--- title: "What Is Dynamic SQL? Definition & Examples | OWOX" canonical: "https://www.owox.com/glossary/dynamic-sql" updated: "2025-06-27" --- # What Is Dynamic SQL? Dynamic SQL is a technique where SQL queries are created and executed at runtime as text strings. **3 min** read · Updated June 27, 2025 · [Data Modeling](/blog/topics/data-modeling) Dynamic SQL enables applications to generate SQL code dynamically based on user inputs or real-time conditions. Unlike static SQL, which is fixed at compile-time, dynamic SQL constructs the query only when it needs to run. This enables more flexible and customizable query behavior across various scenarios. ## **Examples of Dynamic SQL** A typical example of dynamic SQL involves constructing a query string and running it using sp\_executesql. Let’s say we want to view all data from a specific table chosen by the user: > DECLARE @tableName NVARCHAR(MAX), @sql NVARCHAR(MAX); > SET @tableName = ‘Customers’; > SET @sql = ’SELECT \* FROM ’ + @tableName; > EXEC sp\_executesql @sql; **What this shows**: After running the query, the SQL engine executes: **SELECT \* FROM Customers**, dynamically pulling data from the specified table.  ## **Static SQL vs. Dynamic SQL: Key Differences** Both static and dynamic SQL serve different purposes depending on how flexible or performant the application needs to be. * **Definition**: Static SQL is pre-written and compiled before execution. Dynamic SQL is generated on the fly at runtime. * **Flexibility**: Dynamic SQL offers adaptability for changing inputs or structures. Static SQL requires code changes for such modifications. * **Performance**: Static SQL often delivers better performance due to pre-compiled access paths. Dynamic SQL may need to be parsed and optimized at runtime. * **Execution Planning**: Static SQL can use fixed access paths or host variable optimization settings. Dynamic SQL relies on runtime optimization, with options like REOPT(AUTO), REOPT(ONCE), or REOPT(ALWAYS). * **Caching**: Static SQL benefits from consistent plans and reuse. Dynamic SQL may use the dynamic statement cache but can incur repeated planning costs. * **Use Case**: Choose dynamic SQL when queries need to change frequently, such as generating reports or handling multiple schemas. Use static SQL for well-known, high-performance queries. ## The Turning Point OWOX Data Marts See your first report built in real time. _15 minutes._ 1. Connect your data warehouse 2. Pick your metrics 3. Get a live Google Sheets report In the time it takes to write a ticket. Then imagine never writing that ticket again. [Book a Demo](https://www.owox.com/demo) We'll use your actual use case ## **Using Dynamic SQL: Step-by-Step Guide** To run dynamic SQL in SQL Server, follow these basic steps: **Step 1: Declare Variables**: Define a variable to hold your table name and a second one for the SQL query. > DECLARE @tableName NVARCHAR(MAX), @sql NVARCHAR(MAX); **Step 2: Assign Table Name**: Set the value of the table name dynamically. > SET @tableName _\= N’TargetTable’_; **Step 3: Construct the SQL Query**: Concatenate the SELECT statement with the table name. > SET @sql _\= N’SELECT \* FROM ’ + @tableName_; **Step 4: Execute the SQL**: Use sp\_executesql to run the dynamic SQL. > EXEC sp\_executesql @sql; This approach allows dynamic data access based on changing inputs or logic, which is useful in flexible or user-driven applications. ## **Top Use Cases for Dynamic SQL** Dynamic SQL proves especially useful in situations where query logic must adjust on the fly: * **Interactive reporting**: Generate queries with filters, columns, or tables selected by users. * **Multi-client systems**: Swap table names or schemas depending on the tenant. * **Dynamic dashboards**: Build flexible backends for sorting, searching, or filtering. * **Data orchestration tools**: Script conditional operations like MERGE, UPDATE, or DELETE. * **Reusable procedures**: Design general-purpose logic adaptable to many input structures. It’s best suited for cases where fixed SQL simply can’t handle the variability or customization needed in real-time processing. Dynamic SQL helps solve problems where flexibility and customization are critical. By enabling dynamic logic in queries, it allows developers and analysts to meet a wide range of business needs without rewriting static code for each scenario. It’s particularly useful in reporting platforms, BI tools, and multi-user data environments. ## **From Data to Decisions: OWOX BI SQL Copilot for Optimized Queries** [OWOX BI SQL Copilot](https://www.owox.com/products/sql-copilot/) helps you write, validate, and optimize both static and dynamic SQL in BigQuery. With smart suggestions, structure-aware