Add alia api: As(alia) (#62)

README.md

@@ -155,9 +155,9 @@ func main() {
 		Select("p.id").
 		FromX(func(sb *FromBuilder) {
                     sb.
-                        Sub(sub).Alia("p").
-                        JOIN(INNER).Of("t_dog").Alia("d").On("d.pet_id = p.id").
-                        JOIN(LEFT).Of("t_cat").Alia("c").On("c.pet_id = p.id").
+                        Sub(sub).As("p").
+                        JOIN(INNER).Of("t_dog").As("d").On("d.pet_id = p.id").
+                        JOIN(LEFT).Of("t_cat").As("c").On("c.pet_id = p.id").
                             Cond(func(on *ON) {
                                 on.Gt("c.id", ro.MinCatId)
                             })

builder_x.go

@@ -79,7 +79,7 @@ func (x *BuilderX) From(orFromSql string) *BuilderX {
 	return x
 }
 
-func (x *BuilderX) Alia(alia string) *BuilderX {
+func (x *BuilderX) As(alia string) *BuilderX {
 	x.alia = alia
 	return x
 }

from_builder.go

@@ -33,7 +33,7 @@ func (sb *FromBuilder) Of(tableName string) *FromBuilder {
 	return sb
 }
 
-func (sb *FromBuilder) Alia(alia string) *FromBuilder {
+func (sb *FromBuilder) As(alia string) *FromBuilder {
 	sb.x.alia = alia
 	return sb
 }