SQL query for adding up columns - mysql

Question

| ORDERID | subtotal |
--------------------
| 1000 | 50 |
| 1000 | 100 |
| 1001 | 75 |
Need a query that sum up all the prices when the orderid is 1000 and return 150.
I've tried sum function with where clause but its not working.
Here is my code:
public double findTotalSubtotal(String order_id) {
double sum = 0 ;
PreparedStatement ps;
try {
ps = connect.prepareStatement("select sum(subtotal) from order where ORDERID = ?");
ps.setString(1,order_id);
ResultSet rs = ps.executeQuery();
while (rs.next()) {
int c = rs.getInt(1);
sum = sum + c;
}
}catch(Exception ex) {
ex.printStackTrace();
}
return sum;
}
Any my error:
You have an error in your SQL syntax; check the manual that corresponds to
your MariaDB server version for the right syntax to use near 'order where
ORDERID = '1000'' at line 1

Answer 1

Edited to include actual table name.
With the additional info of what your table name is, I can see what the problem is. "order" is a SQL keyword, so you can't use it as-is as a table name in a query. You have to surround it with square brackets backtics (because MariaDB):
select sum(price) from `order` where ORDERID = 1000
This assumes that the price is stored as a numerical type. Normally that's a pretty safe assumption, but if you're storing it as a VARCHAR, this won't work (and you should probably change the table structure to use a more appropriate type).