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Merge branch 'ithangzhou-patch-17' into ithangzhou-fix-symlinks-2
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commit
61c46cbc55
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---
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machine_translated: true
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machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
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toc_priority: 38
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toc_title: SHOW
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---
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# 显示查询 {#show-queries}
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# SHOW 查询 {#show-queries}
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## SHOW CREATE TABLE {#show-create-table}
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``` sql
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SHOW CREATE [TEMPORARY] [TABLE|DICTIONARY] [db.]table [INTO OUTFILE filename] [FORMAT format]
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```
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返回单个字符串类型的 ‘statement’列,其中只包含了一个值 - 用来创建指定对象的 `CREATE` 语句。
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返回单 `String`-类型 ‘statement’ column, which contains a single value – the `CREATE` 用于创建指定对象的查询。
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## SHOW DATABASES {#show-databases}
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@ -21,8 +19,7 @@ SHOW CREATE [TEMPORARY] [TABLE|DICTIONARY] [db.]table [INTO OUTFILE filename] [F
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SHOW DATABASES [INTO OUTFILE filename] [FORMAT format]
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```
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打印所有数据库的列表。
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这个查询是相同的 `SELECT name FROM system.databases [INTO OUTFILE filename] [FORMAT format]`.
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打印所有的数据库列表,该查询等同于 `SELECT name FROM system.databases [INTO OUTFILE filename] [FORMAT format]`
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## SHOW PROCESSLIST {#show-processlist}
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@ -30,11 +27,13 @@ SHOW DATABASES [INTO OUTFILE filename] [FORMAT format]
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SHOW PROCESSLIST [INTO OUTFILE filename] [FORMAT format]
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```
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输出的内容 [系统。流程](../../operations/system-tables.md#system_tables-processes) 表,包含目前正在处理的查询列表,除了 `SHOW PROCESSLIST` 查询。
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输出 [system.processes](../../operations/system-tables/processes.md#system_tables-processes)表的内容,包含有当前正在处理的请求列表,除了 `SHOW PROCESSLIST`查询。
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该 `SELECT * FROM system.processes` 查询返回有关所有当前查询的数据。
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提示(在控制台中执行):
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`SELECT * FROM system.processes` 查询返回和当前请求相关的所有数据
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提示 (在控制台执行):
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``` bash
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$ watch -n1 "clickhouse-client --query='SHOW PROCESSLIST'"
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@ -42,15 +41,15 @@ $ watch -n1 "clickhouse-client --query='SHOW PROCESSLIST'"
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## SHOW TABLES {#show-tables}
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显示表的列表。
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显示表的清单
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``` sql
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SHOW [TEMPORARY] TABLES [{FROM | IN} <db>] [LIKE '<pattern>' | WHERE expr] [LIMIT <N>] [INTO OUTFILE <filename>] [FORMAT <format>]
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```
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如果 `FROM` 如果未指定子句,则查询返回当前数据库中的表列表。
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如果未使用 `FROM` 字句,该查询返回当前数据库的所有表清单
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你可以得到相同的结果 `SHOW TABLES` 通过以下方式进行查询:
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可以用下面的方式获得和 `SHOW TABLES`一样的结果:
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``` sql
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SELECT name FROM system.tables WHERE database = <db> [AND name LIKE <pattern>] [LIMIT <N>] [INTO OUTFILE <filename>] [FORMAT <format>]
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@ -58,7 +57,7 @@ SELECT name FROM system.tables WHERE database = <db> [AND name LIKE <pattern>] [
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**示例**
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下面的查询从表的列表中选择前两行 `system` 数据库,其名称包含 `co`.
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下列查询获取最前面的2个位于`system`库中且表名包含 `co`的表。
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``` sql
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SHOW TABLES FROM system LIKE '%co%' LIMIT 2
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@ -73,15 +72,15 @@ SHOW TABLES FROM system LIKE '%co%' LIMIT 2
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## SHOW DICTIONARIES {#show-dictionaries}
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显示列表 [外部字典](../../sql-reference/dictionaries/external-dictionaries/external-dicts.md).
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以列表形式显示 [外部字典](../../sql-reference/dictionaries/external-dictionaries/external-dicts.md).
