Question

我正在设置一个触发器，该触发器读取一个timestamp列并将其添加7天，然后将新计算的日期放入同一表的另一列中。时间戳列称为date_requested，新列称为DELIMITER // CREATE TRIGGER external_requests_date_trig BEFORE INSERT ON external_requests FOR EACH ROW BEGIN SET NEW.return_date = DATE_ADD(NEW.date_requested, INTERVAL 7 DAY); END// DELIMITER ;。到目前为止，这是我的代码。预先感谢

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width>, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>CANVAS animacje</title>
    <style>
    
    body{
        margin: 0;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        height: 100vh;
    }
   
    </style>
</head>
<body>

   <canvas></canvas>
<script>

const canvas = document.querySelector('canvas');
const ctx = canvas.getContext('2d');

canvas.width = 1000;
canvas.height = 500;

let cw = canvas.width;
let ch = canvas.height;

let canvasX = 0;
let canvasY = 0;

let rectX = 0;
let rectY = ch/2;

let rectSize = 50;
let rectSizeRight = 100;
let rectSpeed = 10;

function field(){
    ctx.fillStyle = '#ddd';
    ctx.fillRect(canvasX, canvasY, cw, ch);
    window.requestAnimationFrame(field);

}

function randomColors(){
        let r = Math.floor(Math.random()*255);
        let g = Math.floor(Math.random()*255);
        let b = Math.floor(Math.random()*255);
        return 'rgb('+r+','+g+','+b+')';
        window.requestAnimationFrame(randomColors);

    }


function rect(){

    ctx.fillStyle = randomColors()
    ctx.fillRect(rectX,rectY,rectSize,rectSize);
    
    rectX+=rectSpeed; 

    
    if(rectX+rectSize == 0){
        rectSize = rectSize;
        rectSpeed=rectSpeed;
    } else if(rectX+rectSizeRight == cw){
        rectSize=rectSizeRight;
        rectSpeed = -rectSpeed;
    } ;
    window.requestAnimationFrame(rect);

    
    // if(rectX+rectSizeRight == cw){
    //     rectSize=rectSizeRight;
    //     rectSpeed = -rectSpeed
    //   } 

    

    
    //   if (rectX+rectSize <= 0){
    //       rectSize = rectSize;
    //       rectSpeed = -rectSpeed;
    //   }
    //   if(rectX+rectSizeRight>=cw){
    //       rectSize=rectSizeRight;
    //       rectSpeed = -rectSpeed;
    //   }
     }


 function animate(){
field();
rect();
randomColors();
 }

 window.requestAnimationFrame(animate);


</script>

</body>
</html>

将7天添加到时间戳记日期mysql

0 个答案: