CTE in SQL Server - Examples & AI Generator

Working with Common Table Expressions (CTEs) in SQL Server helps to write modular, readable queries—but remembering exact syntax and managing complex logic can slow teams down. Whether you’re a SQL developer transitioning between databases, a data analyst, or a database engineer, mastering CTEs is essential for advanced analytics. AI2sql lets you generate production-ready CTE queries in SQL Server from natural language, with no coding or syntax memorization required—so you can move from question to answer in seconds.

CTE Syntax in SQL Server

Standard SQL Server CTE Syntax

WITH cte_name AS (
    SELECT ... 
    FROM ... 
    WHERE ...
)
SELECT * FROM cte_name;

• WITH clause starts the CTE definition.

• CTEs can be chained or recursive for advanced scenarios.

• SQL Server requires the CTE to be immediately followed by a SELECT, INSERT, UPDATE, or DELETE.

CTE Examples You Can Generate Instantly

1. Find Customers with Large Orders

WITH BigOrders AS (
    SELECT CustomerID, SUM(OrderTotal) AS TotalSpent
    FROM Orders
    GROUP BY CustomerID
    HAVING SUM(OrderTotal) > 10000
)
SELECT c.CustomerName, b.TotalSpent
FROM Customers c
JOIN BigOrders b ON c.CustomerID = b.CustomerID;

2. List Products with Inventory Below Threshold

WITH LowStock AS (
    SELECT ProductID, ProductName, QuantityInStock
    FROM Products
    WHERE QuantityInStock < 20
)
SELECT * FROM LowStock;

3. Recursive CTE for Category Hierarchy

WITH CategoryHierarchy AS (
    SELECT CategoryID, CategoryName, ParentCategoryID, 0 AS Level
    FROM Categories
    WHERE ParentCategoryID IS NULL
    UNION ALL
    SELECT c.CategoryID, c.CategoryName, c.ParentCategoryID, ch.Level + 1
    FROM Categories c
    INNER JOIN CategoryHierarchy ch ON c.ParentCategoryID = ch.CategoryID
)
SELECT * FROM CategoryHierarchy;

Generate CTE queries in 10 seconds with AI2sql

Why Use AI2sql Instead of Manual CTE Coding

• Instant, error-free SQL: No need to remember SQL Server CTE syntax.

• Copy-paste ready: Skip repetition—generate complex queries tailored to your data model and use case.

• Time savings: 50,000+ users in 80+ countries depend on AI2sql Generator for rapid CTE query creation.

• Zero coding required: Describe your logic in plain language and get a ready-to-run query—no syntax troubleshooting.

Want in-depth learning? Learn CTE for SQL Server.

FAQ: CTE in SQL Server

• Q: Can I use multiple CTEs in a query?
  A: Yes. In SQL Server, you can chain multiple CTEs by separating them with commas after a single WITH keyword.

• Q: Are CTEs better than subqueries?
  A: CTEs improve readability and maintainability but aren’t always better in terms of performance. Use them for clarity, especially in recursive or multi-step logic.

• Q: What’s unique about SQL Server CTE syntax?
  A: SQL Server enforces placing the CTE directly before the SQL statement (like SELECT). It also supports recursive CTEs natively.

Ready to Skip Manual SQL Coding?

Don’t waste hours debugging CTE syntax. Generate your first SQL Server CTE query instantly with AI2sql—just describe what you need and get the optimal code, ready for production. Transform how you build complex SQL with no code, 10-second speed, and real business results.