Question

我想从现有表中删除响应特定时间范围的条目（如果它们存在于此表中），然后计算它们并将它们插入到该表中。如果它们不存在则创建它们并仅插入到表中。怎么可能这样做？谁能举个例子吗？表结构应如下：

create table test_table 
(
   [Date] float
  ,[UserName] nvarchar(max)
  ,[SessionType] int
  ,[Duration] float
  ,[MessageCount] int
)

Answer 1

如果你有一个存储DATE和TIME的列，那么你可以根据它删除记录。

假设我的表上有一个名为CreateDate的列。然后我可以删除所有通过Just Giving在上午10点到11点之间创建的记录

DELETE FROM MyTable WHERE 
CreateDate BETWEEN '2018-01-12 10:00:00.000' AND '2018-01-12 11:00:00.000'

现在使用Normal INSERT语句再次插入值

Answer 2

你可以按照这样的步骤进行

首先将时间范围内的记录集存储在临时表

中

import express from 'express';
const router = express.Router();
import User from '../models/user.model';
import UserCtrl from '../controllers/user.controller';

module.exports = (jwt, app, passportGoogle) => {
    /* GET api listing. */
    router.get('/', (req, res) => {
        UserCtrl.getUsers({})
            .exec((err, users) => {
                if (err)
                    return next(err);
                res.json(users)
            })
    });

    router.get('/google',
        passportGoogle.authenticate('google', { scope: ['profile', 'email'] }));

    router.get('/google/callback',
        passportGoogle.authenticate('google', { failureRedirect: '/session/login' }),

     //HERE :  failureRedirect: '/session/login' :- it never called

        function (req, res) {
            console.log('req.user', req.user)
            // Successful authentication, redirect home.
            res.redirect('/dashboard');
        });

    return router;
}

然后从表中删除记录

SELECT * INTO tempTable FROM YourTable WHERE CONVERT(FLOAT, [Date]) BETWEEN 43100.3603763503 AND 43110.3603763503

然后根据您的要求使用DELETE FROM YourTable WHERE CONVERT(FLOAT, [Date]) BETWEEN 43100.3603763503 AND 43110.3603763503中提供的数据进行计算并将数据插入表中

tempTable

然后放下tempTable

INSERT INTO YourTable
SELECT * FROM tempTable

Answer 3

我正在更新我的解决方案，谢谢大家的帮助。

create mytable table 
(
   [Date] float
  ,[UserName] nvarchar(max)
  ,[SessionType] int
  ,[Duration] float
  ,[MessageCount] int
)
IF EXISTS (SELECT * FROM mytable WHERE [Date] >= 43082 AND [Date] < 43111)
BEGIN
DELETE FROM mytable WHERE [Date] >= 43082 AND [Date]< 43111
;WITH Data AS (
/*do the calculation of data*/
)
INSERT INTO mytable select * from Data
END
ELSE
BEGIN
;WITH Data AS (
/*do the calculation of data*/
)
INSERT INTO mytable select * from Data
END

删除特定时间范围的条目

3 个答案: