# retrieve individual rows
$query = qq|SELECT c.accno, t.taxkey AS accnotaxkey, a.amount, a.memo,
a.transdate, a.cleared, a.project_id, p.projectnumber,(SELECT p.projectnumber FROM project p
- WHERE a.project_id = p.id) AS projectnumber, a.taxkey, t.rate AS taxrate, t.id, (SELECT c1.accno FROM chart c1, tax t1 WHERE t1.id=t.id AND c1.id=t.chart_id) AS taxaccno, t.id AS tax_id
+ WHERE a.project_id = p.id) AS projectnumber, a.taxkey, t.rate AS taxrate, t.id, (SELECT c1.accno FROM chart c1, tax t1 WHERE t1.id=t.id AND c1.id=t.chart_id) AS taxaccno, (SELECT tk.tax_id FROM taxkeys tk WHERE tk.chart_id =a.chart_id AND tk.startdate<=a.transdate ORDER BY tk.startdate desc LIMIT 1) AS tax_id
FROM acc_trans a
JOIN chart c ON (c.id = a.chart_id)
LEFT JOIN project p ON (p.id = a.project_id)