A working knowledge base of SQL Server data-fix scripts, integration and operations patterns, browser tools, and hands-on AI guides, shaped by real constraints: messy data, limited schema control, and the need to be reliable.https://webdevrock.uk/en-gbhttps://webdevrock.uk/tools/foreign-key-diagram/https://webdevrock.uk/tools/foreign-key-diagram/Paste the results of a query against sys.foreign_keys and get a diagram of your tables and how they relate, with every column if you want them. Export as SVG, PNG or Mermaid.Thu, 05 Nov 2026 00:00:00 GMTToolsql-serverschematoolhttps://webdevrock.uk/experiments/terrain-shader/https://webdevrock.uk/experiments/terrain-shader/Build a 3D landscape in seven steps with your own GLSL shaders: a grid of vertices, noise, fractal hills, colour by height, lighting, water and fog.Sun, 01 Nov 2026 00:00:00 GMTExperimentthreejsvisualizationshadersglslhttps://webdevrock.uk/experiments/embedding-space-explorer/https://webdevrock.uk/experiments/embedding-space-explorer/An interactive 3D map of about 200 phrases embedded with a real model. See why similar meanings sit together, how semantic search finds answers without shared words, and where it goes wrong.Sun, 01 Nov 2026 00:00:00 GMTExperimentthreejsvisualizationaiembeddingshttps://webdevrock.uk/experiments/database-index-btree/https://webdevrock.uk/experiments/database-index-btree/Watch SQL Server find customers by ID and by surname, page by page. An interactive Three.js model of a table, an index, key lookups and page splits.Sun, 01 Nov 2026 00:00:00 GMTExperimentthreejsvisualizationsql-serverperformancehttps://webdevrock.uk/experiments/sql-server-join-algorithms/https://webdevrock.uk/experiments/sql-server-join-algorithms/Watch SQL Server's three join algorithms join the same rows at the same time, then see which one does the least work at real table sizes, and why.Sun, 01 Nov 2026 00:00:00 GMTExperimentthreejsvisualizationsql-serverperformancehttps://webdevrock.uk/experiments/sql-execution-plan-3d/https://webdevrock.uk/experiments/sql-execution-plan-3d/An interactive 3D execution plan viewer. See where a query's cost goes, why a scan, a key lookup or a bad estimate slows it down, or paste your own plan.Sun, 01 Nov 2026 00:00:00 GMTExperimentthreejsvisualizationsql-serverperformancehttps://webdevrock.uk/ai/llm-sql-production-safely/https://webdevrock.uk/ai/llm-sql-production-safely/How to let an AI assistant or agent query a live SQL Server database without risking the data: a read-only login it can't escape, limits on what reads cost, and a reviewed, reversible path for changes.Sun, 01 Nov 2026 00:00:00 GMTAI guideaillmagentssql-serversecurityadvancedhttps://webdevrock.uk/experiments/rate-limiting-algorithms/https://webdevrock.uk/experiments/rate-limiting-algorithms/Four rate limiters enforce the same limit on the same traffic, side by side in 3D. See why fixed windows let bursts through, how the two buckets differ, and how retries make it worse.Sun, 01 Nov 2026 00:00:00 GMTExperimentthreejsvisualizationintegrationsresiliencehttps://webdevrock.uk/experiments/integration-pipeline-particle-flow/https://webdevrock.uk/experiments/integration-pipeline-particle-flow/An interactive Three.js simulation of an integration pipeline. Watch messages retry, back off, trip a circuit breaker and land in a needs-attention queue during an API outage.Sun, 01 Nov 2026 00:00:00 GMTExperimentthreejsvisualizationsimulationintegrationsresiliencehttps://webdevrock.uk/experiments/threejs-node-graph/https://webdevrock.uk/experiments/threejs-node-graph/A 3D force-directed graph in Three.js. Nodes repel, connections act as springs, and the layout cools until it settles.Sun, 01 Nov 2026 00:00:00 GMTExperimentthreejsvisualizationsimulationhttps://webdevrock.uk/snippets/sql-xml-json-convert/https://webdevrock.uk/snippets/sql-xml-json-convert/Turn XML into JSON with nodes() and FOR JSON, and JSON into XML with OPENJSON and FOR XML PATH, keeping nested rows nested.Sun, 25 Oct 2026 00:00:00 GMTSnippetsqlsql-serverxmljsonintegrationshttps://webdevrock.uk/snippets/sql-query-large-xml/https://webdevrock.uk/snippets/sql-query-large-xml/Why shredding a big XML file with nodes() can take minutes, and the fixes that bring it back to seconds: no parent axis, full paths, text(), shredding once.Sun, 25 Oct 2026 00:00:00 