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* split up select.md * array-join.md basic refactoring * distinct.md basic refactoring * format.md basic refactoring * from.md basic refactoring * group-by.md basic refactoring * having.md basic refactoring * additional index.md refactoring * into-outfile.md basic refactoring * join.md basic refactoring * limit.md basic refactoring * limit-by.md basic refactoring * order-by.md basic refactoring * prewhere.md basic refactoring * adjust operators/index.md links * adjust sample.md links * adjust more links * adjust operatots links * fix some links * adjust aggregate function article titles * basic refactor of remaining select clauses * absolute paths in make_links.sh * run make_links.sh * remove old select.md locations * translate docs/es * translate docs/fr * translate docs/fa * remove old operators.md location * change operators.md links * adjust links in docs/es * adjust links in docs/es * minor texts adjustments * wip * update machine translations to use new links * fix changelog * es build fixes * get rid of some select.md links * temporary adjust ru links * temporary adjust more ru links * improve curly brace handling * adjust ru as well * fa build fix * ru link fixes * zh link fixes * temporary disable part of anchor checks
170 lines
4.4 KiB
Markdown
170 lines
4.4 KiB
Markdown
---
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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 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 `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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``` sql
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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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## SHOW PROCESSLIST {#show-processlist}
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``` sql
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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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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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``` bash
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$ watch -n1 "clickhouse-client --query='SHOW PROCESSLIST'"
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```
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## SHOW TABLES {#show-tables}
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显示表的列表。
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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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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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``` 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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```
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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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``` sql
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SHOW TABLES FROM system LIKE '%co%' LIMIT 2
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```
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``` text
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┌─name───────────────────────────┐
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│ aggregate_function_combinators │
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│ collations │
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└────────────────────────────────┘
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```
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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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``` 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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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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``` 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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```
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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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``` sql
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SHOW DICTIONARIES FROM db LIKE '%reg%' LIMIT 2
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```
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``` text
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┌─name─────────┐
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│ regions │
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│ region_names │
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└──────────────┘
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```
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## SHOW GRANTS {#show-grants-statement}
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显示用户的权限。
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### 语法 {#show-grants-syntax}
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``` sql
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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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## 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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`SHOW CREATE USER` 不输出用户密码。
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### 语法 {#show-create-user-syntax}
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``` sql
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SHOW CREATE USER [name | CURRENT_USER]
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```
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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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### 语法 {#show-create-role-syntax}
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``` sql
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SHOW CREATE ROLE name
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```
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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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### 语法 {#show-create-row-policy-syntax}
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``` sql
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SHOW CREATE [ROW] POLICY name ON [database.]table
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```
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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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### 语法 {#show-create-row-policy-syntax}
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``` sql
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SHOW CREATE QUOTA [name | CURRENT]
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```
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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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### 语法 {#show-create-row-policy-syntax}
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``` sql
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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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