给出以下sqlfiddle：http://www.sqlfiddle.com/#!17/f483a/2/0
create table test (
start_date date
);
insert into test values ('2019/01/01');
select
start_date,
age(now()::date,start_date) as date_diff
from test;
哪个生成以下输出：
date_diff | 0 years 7 mons 27 days 0 hours 0 mins 0.00 secs
我该如何生成正确的日历天数
239 days
不使用自定义功能？
答案 0 :(得分：2)
请勿使用年龄功能。 import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
backgroundColor: Colors.blue,
body: MoveContainer(),
),
);
}
}
class MoveContainer extends StatefulWidget {
@override
_MoveContainerState createState() => _MoveContainerState();
}
class _MoveContainerState extends State<MoveContainer> {
Offset offset = Offset.zero;
final double height = 200;
final double width = 200;
@override
Widget build(BuildContext context) {
return GestureDetector(
onPanStart: (details) {
RenderBox getBox = context.findRenderObject();
setState(() {
offset = getBox.localToGlobal(details.globalPosition);
});
},
child: Stack(
children: <Widget>[
AnimatedPositioned(
duration: Duration(milliseconds: 300),
top: offset.dy - (height / 2),
left: offset.dx - (width / 2),
child: Container(
color: Colors.cyan,
height: height,
width: width,
child: Text("hello "),
),
),
],
),
);
}
}
中的Subtracting和date产生一个整数。 date返回一个now()，因此您需要改用timestamp。
current_date