altered syntax to work with postgres

[trbouma]

I got the following error when attempting to connect to postgres. The error has to do with a syntax variation of where AS should be placed. I fixed by moving the AS clause. It now works with postgres and I tested with SQLite

2023-11-16 14:26:06.96 | ERROR | psycopg2.errors.SyntaxError: subquery in FROM must have an alias
LINE 3:             SELECT COALESCE(SUM(s), 0) AS balance FROM (
                                                               ^
HINT:  For example, FROM (SELECT ...) [AS] foo.


The above exception was the direct cause of the following exception:

sqlalchemy.exc.ProgrammingError: (psycopg2.errors.SyntaxError) subquery in FROM must have an alias
LINE 3:             SELECT COALESCE(SUM(s), 0) AS balance FROM (
                                                               ^
HINT:  For example, FROM (SELECT ...) [AS] foo.

[SQL: 
            CREATE VIEW balance_issued AS
            SELECT COALESCE(SUM(s), 0) AS balance FROM (
                SELECT SUM(amount) AS s
                FROM promises
                WHERE amount > 0
            );
        ]
(Background on this error at: http://sqlalche.me/e/13/f405)

2023-11-16 14:26:06.96 | ERROR | Application startup failed. Exiting.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fa5193c) 66.31% compared to head (f091faf) 66.00%.

❗ Current head f091faf differs from pull request most recent head ff1824d. Consider uploading reports for the commit ff1824d to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #365      +/-   ##
==========================================
- Coverage   66.31%   66.00%   -0.31%     
==========================================
  Files          68       68              
  Lines        5219     5160      -59     
==========================================
- Hits         3461     3406      -55     
+ Misses       1758     1754       -4     

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