75 lines
2.0 KiB
Markdown
75 lines
2.0 KiB
Markdown
---
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layout: default
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title: SQL
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nav_order: 38
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has_children: true
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has_toc: false
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---
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# SQL
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OpenSearch SQL lets you write queries in SQL rather than the [OpenSearch query domain-specific language (DSL)](../opensearch/full-text). If you're already familiar with SQL and don't want to learn the query DSL, this feature is a great option.
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## Workbench
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The easiest way to get familiar with the SQL plugin is to use **SQL Workbench** in OpenSearch Dashboards to test various queries. To learn more, see [Workbench](workbench/).
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## REST API
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To use the SQL plugin with your own applications, send requests to `_opensearch/_sql`:
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```json
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POST _opensearch/_sql
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{
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"query": "SELECT * FROM my-index LIMIT 50"
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}
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```
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Here’s how core SQL concepts map to OpenSearch:
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SQL | OpenSearch
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:--- | :---
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Table | Index
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Row | Document
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Column | Field
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You can query multiple indices by listing them or using wildcards:
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```json
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POST _opensearch/_sql
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{
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"query": "SELECT * FROM my-index1,myindex2,myindex3 LIMIT 50"
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}
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POST _opensearch/_sql
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{
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"query": "SELECT * FROM my-index* LIMIT 50"
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}
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```
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For a sample [curl](https://curl.haxx.se/) command, try:
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```bash
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curl -XPOST https://localhost:9200/_opensearch/_sql -u 'admin:admin' -k -H 'Content-Type: application/json' -d '{"query": "SELECT * FROM opensearch_dashboards_sample_data_flights LIMIT 10"}'
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```
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By default, queries return data in JDBC format, but you can also return data in standard OpenSearch JSON, CSV, or raw formats:
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```json
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POST _opensearch/_sql?format=json|csv|raw
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{
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"query": "SELECT * FROM my-index LIMIT 50"
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}
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```
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See the rest of this guide for detailed information on request parameters, settings, supported operations, tools, and more.
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## Contributing
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To get involved and help us improve the SQL plugin, see the [development guide](https://github.com/opensearch-project/sql/blob/master/docs/developing.rst) for instructions on setting up your development environment and building the project.
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