Access denied for user ‘username’@‘localhost’ (using password: YES) - This error occurs when the user does not have the necessary permissions to access the database.

Table ‘tablename’ doesn’t exist - This error occurs when the specified table does not exist in the database.

Syntax error near ‘query’ - This error occurs when there is a syntax error in the SQL query being executed.

Out of memory - This error occurs when the server runs out of memory while processing a query.

Duplicate entry ‘value’ for key ‘keyname’ - This error occurs when trying to insert a duplicate entry into a column that has a unique constraint.

Can’t connect to MySQL server on ‘hostname’ - This error occurs when the client is unable to connect to the MySQL server.

Error 1064: You have an error in your SQL syntax - This error occurs when there is a syntax error in the SQL query being executed.

Error 1045: Access denied for user ‘username’@‘localhost’ (using password: YES) - This error occurs when the user does not have the necessary permissions to access the database with the provided credentials.

Error 2002: Can’t connect to local MySQL server through socket ‘/var/run/mysqld/mysqld.sock’ - This error occurs when the MySQL server is not running or the socket file specified in the configuration is incorrect.

Error 1054: Unknown column ‘columnname’ in ‘field list’ - This error occurs when trying to access a column that does not exist in the specified table.