version: 2.1.12
sum
Calculate the total value of the column.
sum($table, $column, $where)
table [string]
The table name.
column [string]
The target column will be calculated.
where (optional) [array]
The WHERE clause to filter records.
sum($table, $join, $column, $where)
table [string]
The table name.
join [array]
Table relativity for tables.
column [string]
The target column will be calculated.
where (optional) [array]
The WHERE clause to filter records.
Return: [string] The total number of the column.
$total = $database->sum("account", "money");
echo "We have $" . $total;