MySQL Syntax Checker
Check the syntax of MySQL queries
Features
Instantly detect syntax mistakes
Instantly parse the grammar of the entered MySQL query and point out errors
Pinpoint the error location by line
Indicate where a syntax error occurs with a line number to aid fixing
Validate syntax without a DB connection
Safely check only the query grammar without connecting to a real database
Check behavior with samples
Load valid and error example queries with one click to grasp the behavior
How to Use
Enter the SQL query
Write the MySQL query you want to syntax-check in the input field; sample loading is also available
Run with one click
Press the check button or use Ctrl/Cmd+Enter to run the syntax analysis
Check the result and errors
See either the no-error display or, when there is an error, the relevant line and details in a list
Use Cases
Prevent mistakes before running
Find query grammar mistakes before running on the production DB to avoid risk
Check while learning SQL
Verify on the spot whether a query you wrote while learning is grammatically correct
Inspect long queries
Find omissions and syntax breaks in complex, long queries line by line
Self-check before review
Check in advance for syntax errors before submission or requesting a review
Basic Knowledge
What Syntax Check Can and Cannot Detect
Syntax check is an inspection that finds grammatical errors in SQL (such as misspellings, missing commas, or missing parentheses) without executing the query. It cannot determine whether tables or columns actually exist or whether results match your intent, so it is used as a preliminary check before execution.
What Are MySQL Dialects
Although SQL has a standard specification, the syntax that can be written varies slightly depending on the database product. MySQL has dialects such as the ability to enclose identifiers in backticks (`), the availability of the LIMIT clause, and SQL from other products may not run as-is.
Safety and Privacy
Server-side processing
Input is processed on the server; only information necessary for the inquiry is sent.
Temporary processing only
For syntax checking, temporary processing occurs on the server, then data is discarded after results are returned.
Communications encrypted with HTTPS
All sent and received data is encrypted by TLS and cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No connection to a real database
The query is used only for grammar analysis, with no connection to or execution on a real DB
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Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.