Refine the rest structure.

code/tool/builder/sql_builder.go

@@ -0,0 +1,30 @@
+package builder
+
+type OrderPair struct {
+	Key   string
+	Value string
+}
+
+type WherePair struct {
+	Query string
+	Args  []interface{}
+}
+
+func (this *WherePair) And(where *WherePair) *WherePair {
+	if this.Query == "" {
+		return where
+	} else {
+		return &WherePair{Query: this.Query + " AND " + where.Query, Args: append(this.Args, where.Args...)}
+	}
+
+}
+
+func (this *WherePair) Or(where *WherePair) *WherePair {
+	if this.Query == "" {
+		return where
+	} else {
+		return &WherePair{Query: this.Query + " OR " + where.Query, Args: append(this.Args, where.Args...)}
+	}
+
+}
+