这是我的查询构建器。但是显示错误
错误=＆gt; count（）：参数必须是数组或实现的对象 可列
{{ user.last_login }}任何人都可以找出我的问题吗？
答案 0 :(得分：0)
使用LongStream a = LongStream.iterate(286, i->i+1).map(i -> Math.multiplyExact(i, i+1)/2);
LongStream b = LongStream.iterate(166, i->i+1).map(i -> Math.multiplyExact(i, 3*i-1)/2);
LongStream c = LongStream.iterate(144, i->i+1).map(i -> Math.multiplyExact(i, 2*i-1));
OfLong aIter = a.iterator();
OfLong bIter = b.iterator();
OfLong cIter = c.iterator();
long aVal = aIter.nextLong();
long bVal = bIter.nextLong();
long cVal = cIter.nextLong();
while (aVal != bVal || bVal != cVal) {
long min = Math.min(Math.min(aVal, bVal), cVal);
if (aVal == min)
aVal = aIter.nextLong();
if (bVal == min)
bVal = bIter.nextLong();
if (cVal == min)
cVal = cIter.nextLong();
}
System.out.println(aVal);
DB::raw("count(pams_project.dev_id) as count")但请务必使用$project = DB::table('pams_project')
->join('pams_developer', 'pams_project.dev_id', '=', 'pams_developer.id')
->select(array('pams_developer.developer_name',DB::raw("count(pams_project.dev_id) as count")))
->get();
。
如果你想获得收集的数量，你可以简单地使用GroupBy()
希望这有帮助