回答:-- 开窗函数 select sid,student_id,count(sid) over(PARTITION by student_id orderby student_id) 及格数 from score where num>= 60;
回答:[图片]
回答:$(".fr-combo-list-item.fr-combo-list-item-noselect").css("display","none"); //隐藏不选选项$(".fr-combo-list.fr-widget-background").css("height","auto"); //设置下拉框高度自适应
回答://加载结束事件var fn = () => { const style = document.createElement("style") style.innerText = ".x-text{color:rgb(193,197,216)}" document.head.appendChild(style);}fn();
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