javascript - js deletes a certain row in one list and deletes the corresponding index row in another list

RT! When a certain row in list A is clicked and a delete event is executed, and then the corresponding row in list B is deleted, I want to achieve this through the index method. But when I executed the delete event for the first time, the correct corresponding rows were deleted in the corresponding ...

学习ing 2017-06-12 09:28:30 0  3  1086

Unable to drop index required by MySQL foreign key constraint

I need to modify my existing database to add a column. Therefore, I also want to update the UNIQUE field to include that new column. I'm trying to drop the current index but keep getting the error MySQLCannotdropindexneededinaforeignkeyconstraintCREATETABLEmytable_a(IDTINYINTNOTNULLAUTO_INCREMENTPRI...

P粉882357979 2023-08-14 13:34:46 0  2  595

Make a button in html delete a row in MySql

I'm currently working on a project where I'm using nodejs to create a user, add the user to MySql in a table called "users" I want to create a button in html that deletes the currently logged in user from the mysql table how can I make Button in html calls function in nodejs to delete row ...

P粉760675452 2024-04-01 13:24:27 0  1  464

MYSQL Workbench - Index after deletion (Java)

I have a problem with MYSQLWorkbench. Let's say I have this table, user "x" has index 8. Let's say I delete this user so now I only have 7 users. If I create a new user using the Java console, the new user is created with ID9 because it is auto-incremented. Is there a way to tell Workbench...

P粉729518806 2023-09-05 10:34:42 0  1  557

How to add delete button in PHP form to delete a row from MySQL table

I have output the results of a MySQL table into an HTML table. In the last column I want to add a delete option that calls another form and deletes the user from the MySQL table. But I can't seem to get it to work. This is the code for my results page: <?php$contacts=mysql_query("SELECT*...

P粉174151913 2023-08-22 12:47:47 0  2  517

Does field order matter in multi-column index in MySQL?

I know the importance of indexes and how join order changes performance. I've read a lot related to multi-column indexes but didn't find an answer to my question. I'm curious if the order in which they are specified matters if I do a multi-column index. My guess is no, and the engine will treat them...

P粉002023326 2023-10-21 22:05:44 0  2  683

Remove leading and trailing quotes from user-submitted strings in VueJS

I have a VueJS application that contains forms that are prefilled with data. The textarea element contains some data as shown on the UI Note: (sorry I don't have enough rep points to attach a screenshot yet): Screenshot of the UI textarea element with quotes I cannot modify the way the backend provi...

P粉076987386 2024-03-26 22:25:27 0  1  444

mongodb 无法通过设置 dropDups : true 建立唯一索引？

数据库中的一个字段已经存在相同的值，想给这个字段建立一个唯一索引，并删除多余的数据，于是建立索引时设置了dropDups 为true，但还是报错重复key，是怎么回事呀？或者有什么方法能快速删除多余的数据呢？

迷茫 2017-04-28 09:03:35 0  5  800

MySQL constrains unique index only if another column is empty

I'm trying to rewrite the Postgres schema to fit the MySQL (8.0.32) dialect. As you know, MySQL does not support partial indexes. In the following case, there will be an index that enforces unique data on customer_group.name only if deleted_at is null. This makes sense since there is no point in ens...

P粉930448030 2024-01-16 15:42:42 0  2  499

Use useState hook to maintain persistent values ​​across multiple function calls

I'm calling the "deleteDepartment" function on a button to delete department rows in a table. Get the selected row index from the table (I'm using shancn table using tanstack table) in "selectedRows" hook (pass setSelectedRows as prop to the table component which gets the value f...

P粉006540600 2023-08-14 13:33:49 0  1  495

How to avoid adding class="" to the last element of a Vue.js loop

In vuejs template, when looping the last iteration of index, remove tailwind class. In the template v-for="(service,index)ingetAllServices.home_page_services":key="index"In the script<script>exportdefault{mounted(){this.$store.dispatch("g

P粉868586032 2023-08-29 14:28:06 0  1  520

ubuntu16.04 - ubuntu 16.04 apache2 installed successfully, but dosen't work!!!

Because I didn’t know that Ubuntu 16.04 has installed apache and mysql by default, and I was handicapped, I deleted all the apache* files in the system. The specific deletion steps are as follows: {Code...} After the deletion is completed, reinstall: { Code...} However, the problem comes, accessing ...

天蓬老师 2017-05-16 16:56:59 0  2  635

java - Lucene wants to delete field as specified value data

{code...} I want to delete the index data with tid 1. I tried {code...} but the input parameters can only be query or term objects, and it has not been successful. What should be done correctly? ?

欧阳克 2017-07-03 11:43:30 0  1  877

How does mongodb reclaim the space that should be vacated after the document is "shrunk"?

The version used is mongodb-win32-x86_64-3.2.1, and the default WiredTiger storage engine is used. There are about 4 million documents in a collection, occupying 40G space; later, the useless part of each document processing is traversed and updated (the document is not deleted), and the script to p...

漂亮男人 2017-05-02 09:24:24 0  2  616

Delete from multiple tables in one statement

Using MySQL, I'm trying to delete multiple records from multiple tables at once. Initially I thought I could do this: DELETEt1,t2FROMtable1t1JOINtable2t2ONt1.id=t2.table1_idJOINtable3t3ONt1.id=t3.table1_idWHEREt1.idIN(?,?,?,?); However, if there are no existing records in table2, I should change the...

P粉716228245 2023-08-18 10:28:49 0  1  554

mysql trigger

MySQL trigger problem, I want to delete the content of an article and the comments about this article in another table will also be deleted at the same time. How to write this? delimiter //create trigger tr_cno before delete on wenzhnag for each row begin delete from choose where content=old.conte

Y.A 2018-06-21 10:52:22 0  1  1393

Optimize table indexes in MySQL

我有一个表(trackingsearches):CREATETABLE`searches`(`id`int(10)unsignedNOTNULLAUTO_INCREMENT,`deleted`tinyint(1)unsignedNOTNULL,`query`varchar(1024)COLLATEutf8mb4_unicode_ciDEFAULTNULL,`userId`int(10)unsign

P粉841870942 2023-07-25 09:47:08 0  1  610