prompts, and context-driven templates, it simplifies query creation across complex logic paths. Whether you’re building flexible reports, automating transformations, or personalizing dashboards, SQL Copilot keeps your workflow fast, accurate, and efficient. ## Topics [Glossary](/glossary) [Data Modeling](/blog/topics/data-modeling) ## Related terms [What Is SQL? Definition & Key Concepts](/glossary/what-is-sql) [What Is a Query? SQL Definition & Examples](/glossary/what-is-query) [What Is a Primary Key? Definition & Examples](/glossary/primary-key) [BigQuery](/glossary/what-is-bigquery) [Abstraction in Data Modeling](/glossary/abstraction-in-data-modeling) [ACID Compliance](/glossary/acid-compliance) ## Related articles ## Learn more about analytics [bigquery · BigQuery Code Standards: Best Practices for Writing Clean and Efficient SQL · Apr 29, 2025](/blog/articles/bigquery-code-standards-best-practices) [sql · Understanding Key Constraints in SQL for Data Integrity · Apr 28, 2025](/blog/articles/key-constraints-sql) [bigquery · Google BigQuery Explained: Everything You Need to Know · Aug 26, 2024](/blog/articles/bigquery-everything-you-need-to-know) ## Customer stories ## Learn how teams ship analytics faster Organizations that scaled analytics without scaling headcount [All case studies →](/blog/success-stories) [Purblack · "For 10 years I was blind." 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And because of that, you need something which will create guardrails to ensure that there are no hallucinations, that you can trust your data.”_ C5 · re: opened eyes ![Nodari Rizun](https://cdn.owox.ai/www/webflow/6a7b298b2ca5055443187566_nodari-headshot.png/public) Nodari Rizun · Founder & CEO, Pürblack® > _“I was blind, now I can see. OWOX opened our eyes.”_ E9 · re: results and support PandaDoc · Analytics team > _“We are extremely satisfied with the results achieved through our partnership with OWOX. I'm also impressed by quick and effective support we get from OWOX”_ ## Your New Normal Turn your data into decisions. Governed data marts give you the clean foundation ML needs to actually work. * No AI hallucinations * Analyst-governed definitions * Every number traces to SQL [Get started free](https://www.owox.com/app-signup) ## References Pages this page links to, on this site and on docs.owox.com. Where the page has a Markdown twin, its address follows the link. - [Data Modeling](https://www.owox.com/blog/topics/data-modeling) — /blog/topics/data-modeling.md - [Book a Demo](https://www.owox.com/demo) — /demo.md - [OWOX BI SQL Copilot](https://www.owox.com/products/sql-copilot) - [Glossary](https://www.owox.com/glossary) — /glossary.md - [What Is SQL? Definition & Key Concepts](https://www.owox.com/glossary/what-is-sql) — /glossary/what-is-sql.md - [What Is a Query? SQL Definition & Examples](https://www.owox.com/glossary/what-is-query) — /glossary/what-is-query.md - [What Is a Primary Key? Definition & Examples](https://www.owox.com/glossary/primary-key) — /glossary/primary-key.md - [BigQuery](https://www.owox.com/glossary/what-is-bigquery) — /glossary/what-is-bigquery.md - [Abstraction in Data Modeling](https://www.owox.com/glossary/abstraction-in-data-modeling) — /glossary/abstraction-in-data-modeling.md - [ACID Compliance](https://www.owox.com/glossary/acid-compliance) — /glossary/acid-compliance.md - [bigquery · BigQuery Code Standards: Best Practices for Writing Clean and Efficient SQL · Apr 29,…](https://www.owox.com/blog/articles/bigquery-code-standards-best-practices) — /blog/articles/bigquery-code-standards-best-practices.md - [sql · Understanding Key Constraints in SQL for Data Integrity · Apr 28, 2025](https://www.owox.com/blog/articles/key-constraints-sql) — /blog/articles/key-constraints-sql.md - [bigquery · Google BigQuery Explained: Everything You Need to Know · Aug 26, 2024](https://www.owox.com/blog/articles/bigquery-everything-you-need-to-know) — /blog/articles/bigquery-everything-you-need-to-know.md - [All case studies →](https://www.owox.com/blog/success-stories) — /blog/success-stories.md - [Purblack · "For 10 years I was blind." The day Pürblack® founder stopped guessing · Seconds · to get…](https://www.owox.com/blog/success-stories/purblack) — /blog/success-stories/purblack.md - [Reformation · How OWOX Reports Helped Reformation Make Data-Backed Decisions · Minutes · from data…](https://www.owox.com/blog/success-stories/reformation) — /blog/success-stories/reformation.md - [WorkSimpli · How OWOX Reports Streamlined Operations for WorkSimpli, Saving Over 10 Hours Weekly ·…](https://www.owox.com/blog/success-stories/worksimpli) — /blog/success-stories/worksimpli.md - [Get started free](https://www.owox.com/app-signup)