MySQL Error 1054: Why is my UPDATE query failing due to an 'unknown column'?

MySQL UPDATE query error 1054: 'Unknown column in field list'

If you encounter error #1054 when executing a MySQL UPDATE query, there is a problem with the Field List. Here’s how to fix it:

Check the corrected query:

The provided query attempts to update the fellow column, but uses a backtick (`) as the identifier quote character. Values ​​and identifiers should be quoted using double or single quotes instead:

<code class="language-sql">UPDATE MASTER_USER_PROFILE, TRAN_USER_BRANCH
SET MASTER_USER_PROFILE.fellow = 'y'
WHERE MASTER_USER_PROFILE.USER_ID = TRAN_USER_BRANCH.USER_ID
AND TRAN_USER_BRANCH.BRANCH_ID = 17;</code>

Understand identifier quote characters:

Identifier quote characters (backticks) are used to enclose column or table names. Instead, double or single quotes are used to enclose a value, string, or phrase. In this case, 'y' should be in double or single quotes, not backticks.

Reference document:

Please refer to the MySQL 8 documentation for more guidance on identifier quote characters and their usage: https://www.php.cn/link/b6121869d1d9e7fddaac06016fcb0661

Conclusion:

For successful MySQL UPDATE queries, correct use of reference conventions for values ​​and identifiers is critical. Make sure column names are enclosed in backticks, and values ​​and phrases are enclosed in double or single quotes.

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