How to query with multiple conditions in PHP search box? ?

I am new to PHP. When writing the content of the search box, I found that I cannot query multiple conditions at the same time. Could anyone please give me some ideas on how to write it? Thank you very much. The following is the PHP content written: <?php

逆向行走 2019-06-20 16:48:02 0  3  1883

javascript - How to determine the drawn graphics under CANVAS

How do I judge what I am drawing on the canvas? For example, I use lines to draw a heart or a V. . How to determine whether it is heart or V? . And judge the similarity between two people's paintings. The condition can be one stroke, not multiple strokes

PHP中文网 2017-05-16 13:27:54 0  2  654

How to add conditional styles in Vue.js using methods?

I want to add conditional styles in child component based on prop value passed from parent component. Here is a working example of conditional styling: <liv-bind:class="[booleanValue?'stylingClassOne':'stylingClassTwo']" But this only works when my style is based on a single variable an...

P粉327903045 2024-03-21 20:53:17 0  1  428

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  513

How to update/delete two or more specified pieces of data

How to update/delete two or more specified pieces of data? All I know now is that multiple pieces of data with the same conditions can be deleted at the same time. But I don’t know how to delete multiple specified pieces of data at the same time. For example: I want to delete two pieces of data with...

王先生 2019-10-31 11:26:08 0  2  1246

php - Multi-condition filtering requirements in e-commerce websites

The thinkphp framework used {code...} I wrote it like this, but it cannot use multiple conditions and multiple selection queries. Please tell me how to write sql. The best way to write tp sql.

世界只因有你 2017-05-18 10:46:17 0  3  589

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  576

Inner join to the same table using filter position

Thanks for helping me, I'm still learning SQL. I have a main table called JEDI and I'm trying to get specific information on using InnerJOIN and Where conditions. Specifically, I want to get the number of JEDIs that visited a specific planet between specific dates and their level. I then want to use...

P粉278379495 2024-02-03 18:57:36 0  2  469

java - database query multiple tables

Prerequisite oralce, mybatis now has multiple tables. I now need to count the amount of information in each table, that is, count(*). My current method is to write multiple methods, such as in mapper: long selectCountA; long selectCountB; long selectCountC ; In this case, I want to...

習慣沉默 2017-05-18 10:45:06 0  4  801

SELECTING with multiple WHERE conditions on the same column

Okay, I think I might be overlooking something obvious/simple here... but I need to write a query that only returns records that match multiple criteria on the same column... My table is a very simple Link settings for applying flags to users...IDcontactidflagflag_type-------------------------------...

P粉384366923 2023-08-23 19:08:16 0  2  444

javascript - In the for traversal loop, how to make the result alert after else pop up only once?

In a for loop, when the previous two if conditions are not met, an alert prompt box will pop up. Due to the traversal query, the alert will pop up multiple times according to the number of arrays. Please tell me how to truncate this, so that it can only be judged. Pop up once? {Code...} Currently, w...

黄舟 2017-05-19 10:40:28 0  3  1063

javascript - Nested traversal of map and forEach, how to return an array?

Application scenario The filtering of a table may involve multiple filtering conditions. This.filter stores an object of the v-model state of all filtering conditions. this.tableData is an array of all original table data obtained from the backend. this.filteredTableData is the filtered table...

曾经蜡笔没有小新 2017-05-19 10:21:54 0  7  1033

javascript - How to write a vue UI framework?

Is there a complete tutorial, or should I write it directly under vue-cli? Similar to element-ui or iview. I already know how to write a single Vue plug-in. How to integrate and package multiple plug-ins together? // toast.js {code...} How to combine multiple plug-ins like this...

習慣沉默 2017-06-05 11:13:48 0  1  740

Atomic reads and updates with concurrent worker threads in MySQL

Let's say I have multiple workers that can read and write to a MySQL table (eg jobs) at the same time. The task of each worker is to find the oldest queued job, set its status to RUNNING and return the corresponding ID. Note that when the worker runs step #1, there may not be any jobs that qualify (...

P粉239164234 2023-12-21 13:38:51 0  2  477

Conditions inside the for loop

Why is the condition in the for loop i<item.length? This is the loop condition, which is equivalent to how many small selection boxes there are. Why is the length .length? Shouldn't it be a number?

**秒创 2018-12-22 16:17:01 0  0  975

If group_concat does not return a value, is there any solution?

I wrote a query to convert several rows into columns based on a condition. However, there are cases where no rows satisfy the condition, but I want some results returned. Below is an example of the table and the results I'm looking for. Source table: idrespondent_id Demographic question answer 11 ch...

P粉212971745 2023-08-30 19:44:24 0  2  588

JavaScript code that prevents form submission

One way to stop form submission is to return false from your JavaScript function. When the submit button is clicked, a validation function is called. I have a condition in form validation. If that condition is met, I call a function called returnToPreviousPage();. functionreturnToPreviousPage(){wind...

P粉163465905 2023-08-20 13:58:50 0  2  520

mongodb array query - How to filter subdocuments when querying MongoDB?

There is a document that contains a subdocument, roughly as follows: {code...} The current need is how to use PHP 7 to query the number of matches based on plate_number & lev_code. Another question is how to match the subdocument that meets the conditions. document? {code...}

阿神 2017-06-10 09:48:08 0  1  922

mysql cascade query

table A :suittable B :suit_goods Related conditions: suit.suit_id = suit_goods.suit_id Corresponding relationship: A =&gt; Multiple B SQL select How to achieve the above result? ? ? Please enlighten me. Result: When a record is associated with the suit_goods table, first this record is retained....

某草草 2017-06-22 11:54:37 0  3  928

javascript - How does js determine that the input value is a number, not less than or equal to 0, without using alert, but using red font on the same line to prompt the user

How does js determine that the input value is a number, not less than or equal to 0, and can be a decimal. If the conditions are not met, the user will be prompted in red words after %, TKS!

世界只因有你 2017-06-28 09:27:53 0  4  1426