Add delete query

lib/src/util/query_builder.dart

@@ -44,6 +44,8 @@ abstract class Query {
   final String from;
   final String? alias;
 
+  String get aliasOrEmpty => alias ?? '';
+
   Query(this.from, {this.alias});
 
   Sql build();
@@ -158,6 +160,24 @@ class UpdateQuery extends Query with _WhereQuery {
   }
 }
 
+class DeleteQuery extends Query with _WhereQuery {
+  DeleteQuery(super.from);
+
+  @override
+  Sql build() {
+    if (_andWheres.isEmpty && _orWheres.isEmpty) {
+      throw QueryBuilderException("Delete query requires where statement");
+    }
+
+    final buffer = StringBuffer("DELETE FROM $from $aliasOrEmpty ");
+
+    _buildWheres(buffer);
+    buffer.write(";");
+
+    return Sql.named(buffer.toStringClean());
+  }
+}
+
 class SelectQuery extends Query with _WhereQuery, _JoinQuery {
   final List<String> _selects = [];
 

test/query_builder_test.dart

@@ -115,5 +115,13 @@ void main() {
         expect(query.build().asString(), "INSERT INTO test (name,model) VALUES (moron,@model) RETURNING id;");
       });
     });
+
+    group("Delete tests", () {
+      test("Simple delete", () {
+        final query = DeleteQuery("test")..andWhere("name = 'test'");
+
+        expect(query.build().asString(), "DELETE FROM test WHERE name = 'test';");
+      });
+    });
   });
 }