The value will be an array if the request has more than two fields.
function()
{
/**
* Return an array with the values of single field resulting from the query.
*
* @param string query
* @param mixed values
* @return array
*/
public function getColArray(): array;
/**
* Return a count of identical values in a field as array, Reporting a structure type 'num' - 'val'.
*
* @param $table
* @param string|null $field
* @param array $where
* @param array $order
* @return array|null
*/
public function countFieldValues($table, string $field = null, array $where = [], array $order = []): ?array;
/**
* Return a numeric indexed array with the values of the unique column ($field) from the selected $table
*
* ```php
* X::dump($db->getColumnValues('table_users','surname',['id','>',1]));
* /*
* array [
* "Smith",
* "Jones",
* "Williams",
* "Taylor"
* ]
* ```
*
* @param string|array $table The table's name or a configuration array
* @param string|null $field The field's name
* @param array $where The "where" condition
* @param array $order The "order" condition
* @param int $limit
* @param int $start
* @return array
*/
public function getColumnValues($table, string $field = null, array $where = [], array $order = [], int $limit = 0, int $start = 0): ?array;
/**
* Return an indexed array with the first result of the query or false if there are no results.
*
* @param string $query
* @return array|false
*/
public function fetch(string $query);
/**
* Return an array of indexed array with all results of the query or false if there are no results.
*
* @param string $query
* @return array|false
*/
public function fetchAll(string $query);
/**
* @param $query
* @param int $num
* @return mixed
*/
public function fetchColumn($query, int $num = 0);
/**
* @param $query
* @return bool|\stdClass
*/
public function fetchObject($query);
/**
* @return array
*/
public function getCfg(): array;
/**
* Gets the created hash.
*
* @return string
*/
public function getHash(): string;
/**
* Checks if the database is ready to process a query.
* @return bool
*/
public function check(): bool;
/**
* Sets the error mode.
*
* @param string $mode
*/
public function setErrorMode(string $mode);
/**
* @return string
*/
public function getErrorMode(): string;
/**
* Returns the last error.
*
* @return string|null
*/
public function getLastError(): ?string;
/**
* Returns the current database selected by the current connection.
*
* @return string|null
*/
public function getCurrent(): ?string;
/**
* Returns the host of the current connection.
*
* @return string|null
*/
public function getHost(): ?string;
/**
* @return string
*/
public function getConnectionCode();
/**
* Return the last config for this connection.
*
* @return array|null
*/
public function getLastCfg(): ?array;
/**
* @param array $cfg The user's options
* @return array|null The final configuration
*/
}
