doc: update readme to new Select struct

README.md

@@ -1,6 +1,6 @@
 # query-interpreter
 
-**README LAST UPDATED: 04-15-25**
+**README LAST UPDATED: 04-24-25**
 
     This project is under active development and is subject to change often and drastically as I am likely an idiot.
 
@@ -69,13 +69,29 @@ A `Select` object is shaped as the following:
 ```go
 type Select struct {
 	Table        string
-	Columns      []string
+	Columns      []Column
 	Conditionals []Conditional
 	OrderBys     []OrderBy
+	Joins        []Join
 	IsWildcard   bool
 	IsDistinct   bool
 }
 
+type Column struct {
+	Name              string
+	Alias             string
+	AggregateFunction AggregateFunctionType
+}
+
+type AggregateFunctionType int
+const (
+	MIN AggregateFunctionType = iota + 1
+	MAX
+	COUNT
+	SUM
+	AVG
+)
+
 //dependency in query.go
 type Conditional struct {
 	Key       string