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MySqlConnector: MySqlBulkLoader class. Upload empty data from csv to MySQL table

From MySqlConnector.MySQLBulkLoader class I want to convert csv to MySQL table keeping null values.

P粉398117857 2024-04-06 14:35:18 0  1  1016

Solve the problem of operation error when pythonanywhere connects to MySQL database

I have finished my django project and I want to test it on PythonAnywhere, everything was fine until the mysql database connection showed an error to which I have paid subscription. An operation error occurred on /home/ (1044, "Access to database 'almx98' for user 'almx98'@'%' is denied") ...

P粉459440991 2024-03-31 22:43:19 0  1  686

When inserting data encapsulated by the PHP class, the insertion is always unsuccessful and false is returned;

<?php //Database operation class class Model{ Private $host; //Database address Private $user; //Database username Private $pwd; /

A _ Ｑ _ｉ_ 2021-10-13 10:21:27 0  6  1131

syntax - C++11 thread calls member function of object

If you drop a member function of a class, it's probably like this. {Code...} But what if you want a specific object of this class to perform this operation?

迷茫 2017-05-16 13:22:21 0  2  1173

The test database operation class db statically calls the getInstance method.

In the entry file idnex.php, new base.php calls the run method. How to complete the connection to the database in base.php. I don't see an instance of the db class in the code. Can any kind person explain this to me? Thanks!

航航 2022-08-18 17:23:59 0  1  934

Return value of transaction commit?

Db::commit() can use if (Db::commit()) {Operation only if MySQL operation is successful}

不屑一顧 2018-05-10 17:44:41 0  0  831

MySQL operation guide using UNION and LIMIT

So, I have this problem at hand. I have to get multiple records from different tables using inner join and using UNION or UNIONALL for pagination, below code is used to get all records and count. This is my nemesis: (SELECTpp.idasid,pp.*,i.name,p.nameasplans_name,u.username,u.email,u.phone,DATE_ADD(...

P粉680487967 2023-09-08 12:39:10 0  1  616

MySQL operation to get maximum sum function

I'm trying to set the maximum quantity to "max" and I'm getting the error: Error code: 1111. Invalid use of group function 0.000 seconds SELECTmax(count(*))asmaxFROMticketgroupbyfan_fan_id; I'm not sure what the problem is here and I'd be happy to get some help here - and I need to solve i...

P粉139351297 2024-04-04 17:49:26 0  1  674

mysql - Problems with coherent operation in ThinkPHP3.2.3?

代碼 SQL語句為SELECT crsIpint,crsIpout,crsName,wfdz,CheckStatus,0 AS flag FROM vehicle.crossing AS t1 LEFT JOIN ( SELECT * FROM caminfo.devs_ip_status WHERE type = 95 ) AS t2 ON( t1.crsId = t2.Devi...

過去多啦不再A夢 2017-07-05 10:46:05 0  3  1032

Can PHP directly call functions in a class without using new?

I have to do something new every time, which is very unaccustomed. Can I use the functions in the class directly? The purpose of using the class is to look at the static attributes inside, so that when operating redis or mysql, automatic connection and connection reuse can be realized without the ne...

只爭朝夕 2022-12-23 12:12:24 0  1  2058

javascript - jquery selects one of the buttons of the same class to perform an operation.

{Code...} ".parButton" There are multiple Buttons. This will allow the currently clicked one to be selected. Why when I execute this line of code, the first ".parButton" Button is always executed multiple times.

漂亮男人 2017-06-30 09:57:35 0  1  981

Can't use constants with empty()?

parent::_initialize();// Inherit the initialization operation in the parent class. It is different from what the teacher said. In addition, if(empty(USER_ID)) reports an error, if(USER_ID!=null) can.

劉磊 2018-11-01 16:04:04 0  2  1525

javascript - Does Firefox not support bootstrap tooltip? It's good in Google

&lt;button type="button" class="btn btn-link General-fontsize custom-btn operation-icon-margin" ng-disabled="!vm.startEnabled" ng-click="vm.openDialog('start')&q

某草草 2017-05-19 10:10:03 0  1  827

javascript - Can I use setAttribute/removeAttribute to add or delete class names?

In a group discussion about the operation of class names in native js, someone suggested that the setAttribute and removeAttribute methods can be used to operate class names. I felt very puzzled: I thought there were only classList.add() or classList.remove(). Methods can solve this need, but someon...

過去多啦不再A夢 2017-05-19 10:46:49 0  3  1135

After adding parent::initialize();, an error is reported

protected function _initialize(){ parent::initialize();//Inherit the initialization operation in the parent class define('USER_ID', Session::get('user_id')); } In the Base controller, parent is added: :initialize(); This sentence reports an error. Why is this?

phpcn_u43886 2017-10-24 11:23:23 0  4  1577

Page error, please try again later

Teacher, I followed your operation step by step. When I encapsulated the database access class, the web page prompted: Page error. Please try again later! I assign simple numbers to $res and it can be displayed normally.

奮斗 2018-12-04 22:49:33 0  2  1535

MySQL - Trigger to update the same table after insert operation

Here's what I'm trying to do: When there is a new INSERT into table ACCOUNTS, I need to update the row in ACCOUNTS by setting status='E'phpcnend with pk=NEW.edit_oncphpcn to mean the specific (old) Account has been edited. DELIMITER$$DROPTRIGGERIFEXISTS`setEditStatus`$$CREATETRIGGER`setEditStatus`AF...

P粉419164700 2023-10-16 20:01:46 0  2  848

php - mysql update operation is slow, how to solve it

The database has an items table. Now we need to update the userid field in it. The statement is UPDATE items SET userid = xxx WHERE userid = 0 limit 1; We have started transactions to optimize the time, but it still feels too slow. It costs 3 to update 30,000 items. minute. Try to create a temp tabl...

僅有的幸福 2017-05-16 13:07:09 0  2  651

java - Convert list<bean> to a list of another bean.

{Code...} I need an operation similar to the following. {Code...} reports an error of an unconvertible type. DataBean is an internal static class. There is reinterpret_cast in C++ that can force conversion, and Java should have a corresponding method.

PHP中文網(wǎng) 2017-05-17 10:07:31 0  4  1189

javascript - How to optimize jquery loop append operation?

There is a page display function in the project. It is necessary to add canvas tags to the tags to which the specified class belongs. Because there is a query function, a corresponding number of canvas tags must be added according to the amount of data queried. I am now using a loop operation. First...

滿天的星座 2017-06-28 09:27:19 0  1  764