection_errors_accept | 0 || Connection_errors_internal | 0 || Connection_errors_max_connections | 0 || Connection_errors_peer_address | 0 || Connection_errors_select | 0 || Connection_errors_tcpwrap | 0 || Connections | 10335 || Created_tmp_disk_tables | 6 || Created_tmp_files | 18 || Created_tmp_tables | 17 || Delayed_errors | 0 || Delayed_insert_threads | 0 || Delayed_writes | 0 || Flush_commands | 1 || Handler_commit | 0 || Handler_delete | 0 || Handler_discover | 0 || Handler_external_lock | 76 || Handler_mrr_init | 0 || Handler_prepare | 0 || Handler_read_first | 6 || Handler_read_key | 5 || Handler_read_last | 0 || Handler_read_next | 8 || Handler_read_prev | 0 || Handler_read_rnd | 0 || Handler_read_rnd_next | 1122 || Handler_rollback | 0 || Handler_savepoint | 0 || Handler_savepoint_rollback | 0 || Handler_update | 0 || Handler_write | 603 || Innodb_buffer_pool_dump_status | Dumping of buffer pool not started || Innodb_buffer_pool_load_status | Buffer pool(s) load completed at 180318 4:23:48 || Innodb_buffer_pool_resize_status | || Innodb_buffer_pool_pages_data | 7165 || Innodb_buffer_pool_bytes_data | 117391360 || Innodb_buffer_pool_pages_dirty | 0 || Innodb_buffer_pool_bytes_dirty | 0 || Innodb_buffer_pool_pages_flushed | 72097 || Innodb_buffer_pool_pages_free | 1024 || Innodb_buffer_pool_pages_misc | 2 || Innodb_buffer_pool_pages_total | 8191 || Innodb_buffer_pool_read_ahead_rnd | 0 || Innodb_buffer_pool_read_ahead | 35371 || Innodb_buffer_pool_read_ahead_evicted | 31 || Innodb_buffer_pool_read_requests | 77487902 || Innodb_buffer_pool_reads | 1564 || Innodb_buffer_pool_wait_free | 872 || Innodb_buffer_pool_write_requests | 38394848 || Innodb_data_fsyncs | 3254 || Innodb_data_pending_fsyncs | 0 || Innodb_data_pending_reads | 0 || Innodb_data_pending_writes | 0 || Innodb_data_read | 605213184 || Innodb_dat