GMTSnippetsqlsql-serverxmlperformanceintegrationshttps://webdevrock.uk/snippets/sql-xml-to-rows/https://webdevrock.uk/snippets/sql-xml-to-rows/Shred an XML document into rows and typed columns with nodes() and value(), including child rows, attributes and namespaces.Sun, 25 Oct 2026 00:00:00 GMTSnippetsqlsql-serverxmlintegrationshttps://webdevrock.uk/tools/xml-json-converter/https://webdevrock.uk/tools/xml-json-converter/Convert XML to JSON and JSON back to XML, with attributes, repeated elements and namespaces handled the same way in both directions.Sun, 25 Oct 2026 00:00:00 GMTToolsql-serverxmljsonintegrationstoolhttps://webdevrock.uk/tools/xml-to-nodes/https://webdevrock.uk/tools/xml-to-nodes/Paste a sample XML document and get a SQL Server nodes()/value() query, with column types inferred from the data and child rows shredded with CROSS APPLY.Sun, 25 Oct 2026 00:00:00 GMTToolsql-serverxmlintegrationstoolhttps://webdevrock.uk/patterns/large-data-changes-without-outage/https://webdevrock.uk/patterns/large-data-changes-without-outage/Planning backfills and clean-ups that touch millions of rows while the system stays live.Sat, 24 Oct 2026 00:00:00 GMTPatternsql-serverdata-fixoperationsperformancehttps://webdevrock.uk/patterns/audit-trails-for-investigation/https://webdevrock.uk/patterns/audit-trails-for-investigation/What to record about data changes, and how to store it so you can answer what happened when something goes wrong.Sat, 24 Oct 2026 00:00:00 GMTPatternauditoperationssql-serverobservabilityhttps://webdevrock.uk/patterns/integration-jobs-safe-to-rerun/https://webdevrock.uk/patterns/integration-jobs-safe-to-rerun/How to make jobs produce the same result whether they run once, twice, or restart halfway through.Sat, 24 Oct 2026 00:00:00 GMTPatternintegrationspipelinesidempotencyoperationshttps://webdevrock.uk/tools/json-to-openjson/https://webdevrock.uk/tools/json-to-openjson/Paste a sample JSON payload and get a SQL Server OPENJSON query with column types inferred from the data.Sat, 24 Oct 2026 00:00:00 GMTToolsql-serverjsonintegrationstoolhttps://webdevrock.uk/tools/list-to-sql/https://webdevrock.uk/tools/list-to-sql/Turn a pasted list of ids, or ids and new values, into a #temp table, an IN list, or JSON for OPENJSON.Sat, 24 Oct 2026 00:00:00 GMTToolsql-serverdata-fixtoolhttps://webdevrock.uk/tools/retry-schedule/https://webdevrock.uk/tools/retry-schedule/See when each retry happens for an exponential backoff policy, and how long a call can take before it gives up.Sat, 24 Oct 2026 00:00:00 GMTToolintegrationshttpresiliencetoolhttps://webdevrock.uk/patterns/handling-unreliable-external-apis/https://webdevrock.uk/patterns/handling-unreliable-external-apis/A system-level policy for which failures to retry, how long to keep trying, and what happens when retries run out.Sat, 24 Oct 2026 00:00:00 GMTPatternintegrationspipelinesresilienceoperationshttps://webdevrock.uk/tools/data-fix-script/https://webdevrock.uk/tools/data-fix-script/Generate a SQL Server data fix script for an update or a delete, with a preview, backup table, verification, and a ready-made rollback or restore.Sat, 24 Oct 2026 00:00:00 GMTToolsql-serverdata-fixoperationstoolhttps://webdevrock.uk/snippets/sql-remove-duplicates-row-number/https://webdevrock.uk/snippets/sql-remove-duplicates-row-number/Preview duplicate rows, keep one per group, and delete the rest safely.Sat, 24 Oct 2026 00:00:00 GMTSnippetsqlsql-serverdata-fixduplicateshttps://webdevrock.uk/snippets/sql-pass-id-list/https://webdevrock.uk/snippets/sql-pass-id-list/Turn a comma-separated or JSON list into rows you can JOIN to, with no string concatenation or SQL injection risk.Sat, 24 Oct 2026 00:00:00 GMTSnippetsqlsql-serversecurityjsonhttps://webdevrock.uk/snippets/sql-output-into-audit/https://webdevrock.uk/snippets/sql-output-into-audit/Capture before and after values of an UPDATE or DELETE in the same statement, so any data fix can be undone.Sat, 24 Oct 2026 00:00:00 GMTSnippetsqlsql-serverdata-fixaudithttps://webdevrock.uk/snippets/sql-batch-update-delete/https://webdevrock.uk/snippets/sql-batch-update-delete/Change large volumes of data in small batches to avoid table locks, log growth and blocking.Sat, 24 Oct 2026 00:00:00 GMTSnippetsqlsql-serverdata-fixperformancehttps://webdevrock.uk/patterns/stop-duplicates-at-source/https://webdevrock.uk/patterns/stop-duplicates-at-source/Where duplicate records come from, and how to design