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mysql_query
mysql_query(sql_query[, link_id])
This function executes the specified MySQL query (sql_query)
on the currently selected database.If the MySQL connection identifier (link_id) is not
specified, PHP will use the currently active connection. If no such connection
exists, PHP will attempt to open a connection by implicitly calling mysql_connect with
default parameters.If the query fails, an error message to that effect will be displayed
unless '@' is added to the beginning of the function name,
and the function will return false instead of a result
identifier (which evaluates to true). If the error occurred
due to an error in the SQL query, the error number and message can be obtained
using mysq_errno and mysql_error respectively.
