SQL analyzer
Paste a SQL query to find risky patterns before you run it. The analyzer is deterministic, browser-only, and never connects to your database.
Analyze a query to see warnings, referenced tables, and referenced columns.
What is static SQL analysis?
Static SQL analysis checks the text and structure of a query without executing it. That makes it useful for code review, generated SQL review, migration audits, and quick sanity checks before a query hits production data.
Because this tool does not connect to a database, it cannot estimate runtime cost or inspect indexes. Instead, it flags deterministic patterns that often deserve a second look: broad scans, unsafe writes, implicit joins, and unusually complex query shapes.
When to use a SQL analyzer
- Reviewing a query before running it in production
- Checking AI-generated SQL for broad or unsafe patterns
- Finding referenced tables and columns in unfamiliar SQL
- Spotting missing filters, missing limits, and complex joins
FAQ
Does the SQL analyzer optimize my query? +
No. This is a static analyzer, not a cost-based database optimizer. It parses SQL text and flags deterministic patterns that are often risky, expensive, or hard to review.
Is my SQL sent to a server? +
No. Parsing and analysis run entirely in your browser. Your SQL is never uploaded, stored, or logged by Basedash.
Which checks does it run? +
It checks for SELECT *, broad SELECT statements without WHERE or LIMIT, unsafe UPDATE or DELETE statements without WHERE, implicit comma joins, high join counts, nested subqueries, and ORDER BY without LIMIT.
Can it recommend indexes? +
Not reliably. True index recommendations require table statistics and query plans from a live database. This browser tool can only report referenced tables, columns, and static query patterns.
Why would valid SQL fail to parse? +
The parser supports many common dialects, but every database has edge-case syntax. If a query fails, try the closest dialect or simplify vendor-specific clauses before analyzing it.
Turn checked SQL into live dashboards
Connect your data and build charts, dashboards, and reports with Basedash.