imports, constraints, and matching so they cannot be created.Sat, 24 Oct 2026 00:00:00 GMTPatterndata-qualityintegrationssql-serveroperationshttps://webdevrock.uk/tools/timestamp-converter/https://webdevrock.uk/tools/timestamp-converter/Convert between Unix timestamps, ISO 8601, .NET ticks, Microsoft JSON dates, HTTP dates, and SQL Server literals.Sat, 24 Oct 2026 00:00:00 GMTToolintegrationssql-serverdatestoolhttps://webdevrock.uk/snippets/ts-fetch-retry-backoff/https://webdevrock.uk/snippets/ts-fetch-retry-backoff/A small typed fetch wrapper that retries timeouts, rate limits and server errors without hammering the API.Sat, 24 Oct 2026 00:00:00 GMTSnippettypescriptjavascripthttpintegrationshttps://webdevrock.uk/ai/what-are-ai-agents/https://webdevrock.uk/ai/what-are-ai-agents/Stop treating AI as a chatbot and start treating it as a system: what AI agents are, how they differ from LLMs, and workflows you can set up today.Sun, 21 Jun 2026 00:00:00 GMTAI guideaiagentsllmautomationbeginnerhttps://webdevrock.uk/ai/multi-agent-architecture/https://webdevrock.uk/ai/multi-agent-architecture/When one agent isn't enough. Routing, specialisation, coordination, and the patterns I've used to build systems like Hermes.Sun, 21 Jun 2026 00:00:00 GMTAI guideaiagentsarchitecturemulti-agentadvancedhttps://webdevrock.uk/ai/building-agent-system/https://webdevrock.uk/ai/building-agent-system/A practical walkthrough of setting up local LLMs, connecting tools, and running agents on a schedule, based on what I actually use rather than theory.Sun, 21 Jun 2026 00:00:00 GMTAI guideaiagentsollamalocal-llmautomationintermediatehttps://webdevrock.uk/ai/llm-productivity-workflows/https://webdevrock.uk/ai/llm-productivity-workflows/How I actually use LLMs day to day: email triage, content drafting, research synthesis, and decision support. Real patterns, not theoretical possibilities.Sun, 21 Jun 2026 00:00:00 GMTAI guidellmproductivityworkflowautomationintermediatehttps://webdevrock.uk/experiments/outsystems-rest-api/https://webdevrock.uk/experiments/outsystems-rest-api/Implementation guide for REST API endpoints in OutSystems to track publish activity and application metrics.Fri, 27 Feb 2026 00:00:00 GMTExperimentoutsystemsrest-apibackendhttps://webdevrock.uk/snippets/sql-safe-bulk-delete-join/https://webdevrock.uk/snippets/sql-safe-bulk-delete-join/Delete rows using a JOIN with a preview step to avoid accidental data loss.Mon, 16 Feb 2026 00:00:00 GMTSnippetsqlsql-serverdata-fixdeletehttps://webdevrock.uk/snippets/sql-update-only-when-changed/https://webdevrock.uk/snippets/sql-update-only-when-changed/Avoid unnecessary writes and locking by updating rows only when values differ.Mon, 16 Feb 2026 00:00:00 GMTSnippetsqlsql-serverperformancedata-fixhttps://webdevrock.uk/snippets/sql-upsert-without-merge/https://webdevrock.uk/snippets/sql-upsert-without-merge/Insert new rows and update existing rows safely without using MERGE.Mon, 16 Feb 2026 00:00:00 GMTSnippetsqlsql-serverupsertdata-fixhttps://webdevrock.uk/snippets/sql-bulk-update-join/https://webdevrock.uk/snippets/sql-bulk-update-join/Update many rows from a supplied list of IDs + values using a temp table and JOIN. Ideal for data fixes.Sat, 14 Feb 2026 00:00:00 GMTSnippetsqlsql-serverdata-fixbulk-updatehttps://webdevrock.uk/patterns/sql-reversible-data-fix/https://webdevrock.uk/patterns/sql-reversible-data-fix/A repeatable approach for production-safe updates with verification and rollback.Thu, 12 Feb 2026 00:00:00 GMTPatternsql-serverdata-fixoperationshttps://webdevrock.uk/patterns/integration-pipelines-fail-safely/https://webdevrock.uk/patterns/integration-pipelines-fail-safely/A practical approach to building integration pipelines that prevent bad data from reaching downstream systems.Thu, 12 Feb 2026 00:00:00 GMTPatternintegrationspipelinesvalidationoperationshttps://webdevrock.uk/patterns/status-tables-fail-operations/https://webdevrock.uk/patterns/status-tables-fail-operations/Why simple status fields rarely communicate system state clearly, and how staged models improve operational clarity.Thu, 12 Feb 2026 00:00:00 GMTPatternoperationsuxpipelinesobservabilityhttps://webdevrock.uk/experiments/flocking-algorithm/https://webdevrock.uk/experiments/flocking-algorithm/Implementation of Craig Reynolds' Boids flocking simulation in Three.js.Sun, 08 Feb 2026 00:00:00 GMTExperimentthreejsalgorithmsimulation