diff --git a/server/internal/db/query.go b/server/internal/db/query.go
index 192e848..fcec089 100644
--- a/server/internal/db/query.go
+++ b/server/internal/db/query.go
@@ -266,7 +266,7 @@ func (q *Query) Placeholder(arg any) *Query {
 func (q *Query) Placeholders(n int) *Query {
 	placeholders := make([]string, n)
 
-	for i := 0; i < n; i++ {
+	for i := range n {
 		q.pos++
 		if q.dbType == DBTypePostgres {
 			placeholders[i] = fmt.Sprintf("$%d", q.pos)
@@ -279,6 +279,14 @@ func (q *Query) Placeholders(n int) *Query {
 	return q
 }
 
+func (q *Query) TimeSince(days int) string {
+	if q.dbType == DBTypePostgres {
+		return fmt.Sprintf("NOW() - INTERVAL '%d days'", days)
+	}
+
+	return fmt.Sprintf("datetime('now', '-%d days')", days)
+}
+
 // AddArgs adds arguments to the query
 func (q *Query) AddArgs(args ...any) *Query {
 	q.args = append(q.args, args...)