请协助我,我需要选择790,因为它在中间,但无法弄清楚。
proxy.on('proxyReq', function(proxyReq, req, res, options) {
var dataReq = new Buffer('');
req.on('data', function (data) {
// incomming post body
dataReq = Buffer.concat([dataReq, data]);
});
req.on('end', function () {
try {
// make changes
req.query = JSON.parse(dataReq.toString());
req.query.size = 1;
} catch (e) {
console.error(e.message);
}
}).on('error', (e) => {
console.error(`Got error: ${e.message}`);
});
// send new body
// req.query is undefined, because event 'data', 'end' did not fire yet
proxyReq.write(JSON.stringify(req.query))
});
提前谢谢
答案 0 :(得分:0)
这应该有助于获得您想要的东西。从表中获取平均值,然后获得与平均值差异最小的第一条记录。
SELECT TOP 1 id, value FROM yourTable
ORDER BY ABS(value - (SELECT AVG(value) FROM yourTable))
或使用变量,具体取决于表的大小
DECLARE @median DECIMAL
SELECT @median = AVG(value) FROM yourTable
SELECT TOP 1 * FROM yourTable
ORDER BY ABS( value - @median)