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352 lines
9.6 KiB
Markdown
352 lines
9.6 KiB
Markdown
---
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toc_priority: 37
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toc_title: SHOW
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---
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# SHOW Statements {#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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Returns a single `String`-type ‘statement’ column, which contains a single value – the `CREATE` query used for creating the specified object.
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## SHOW DATABASES {#show-databases}
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Prints a list of all databases.
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```sql
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SHOW DATABASES [LIKE | ILIKE | NOT LIKE '<pattern>'] [LIMIT <N>] [INTO OUTFILE filename] [FORMAT format]
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```
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This statement is identical to the query:
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```sql
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SELECT name FROM system.databases [WHERE name LIKE | ILIKE | NOT LIKE '<pattern>'] [LIMIT <N>] [INTO OUTFILE filename] [FORMAT format]
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```
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### Examples {#examples}
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Getting database names, containing the symbols sequence 'de' in their names:
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``` sql
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SHOW DATABASES LIKE '%de%'
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```
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Result:
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``` text
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┌─name────┐
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│ default │
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└─────────┘
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```
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Getting database names, containing symbols sequence 'de' in their names, in the case insensitive manner:
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``` sql
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SHOW DATABASES ILIKE '%DE%'
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```
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Result:
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``` text
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┌─name────┐
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│ default │
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└─────────┘
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```
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Getting database names, not containing the symbols sequence 'de' in their names:
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``` sql
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SHOW DATABASES NOT LIKE '%de%'
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```
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Result:
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``` text
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┌─name───────────────────────────┐
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│ _temporary_and_external_tables │
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│ system │
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│ test │
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│ tutorial │
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└────────────────────────────────┘
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```
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Getting the first two rows from database names:
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``` sql
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SHOW DATABASES LIMIT 2
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```
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Result:
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``` text
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┌─name───────────────────────────┐
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│ _temporary_and_external_tables │
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│ default │
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└────────────────────────────────┘
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```
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### See Also {#see-also}
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- [CREATE DATABASE](https://clickhouse.tech/docs/en/sql-reference/statements/create/database/#query-language-create-database)
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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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Outputs the content of the [system.processes](../../operations/system-tables/processes.md#system_tables-processes) table, that contains a list of queries that is being processed at the moment, excepting `SHOW PROCESSLIST` queries.
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The `SELECT * FROM system.processes` query returns data about all the current queries.
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Tip (execute in the console):
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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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Displays a list of tables.
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```sql
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SHOW [TEMPORARY] TABLES [{FROM | IN} <db>] [LIKE | ILIKE | NOT LIKE '<pattern>'] [LIMIT <N>] [INTO OUTFILE <filename>] [FORMAT <format>]
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```
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If the `FROM` clause is not specified, the query returns the list of tables from the current database.
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This statement is identical to the query:
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```sql
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SELECT name FROM system.tables [WHERE name LIKE | ILIKE | NOT LIKE '<pattern>'] [LIMIT <N>] [INTO OUTFILE <filename>] [FORMAT <format>]
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```
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### Examples {#examples}
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Getting table names, containing the symbols sequence 'user' in their names:
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``` sql
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SHOW TABLES FROM system LIKE '%user%'
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```
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Result:
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``` text
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┌─name─────────────┐
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│ user_directories │
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│ users │
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└──────────────────┘
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```
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Getting table names, containing sequence 'user' in their names, in the case insensitive manner:
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``` sql
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SHOW TABLES FROM system ILIKE '%USER%'
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```
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Result:
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``` text
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┌─name─────────────┐
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│ user_directories │
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│ users │
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└──────────────────┘
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```
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Getting table names, not containing the symbol sequence 's' in their names:
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``` sql
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SHOW TABLES FROM system NOT LIKE '%s%'
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```
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Result:
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``` text
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┌─name─────────┐
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│ metric_log │
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│ metric_log_0 │
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│ metric_log_1 │
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└──────────────┘
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```
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Getting the first two rows from table names:
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``` sql
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SHOW TABLES FROM system LIMIT 2
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```
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Result:
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``` text
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┌─name───────────────────────────┐
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│ aggregate_function_combinators │
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│ asynchronous_metric_log │
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└────────────────────────────────┘
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```
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### See Also {#see-also}
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- [Create Tables](https://clickhouse.tech/docs/en/getting-started/tutorial/#create-tables)
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- [SHOW CREATE TABLE](https://clickhouse.tech/docs/en/sql-reference/statements/show/#show-create-table)
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## SHOW DICTIONARIES {#show-dictionaries}
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Displays a list of [external dictionaries](../../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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If the `FROM` clause is not specified, the query returns the list of dictionaries from the current database.
