Tutorials ADO.NET Core Tutorial
CQRS with ADO.NET — Complete Guide
CQRS with ADO.NET — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of ADO.NET Core Tutorial on Toolliyo Academy.
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ADO.NET Core Tutorial · Lesson 61 of 100
CQRS with ADO.NET
Foundations ✓ → SQL & safety ✓ → Production → Projects
Production · 3 — ASP.NET & enterprise · ~10 min · Module 7: Advanced Enterprise Topics
What is this?
CQRS with ADO.NET uses separate write SQL/procs and denormalized read queries/connections.
Why should you care?
ShopNest checkout writes OLTP; history reads a projection or replica.
See it live — copy this example
Use a .NET console or API project with SQL Server LocalDB. Run dotnet run after pasting.
// write
await exec.ProcAsync("usp_Orders_Place", ...);
// read model
cmd.CommandText = "SELECT ... FROM OrdersByUser WHERE UserId=@u"; // projection tableWhat happened?
- Writes and reads can use different connection strings.
- Projectors update read tables from events/outbox.
Practice next
- Split write/read methods.
- Read on replica CS.
- Document lag.
- Add OrdersByUser table.
- Projector sketch.
Remember
Separate write/read SQL. Replica for reads. Expect lag.
ShopNest history read model
Reads hit OrdersByUser via ADO.NET.
Outcome: Checkout writes stay simple.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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