Does it check actual MySQL syntax (SELECT, JOIN, etc.)?

No. This is a practical checker focused on matching parentheses and quotes rather than a full SQL parser. For accurate syntax validation, run it against a real DB.

Are parentheses inside comments checked too?

No. The contents of -- and /* */ comments are excluded from checking.

Is the query I enter sent to a server?

No. It's checked entirely in your browser.

Is this the same as a real MySQL syntax check?

No — it only checks bracket and quote balance. Verify real syntax with EXPLAIN or a test server.

How do I put a quote inside a quoted string?

Double it ('') or escape with a backslash (\').

🗄️ MySQL Syntax Checker

Checks whether the parentheses in your MySQL query are matched and whether quotes are properly closed.

⚠️ Practical checker — not a full SQL-parser-based syntax check, focused on matching parentheses and quotes

SQL Query

How to use

Enter your SQL query.
Click "Check".
The result shows whether parentheses and quotes are matched.

🎯 Use Cases

Catch mismatched parentheses after writing a long query
Find unclosed string literals in quotes
Sanity-check basic syntax before pasting a query in

Example

Input

SELECT id, name
FROM users
WHERE role IN ('admin', 'editor';

Output

• 3번째 줄: '(' 가 닫히지 않았습니다

The opening parenthesis '(' after IN on line 3 is never closed before the semicolon, so the checker reports the unmatched parenthesis with its line number (the message reads: "line 3: '(' is not closed").

MySQL quoting & identifiers

Each quote type means something different in MySQL. This is a practical checker for bracket and quote balance only.

Notation	Role
Single quote `'`	String literals — 'value'
Double quote `"`	Strings by default; identifiers under ANSI_QUOTES mode
Backtick `	Table/column identifiers — required for reserved words
Comments	`--` and `#` line comments, `/* */` blocks

FAQ

Does it check actual MySQL syntax (SELECT, JOIN, etc.)?: No. This is a practical checker focused on matching parentheses and quotes rather than a full SQL parser. For accurate syntax validation, run it against a real DB.
Are parentheses inside comments checked too?: No. The contents of -- and /* */ comments are excluded from checking.
Is the query I enter sent to a server?: No. It's checked entirely in your browser.
Is this the same as a real MySQL syntax check?: No — it only checks bracket and quote balance. Verify real syntax with EXPLAIN or a test server.
How do I put a quote inside a quoted string?: Double it ('') or escape with a backslash (\').