add more sql keywords

orm/qb.go

@@ -34,6 +34,11 @@ type QueryBuilder interface {
 	Offset(offset int) QueryBuilder
 	GroupBy(fields ...string) QueryBuilder
 	Having(cond string) QueryBuilder
+	Update(tables ...string) QueryBuilder
+	Set(kv ...string) QueryBuilder
+	Delete(tables ...string) QueryBuilder
+	InsertInto(table string, fields ...string) QueryBuilder
+	Values(vals ...string) QueryBuilder
 	Subquery(sub string, alias string) string
 	String() string
 }