粘贴 SQL 查询并运行快速语法检查 — 检查引号和括号是否匹配、是否有多余逗号以及语句结构是否合理。这是一个快速检查工具，不是完整的 MySQL 解析器或查询执行器。它不连接数据库，您的 SQL 不会离开浏览器。
此工具在浏览器中运行快速结构性语法检查：单引号、双引号和反引号是否匹配；括号是否匹配；FROM、) 或语句末尾前是否有多余逗号；查询是否以已知关键字开头；是否缺少末尾分号（显示为警告）。它不理解完整的 MySQL 语法，不验证表名或列名，也不执行任何操作。它不连接数据库，您的 SQL 将保留在此页面上。
Writing MySQL by hand is easy to get slightly wrong — a missing closing parenthesis, a trailing comma before FROM, an unclosed quote inside a string literal. These mistakes usually don't show up until you run the query against a real server, and by then you've lost the context of what you were editing. MySQL Syntax Check catches this class of error immediately, in your browser, by scanning the query text for structural problems before you ever open a database client.
The checker looks at the shape of the statement rather than trying to fully parse MySQL's grammar: it verifies that single quotes, double quotes, and parentheses are balanced and correctly nested, flags trailing commas left behind after reordering columns or conditions, and confirms the statement has a recognizable shape (SELECT, INSERT, UPDATE, DELETE, and similar). Because it's a syntax sanity check rather than a query executor, it never opens a connection to any database — there's nothing to configure, no credentials to enter, and no risk of accidentally running a query against production data.
This makes it a fast first pass before pasting a query into a migration script, a stored procedure, or a code review: run it on a rough draft to catch copy-paste mistakes — like a comma left after removing the last column in a SELECT list — before the query reaches an environment where a typo means a failed deploy or a confusing database error message.
Validate the structural syntax of a MySQL statement directly in your browser before running it against a database.
Paste or type the MySQL statement you want to check into the input box.
Trigger the syntax check so the tool scans the statement for balanced quotes, matched parentheses, and a valid overall statement shape.
Look at the results for any reported problems, such as an unclosed quote, a mismatched parenthesis, or a trailing comma.
Edit the statement directly in the input box to resolve each issue the checker points out.
Run the check again after edits to confirm the statement now passes the structural checks.
Once the query checks out, copy it into your MySQL client, script, or application code with confidence in its basic structure.