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``` sql
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SHOW DICTIONARIES [FROM <db>] [LIKE '<pattern>'] [LIMIT <N>] [INTO OUTFILE <filename>] [FORMAT <format>]
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```
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如果 `FROM` 如果未指定子句,则查询从当前数据库返回字典列表。
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如果 `FROM`字句没有指定,返回当前数据库的字典列表
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你可以得到相同的结果 `SHOW DICTIONARIES` 通过以下方式进行查询:
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可以通过下面的查询获取和 `SHOW DICTIONARIES`相同的结果:
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``` sql
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SELECT name FROM system.dictionaries WHERE database = <db> [AND name LIKE <pattern>] [LIMIT <N>] [INTO OUTFILE <filename>] [FORMAT <format>]
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@ -89,7 +88,7 @@ SELECT name FROM system.dictionaries WHERE database = <db> [AND name LIKE <patte
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**示例**
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下面的查询从表的列表中选择前两行 `system` 数据库,其名称包含 `reg`.
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下列查询获取最前面的2个位于 `system`库中且名称包含 `reg`的字典表。
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``` sql
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SHOW DICTIONARIES FROM db LIKE '%reg%' LIMIT 2
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@ -104,7 +103,7 @@ SHOW DICTIONARIES FROM db LIKE '%reg%' LIMIT 2
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## SHOW GRANTS {#show-grants-statement}
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显示用户的权限。
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显示用户的权限
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### 语法 {#show-grants-syntax}
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@ -112,13 +111,13 @@ SHOW DICTIONARIES FROM db LIKE '%reg%' LIMIT 2
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SHOW GRANTS [FOR user]
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```
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如果未指定user,则查询返回当前用户的权限。
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如果未指定用户,输出当前用户的权限
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## SHOW CREATE USER {#show-create-user-statement}
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显示了在使用的参数 [用户创建](create.md#create-user-statement).
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显示 [user creation](../../sql-reference/statements/create.md#create-user-statement)用到的参数。
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`SHOW CREATE USER` 不输出用户密码。
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`SHOW CREATE USER` 不会输出用户的密码信息
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### 语法 {#show-create-user-syntax}
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@ -128,7 +127,7 @@ SHOW CREATE USER [name | CURRENT_USER]
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## SHOW CREATE ROLE {#show-create-role-statement}
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显示了在使用的参数 [角色创建](create.md#create-role-statement)
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显示 [role creation](../../sql-reference/statements/create.md#create-role-statement) 中用到的参数。
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### 语法 {#show-create-role-syntax}
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@ -138,7 +137,7 @@ SHOW CREATE ROLE name
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## SHOW CREATE ROW POLICY {#show-create-row-policy-statement}
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显示了在使用的参数 [创建行策略](create.md#create-row-policy-statement)
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显示 [row policy creation](../../sql-reference/statements/create.md#create-row-policy-statement)中用到的参数
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### 语法 {#show-create-row-policy-syntax}
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@ -148,7 +147,7 @@ SHOW CREATE [ROW] POLICY name ON [database.]table
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## SHOW CREATE QUOTA {#show-create-quota-statement}
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显示了在使用的参数 [创建配额](create.md#create-quota-statement)
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显示 [quota creation](../../sql-reference/statements/create.md#create-quota-statement)中用到的参数
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### 语法 {#show-create-row-policy-syntax}
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@ -158,7 +157,7 @@ SHOW CREATE QUOTA [name | CURRENT]
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## SHOW CREATE SETTINGS PROFILE {#show-create-settings-profile-statement}
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显示了在使用的参数 [设置配置文件创建](create.md#create-settings-profile-statement)
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显示 [settings profile creation](../../sql-reference/statements/create.md#create-settings-profile-statement)中用到的参数
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### 语法 {#show-create-row-policy-syntax}
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@ -166,4 +165,4 @@ SHOW CREATE QUOTA [name | CURRENT]
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SHOW CREATE [SETTINGS] PROFILE name
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```
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[原始文章](https://clickhouse.tech/docs/en/query_language/show/) <!--hide-->
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[原始文档](https://clickhouse.tech/docs/en/query_language/show/) <!--hide-->
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