php - Synchronize data between two tables

Table A and Table B (Table B wants to synchronize the data in Table A. The account field in Table A is the same as the account field in Table B. The condition for synchronization is that when the account field exists in Table A but not in Table B, then The account field in table A needs to be taken ...

天蓬老师 2017-07-03 11:40:18 0  1  864

How to synchronize development and production databases

Do you know of any application that synchronizes two databases - during development sometimes you need to add a table row or two or a new table or column. Normally I write each sql statement to some file and execute the lines on my production database during the upload path (backing it up before). I...

P粉520204081 2023-10-22 23:37:30 0  1  727

Sync by PivotTable ID instead of Model ID

I want to update order products by pivot id using sync method because in my scenario an order can have multiple products with the same id and I want to update the product whose pivot id I am calling and delete other products which I have not updated , but you know from the sync syntax that it accept...

P粉121447292 2024-02-17 15:02:30 0  1  465

php - Data synchronization between mini program and official account

There is a project that was previously developed based on the WeChat public account. Now, how to synchronize the data of the two people when making a small program? What about the WeChat public account that obtains user information through authorization? What about the IDE small program?

ringa_lee 2017-06-05 11:08:13 0  1  642

javascript - vue asynchronous data printing problem

After a component obtains data asynchronously and renders it, when you click the browser's print function, all asynchronous data is not displayed on the printout. {code...}

欧阳克 2017-06-26 10:55:10 0  1  745

How to publish SQLite database data to an online MySQL database in Flutter?

How to sync offline SQLite to MySQL online database in Flutter? Any suggestions?

P粉590428357 2023-11-10 12:36:40 0  2  858

I have two different data coming from javascript and I want to display both data in the same cell in the same row

I have two different data coming from javascript and I want to display both data in the same cell in the same row

P粉787806024 2023-07-22 16:17:09 0  1  554

How to solve the problem of mysql master-master synchronization and slave database out-of-synchronization?

There are now 3 mysql instances mysql-m1 mysql-s1 mysql-m2 mysql-m1 and mysql-s1 have a master-slave relationship. All operations in mysql-m1 will be synchronized to mysql-s1, and then I configured another mysql-m2. As the master-master relationship with mysql-m1, inserting data in mysql-m2 will be ...

ringa_lee 2017-05-24 11:33:07 0  2  755

javascript - There is a function A that obtains data asynchronously. Do other functions that rely on the data obtained by A must be asynchronous?

Now the situation is like this, function a returns data asynchronously from Promise, and many other functions need to use this data. Now every function that relies on this data needs to process a().then() like this {code...} Among them are Some recursive circular dependencies. After the complexity i...

黄舟 2017-07-05 11:05:24 0  3  945

mysql - Why does database read-write separation improve database performance?

Please see the blog above for why read-write separation can improve database performance. According to database common sense, read-write separation can indeed improve database performance, but you don't know if you understand its underlying principles. For example, one reads and one writes, but the ...

PHPz 2017-05-24 11:34:46 0  2  1297

How to use Ajax to upload data and files at the same time?

I'm using jQuery and Ajax to submit data and files but I'm not sure how to send both data and files in one form? I'm currently using both methods almost the same way, but the way of collecting the data into an array is different, data uses .serialize(); while files use =newFormData($(this)[0]); is i...

P粉012875927 2023-08-20 14:33:32 0  2  738

Migrate data from one database to another

I need to migrate data from one database to another, both on the same local system. The table and column names are different and I don't have to migrate all the columns from the old database, so Select* doesn't work for me. INSERTINTONewDatabase.table1(Column1,Column2);SELECToldDatabase.table1(colum...

P粉509383150 2023-08-24 09:58:47 0  2  665

javascript - What database does electron app use?

I want to use Electron to develop a desktop app, which requires data persistence. The data to be stored is a document, which is stored locally and supports cloud synchronization. Now I want to develop the data storage function, and I see that there are so many databases to choose from. I hope you ca...

黄舟 2017-06-12 09:30:18 0  3  782

Caching reporting data in the same transaction database vs using a data warehouse

We have a SaaS solution where each tenant has its own MySQL database. Now I'm designing a dashboard for this SaaS system and it requires some analytical charts. To obtain the data required for the chart, we can query each tenant's transaction data in real time from its database. and get updated grap...

P粉511749537 2024-02-26 19:20:23 0  1  385

javascript - react uses fetch to accept data.

The front-end interface was built using the react framework. Now it is necessary to determine the user type based on the data sent from the background to display different interfaces. However, a problem was discovered during the actual operation, that is, the data requested by fetch is asynchronous....

某草草 2017-05-19 10:12:19 0  2  972

How to find the same data in certain fields

For example, I want to query only the duplicate data of a certain field in the database. How to query? Or how to do it with PHP? As shown in the picture below, Zhang **’s name, phone number, province, city, etc. are all listed in the same way. There may be multiple records for Zhang San.

Bob pang 2020-03-13 12:24:57 0  2  1190

PHP wants to use queues to export very large data from the database and download it. How to achieve this?

Using PHP, there are millions of data in the database, but it cannot be found directly. It also requires complex calculations and exporting after calculation. So I want to use queues to solve this problem, or there are other ideas. And you can use ajax to monitor queue execution. Note: It doesn’t ha...

阿神 2017-05-24 11:34:20 0  3  848

symfony - Unique Constraint How to determine that the same data already exists before saving?

{Code...} I only check whether there is already the same data in the current database, but there are already several data that are the same in the data being inserted. So during the insertion operation, the following information is given: An exception occurred while executing ' INSERT INTO workflow ...

大家讲道理 2017-05-16 16:44:44 0  2  779

I opened the mc server but the data will not be synchronized across the server.

How to synchronize? Please teach me. QQ 3203749095 Mobile number 13736876595

无聊的萝卜 2018-09-22 19:12:22 0  1  1074

Database data

Could you please provide the database data?

虾米 2021-01-12 10:59:30 0  0  1123