Common SQL Errors and How to Fix Them
Browse all documented SQL errors with detailed explanations, root causes, and step-by-step fixes.
SQL Error: Column 'age' not found in table 'users'.
This error occurs when SQL tries to select, insert, update or delete a column that does not exist in the specified table…
Invalid use of subquery in FROM clause
This error occurs when the subquery used in a FROM clause does not return a result set, or when the subquery is not corr…
The 'query_builder' instance is missing the 'connection' parameter
This error occurs when trying to use the query builder functionality without properly setting up the connection to the d…
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'username' in 'field list
This error occurs when you try to select a column that does not exist in the table. This can happen when you misspell th…
SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or ser
This error occurs when the database connection is unable to establish a connection to the server, typically due to a net…
SQL Error [1064] (42000): You have an error in your SQL syntax; check the manual
This error occurs when the SQL syntax is incorrect, making it difficult for the database management system (DBMS) to und…
SQLSTATE[HY000][1043] Unknown database 'my_database'
This error occurs when the database connection is established successfully, but the database specified in the connection…
Invalid connection pool size. Minimum value is 1. The specified value '0' is out
This error occurs when the application attempts to create a connection pool with a size that is less than the minimum al…
SQL syntax error: missing closing parenthesis in the WHERE clause of a subquery
A syntax error occurs when the SQL parser is unable to parse the SQL statement due to incorrect syntax, such as missing …
SQLSTATE[HY000][1049] Unknown database 'my_database_name'
This error occurs when the database name provided in the SQL query is unknown or does not exist in the MySQL server's da…
SQL Error (1222): The following SQL statement failed to execute: 'ALTER TABLE or
This error occurs when a SQL statement is executed that attempts to modify a table that does not exist, or a column that…
Error executing query: 'SQLSTATE[HY000] [2002] No such file or directory' while
This error occurs when the SQL framework is unable to connect to the database due to a missing or incorrect database fil…
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