many to many query progress (multiple joins)

demo/main.cpp

@@ -90,14 +90,14 @@ int main()
   mc.distinguished = true;
   auto insert_authors_sql = c.query(s)
     .insert()
-    .into<author>(qh::authors)
+    .into(qh::authors)
     .values(mc)
     .execute();
 
   std::cout << "SQL: " << insert_authors_sql << "\n";
 
   auto result = c.query(s)
-    .select<author>()
+    .select(qh::authors.columns)
     .from(qh::authors)
     .fetch_all();
 
@@ -115,7 +115,7 @@ int main()
   std::cout << "SQL: " << update_authors_sql << "\n";
 
   auto authors = c.query(s)
-    .select<author>()
+    .select(qh::authors.columns)
     .from(qh::authors)
     .fetch_all<author>();
 
@@ -125,18 +125,18 @@ int main()
 
   c.query(s)
     .insert()
-    .into<book>(qh::books)
+    .into(qh::books)
     .values({2, "It", mc.id, 1980})
     .execute();
 
   c.query(s)
     .insert()
-    .into<book>(qh::books)
+    .into(qh::books)
     .values({3, "Misery", mc.id, 1984})
     .execute();
 
   auto select_books_sql = c.query(s)
-    .select<book>({qh::authors.last_name})
+    .select(qh::books.columns, {qh::authors.last_name})
     .from(qh::books)
     .join_left(qh::authors)
     .on(qh::books.author_id == qh::authors.id)