a75dc80a76
### What changes were proposed in this pull request? Remove the unneeded embedded inline HTML markup by using the basic markdown syntax. Please see #28414 ### Why are the changes needed? Make the doc cleaner and easily editable by MD editors. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Manually build and check Closes #28451 from huaxingao/html_cleanup. Authored-by: Huaxin Gao <huaxing@us.ibm.com> Signed-off-by: Sean Owen <srowen@gmail.com>
107 lines
3.4 KiB
Markdown
107 lines
3.4 KiB
Markdown
---
|
|
layout: global
|
|
title: SHOW TABLES
|
|
displayTitle: SHOW TABLES
|
|
license: |
|
|
Licensed to the Apache Software Foundation (ASF) under one or more
|
|
contributor license agreements. See the NOTICE file distributed with
|
|
this work for additional information regarding copyright ownership.
|
|
The ASF licenses this file to You under the Apache License, Version 2.0
|
|
(the "License"); you may not use this file except in compliance with
|
|
the License. You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
---
|
|
|
|
### Description
|
|
|
|
The `SHOW TABLES` statement returns all the tables for an optionally specified database.
|
|
Additionally, the output of this statement may be filtered by an optional matching
|
|
pattern. If no database is specified then the tables are returned from the
|
|
current database.
|
|
|
|
### Syntax
|
|
|
|
```sql
|
|
SHOW TABLES [ { FROM | IN } database_name ] [ LIKE regex_pattern ]
|
|
```
|
|
|
|
### Parameters
|
|
|
|
* **{ FROM `|` IN } database_name**
|
|
|
|
Specifies the database name from which tables are listed.
|
|
|
|
* **regex_pattern**
|
|
|
|
Specifies the regular expression pattern that is used to filter out unwanted tables.
|
|
|
|
* Except for `*` and `|` character, the pattern works like a regular expression.
|
|
* `*` alone matches 0 or more characters and `|` is used to separate multiple different regular expressions,
|
|
any of which can match.
|
|
* The leading and trailing blanks are trimmed in the input pattern before processing. The pattern match is case-insensitive.
|
|
|
|
### Examples
|
|
|
|
```sql
|
|
-- List all tables in default database
|
|
SHOW TABLES;
|
|
+--------+---------+-----------+
|
|
|database|tableName|isTemporary|
|
|
+--------+---------+-----------+
|
|
| default| sam| false|
|
|
| default| sam1| false|
|
|
| default| suj| false|
|
|
+--------+---------+-----------+
|
|
|
|
-- List all tables from userdb database
|
|
SHOW TABLES FROM userdb;
|
|
+--------+---------+-----------+
|
|
|database|tableName|isTemporary|
|
|
+--------+---------+-----------+
|
|
| userdb| user1| false|
|
|
| userdb| user2| false|
|
|
+--------+---------+-----------+
|
|
|
|
-- List all tables in userdb database
|
|
SHOW TABLES IN userdb;
|
|
+--------+---------+-----------+
|
|
|database|tableName|isTemporary|
|
|
+--------+---------+-----------+
|
|
| userdb| user1| false|
|
|
| userdb| user2| false|
|
|
+--------+---------+-----------+
|
|
|
|
-- List all tables from default database matching the pattern `sam*`
|
|
SHOW TABLES FROM default LIKE 'sam*';
|
|
+--------+---------+-----------+
|
|
|database|tableName|isTemporary|
|
|
+--------+---------+-----------+
|
|
| default| sam| false|
|
|
| default| sam1| false|
|
|
+--------+---------+-----------+
|
|
|
|
-- List all tables matching the pattern `sam*|suj`
|
|
SHOW TABLES LIKE 'sam*|suj';
|
|
+--------+---------+-----------+
|
|
|database|tableName|isTemporary|
|
|
+--------+---------+-----------+
|
|
| default| sam| false|
|
|
| default| sam1| false|
|
|
| default| suj| false|
|
|
+--------+---------+-----------+
|
|
```
|
|
|
|
### Related Statements
|
|
|
|
* [CREATE TABLE](sql-ref-syntax-ddl-create-table.html)
|
|
* [DROP TABLE](sql-ref-syntax-ddl-drop-table.html)
|
|
* [CREATE DATABASE](sql-ref-syntax-ddl-create-database.html)
|
|
* [DROP DATABASE](sql-ref-syntax-ddl-drop-database.html)
|