diff --git a/amex-2022-10-20/0_setup/db.db b/amex-2022-10-20/0_setup/db.db
index e69de29..4cfce5a 100644
Binary files a/amex-2022-10-20/0_setup/db.db and b/amex-2022-10-20/0_setup/db.db differ
diff --git a/amex-2022-10-20/0_setup/main.go b/amex-2022-10-20/0_setup/main.go
index 57f13e3..2953b4e 100644
--- a/amex-2022-10-20/0_setup/main.go
+++ b/amex-2022-10-20/0_setup/main.go
@@ -21,6 +21,7 @@ func main() {
 	}
 
 	query := strings.Trim(strings.TrimSpace(*q), ";") + ";"
+	log.Printf("%s", query)
 
 	if strings.HasPrefix(strings.ToUpper(strings.TrimSpace(query)), "SELECT") {
 		rows, err := db.Query(query)
@@ -44,11 +45,12 @@ func main() {
 			if err := rows.Scan(ptrs...); err != nil {
 				panic(err)
 			}
+			result := make([]string, len(columns))
 			for i := range ptrs {
 				ptr := ptrs[i].(*interface{})
-				columns[i] = fmt.Sprint(*ptr)
+				result[i] = fmt.Sprintf("%s:%+v", columns[i], *ptr)
 			}
-			log.Println(columns)
+			log.Println(result)
 		}
 	} else {
 		stmt, err := db.Prepare(query)
diff --git a/amex-2022-10-20/0_setup/mvp.sh b/amex-2022-10-20/0_setup/mvp.sh
new file mode 100644
index 0000000..a310e7a
--- /dev/null
+++ b/amex-2022-10-20/0_setup/mvp.sh
@@ -0,0 +1,51 @@
+#! /bin/bash
+
+main() {
+   set -e
+   set -o pipefail
+
+   local bin=./0_setup
+   local cmds=(
+      'DROP TABLE IF EXISTS a'
+      'CREATE TABLE a(
+         x INT,
+         y VARCHAR(20),
+         PRIMARY KEY (x)
+      )'
+      'DROP TABLE IF EXISTS b'
+      'CREATE TABLE b(
+         x INT,
+         y VARCHAR(20),
+         PRIMARY KEY (x)
+      )'
+      'SELECT * FROM a'
+      'INSERT INTO a
+         (x, y)
+         VALUES
+         (4, "a")
+      '
+      'SELECT * FROM a'
+      'SELECT * FROM b'
+      'INSERT INTO b
+         (x, y)
+         VALUES
+         (5, "b")
+      '
+      'SELECT * FROM b'
+      'UPDATE b
+         SET x=4
+         WHERE y="b"
+      '
+      'SELECT * FROM b'
+      'SELECT * FROM a JOIN b WHERE a.x == b.x'
+      'SELECT a.y, b.y FROM a JOIN b WHERE a.x == b.x'
+   )
+
+   for cmd in "${cmds[@]}"; do
+      echo =================
+      $bin -q "$cmd"
+      echo
+   done
+}
+
+main "$@"