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You can get the same results as the `SHOW DICTIONARIES` query in the following way:
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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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**Example**
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The following query selects the first two rows from the list of tables in the `system` database, whose names contain `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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Shows privileges for a user.
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### Syntax {#show-grants-syntax}
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``` sql
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SHOW GRANTS [FOR user]
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```
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If user is not specified, the query returns privileges for the current user.
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## SHOW CREATE USER {#show-create-user-statement}
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Shows parameters that were used at a [user creation](../../sql-reference/statements/create/user.md).
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`SHOW CREATE USER` doesn’t output user passwords.
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### Syntax {#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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Shows parameters that were used at a [role creation](../../sql-reference/statements/create/role.md).
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### Syntax {#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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Shows parameters that were used at a [row policy creation](../../sql-reference/statements/create/row-policy.md).
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### Syntax {#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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Shows parameters that were used at a [quota creation](../../sql-reference/statements/create/quota.md).
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### Syntax {#show-create-quota-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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Shows parameters that were used at a [settings profile creation](../../sql-reference/statements/create/settings-profile.md).
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### Syntax {#show-create-settings-profile-syntax}
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``` sql
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SHOW CREATE [SETTINGS] PROFILE name
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```
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## SHOW USERS {#show-users-statement}
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Returns a list of [user account](../../operations/access-rights.md#user-account-management) names. To view user accounts parameters, see the system table [system.users](../../operations/system-tables/users.md#system_tables-users).
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### Syntax {#show-users-syntax}
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``` sql
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SHOW USERS
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```
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## SHOW ROLES {#show-roles-statement}
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Returns a list of [roles](../../operations/access-rights.md#role-management). To view another parameters, see system tables [system.roles](../../operations/system-tables/roles.md#system_tables-roles) and [system.role-grants](../../operations/system-tables/role-grants.md#system_tables-role_grants).
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### Syntax {#show-roles-syntax}
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``` sql
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SHOW [CURRENT|ENABLED] ROLES
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```
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## SHOW PROFILES {#show-profiles-statement}
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Returns a list of [setting profiles](../../operations/access-rights.md#settings-profiles-management). To view user accounts parameters, see the system table [settings_profiles](../../operations/system-tables/settings_profiles.md#system_tables-settings_profiles).
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### Syntax {#show-profiles-syntax}
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``` sql
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SHOW [SETTINGS] PROFILES
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```
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## SHOW POLICIES {#show-policies-statement}
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Returns a list of [row policies](../../operations/access-rights.md#row-policy-management) for the specified table. To view user accounts parameters, see the system table [system.row_policies](../../operations/system-tables/row_policies.md#system_tables-row_policies).
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### Syntax {#show-policies-syntax}
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``` sql
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SHOW [ROW] POLICIES [ON [db.]table]
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```
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## SHOW QUOTAS {#show-quotas-statement}
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Returns a list of [quotas](../../operations/access-rights.md#quotas-management). To view quotas parameters, see the system table [system.quotas](../../operations/system-tables/quotas.md#system_tables-quotas).
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### Syntax {#show-quotas-syntax}
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``` sql
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SHOW QUOTAS
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```
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## SHOW QUOTA {#show-quota-statement}
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Returns a [quota](../../operations/quotas.md) consumption for all users or for current user. To view another parameters, see system tables [system.quotas_usage](../../operations/system-tables/quotas_usage.md#system_tables-quotas_usage) and [system.quota_usage](../../operations/system-tables/quota_usage.md#system_tables-quota_usage).
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### Syntax {#show-quota-syntax}
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``` sql
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SHOW [CURRENT] QUOTA
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```
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[Original article](https://clickhouse.tech/docs/en/query_language/show/) <!--hide-->
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