How to solve "subquery returns more than 1 row" error

I have a query that returns multiple rows, and another query where I want to set the condition to be any one of these multiple row values, so basically I want the subquery to look like this: select*fromtablewhereid=(multiple row query) ;The multi-row query returns multiple rows. So if the values ​​o...

P粉235202573 2023-08-21 17:36:57 0  2  548

Is it possible to concatenate multiple MySQL rows into one field?

Using MySQL, I can do something like this: SELECThobbiesFROMpeoples_hobbiesWHEREperson_id=5; My output: shoppingfishingcoding But I only want one row and one column: Desired output: shopping,fishing,coding The reason is that I am selecting multiple values ​​from multiple tables, and in After all the...

P粉556159786 2023-08-22 14:02:48 0  2  515

Execute multiple MYSQL queries using PHP

I'm trying to run consecutive MYSQL statements using PHP as shown in the code snippet below (it just copies one row to another and renames the id through the tmp table). I'm getting duplicate syntax error messages. I've tried countless iterations. The code looks like the code I've studied in the PHP...

P粉358281574 2023-10-25 11:41:44 0  1  773

Looking for a way to use models to perform multi-table related queries under TP5?

Dear masters, when I use tp5 to query multiple tables, I use the view query method, similar to Db::view('table_a')->view('table_b')->view('table_c') ->view('table_d')->view('table_e')->select(), please

阳光 2018-10-10 08:44:29 0  4  1911

javascript - FormData implements multiple file upload problems

Although we know that FormData can upload multiple files at the same time, the current needs this time are different, and each picture needs to be accompanied by some user selection parameters. for example. scope.FileList is the file array after multiple selection of files. If you upload multiple fi...

学习ing 2017-06-08 11:03:20 0  5  1126

Count the number of Laravel and Mysql related models through intermediate tables using additional conditions.

I have a MySQL query built using Laravel Eloquent's eager loading and withCount functions, but I have some performance issues when dealing with large datasets, is there any way to improve the query below? I need to get all stores and the product quantities related to the stores (via an intermediate ...

P粉514458863 2023-07-24 15:47:02 0  1  633

laravel - laravle Eloquent ORM updates multiple records at one time

Eloquent updates multiple records in batches. Instead of assigning values ​​to multiple fields in one record in batches, it makes different modifications to different records based on different conditions. Similar to batch insertion: {code...} Is there any similar statement {code...}? The function i...

phpcn_u1582 2017-05-16 16:54:58 0  1  608

Multiple meta_values ​​use the same meta_key to query posts' custom fields

Scenario: A post has multiple entries with values ​​for the same key, for example a single post will have multiple meta_key[drink]=>meta_value[drink]=>"banana juice"[drink]=>"orange juice"[drink] =>"apple juice" wants to find: posts that do not have an orang...

P粉674876385 2023-08-15 14:16:16 0  1  725

javascript - What does the following function writing mean?

A function defined in mutations in vuex calls {code...} {code...} in the component. My question is why there is no need to pass in the state parameter when calling the setCart function. Visually, if it does not If you pass the state parameter, the addCart function will automatically...

我想大声告诉你 2017-06-26 10:56:52 0  2  777

How can PHP display SQL query results through an array? There are multiple query results, as shown in the figure.

How can PHP display SQL query results through an array? There are multiple query results, as shown in the figure. I want the $date in the echo in forsearch to be an array. Instead of using $date directly, output $date[start], $date[start], $date[goal], $date[airline], $date[flight-no] separately. ,$...

杭州云庄国际******** 2020-10-19 23:03:05 0  1  1038

phpstudy configures multiple sites

After configuring this computer, multiple sites cannot be accessed. The configuration files are all configured, and there is no problem with other computers. Do the computers need to be configured with any permissions?

发展 2018-12-28 17:04:58 0  4  1250

javascript - webpack generates HTML files from multiple entry files;

Multiple entry files generate HTML files; generate HTML according to the number of entry files; for example: There are two entry files, home and about; use the html-webpack-plugin plug-in to create new; as follows: Generate HTMl according to the number of entry files ;For example: There are two entr...

怪我咯 2017-06-17 09:16:25 0  1  891

Python executes two functions at the same time

I have now customized two functions def test(): {code...} def test1(): {code...} These two functions are two functions of an infinite loop. Now I want to make these two functions Two functions are executed simultaneously in the same PY file. I wonder if the experts have any good solutions. Newbie as...

欧阳克 2017-06-22 11:52:20 0  1  994

What is the best way to write array sorting and filtering functions with multiple parameters?

There is a game directory with a list of games that go through multiple filters. Games are divided by platform (HTC, PSVR, PS5, Favorites), and when you click on a tab, a computed property is triggered, for PS5 it is showPS5Games, which accepts the selected genre (genre), sort (selectedSort)), compl...

P粉982881583 2024-01-16 23:10:56 0  1  472

Mysql returns some records as empty in date field because date has multiple formats

I am trying to analyze order_date column and the column has multiple date formats and I want to convert all these dates to the same format which will make it easier to analyze order_date. I am trying to analyze order_date but this column has multiple date formats 2019/07/15 and 1/13/2014 but while u...

P粉649990163 2024-04-06 13:29:40 0  1  674

How can PHP display SQL query results through an array? There are multiple query results, as shown in the figure. I want echo in forsearch

How can PHP display SQL query results through an array? There are multiple query results, as shown in the figure. I want the $date in the echo in forsearch to be an array. Instead of using $date directly, output $date[start], $date[start], $date[goal], $date[airline], $date[flight-no] separately. ,$...

杭州云庄国际******** 2020-10-19 22:58:03 0  1  938

Does anyone know how to modify data in multiple rows and columns in MySql? Please give me some advice.

Does anyone know how to modify data in multiple rows and columns in MySql?

天蓬老师 2017-06-06 09:51:59 0  5  795

The forEach method in Vuex's getters returns a single value instead of multiple values

I have a shopping cart which is an array of products and I want to access each name in the cart. I have a forEach function in getters but it only returns a name. I tried .map() but it returns another array and I need multiple string values. can you help? letcart=window.localStorage.getItem('cart')co...

P粉904191507 2024-03-31 23:43:14 0  1  514

mysql - How to merge group queries on multiple tables and sort them by date?

At present, four different tables are queried separately to sum up the data of each day. Please tell me how to merge and query four different sets of data for each day. The first column is sorted by date and only takes the year, month and day {code...}. The final display result is required to be as ...

为情所困 2017-05-16 13:28:13 0  1  1142

node.js - Can a single-core CPU use cluster to open multiple threads?

In order to reduce the chance of downtime. I plan to use node's cluster module to enable multi-threading. One master thread is responsible for scheduling, and multiple worker threads are responsible for processing business. Now the server's CPU only has a single-core CPU, which should be able to hav...

天蓬老师 2017-06-27 09:19:14 0  3  1062