Question

I have Price column in my SQLite table (OrderTable). I want to add all the values in Price column, so that I can have the total price.

For example Price column has 3 values :

150.00  
250.00  
300.00 

How can I get the total amount (700.00) using SQLite query?

Answer 1

total(X) where x is the column name. Click here to know more about math function in sqlite.

SELECT total(Price) AS TOTAL_PRICE FROM OrderTable; // will result float value

SELECT sum(Price) AS TOTAL_PRICE FROM OrderTable // will result int value

SAMPLE

CREATE TABLE OrderTable (Price Integer);
INSERT INTO OrderTable VALUES (1);
INSERT INTO OrderTable VALUES (2);
INSERT INTO OrderTable VALUES (3);
INSERT INTO OrderTable VALUES (NULL);  // NULL

SELECT total(Price) AS TOTAL_PRICE FROM OrderTable;  // output 6.0

SELECT sum(Price) AS TOTAL_PRICE FROM OrderTable     // output 6

From the reference

The sum() and total() aggregate functions return sum of all
non-NULL values in the group.

If there are no non-NULL input rows
then sum() returns NULL but total() returns 0.0.

NULL is not normally a helpful result for the sum of no rows but the
SQL standard requires it and most other SQL database engines implement
sum() that way so SQLite does it in the same way in order to be
compatible. The non-standard total() function is provided as a
convenient way to work around this design problem in the SQL language.

The result of total() is always a floating point value. The result of
sum() is an integer value if all non-NULL inputs are integers. If any
input to sum() is neither an integer or a NULL then sum() returns a
floating point value which might be an approximation to the true sum.

Sum() will throw an “integer overflow” exception if all inputs are
integers or NULL and an integer overflow occurs at any point during
the computation. Total() never throws an integer overflow.