after I install the pdo_mysql extension, I link with tp and report an error from time to time : ( Undefined class constant MYSQL_ATTR_INIT_COMMAND wrong location but after a while it returned to normal, and after a while it was out of touch, and...
now there are two servers. One server runs on a web page, and the database is located on another server. Now the requirement is to operate on the web page and need to modify the database content on the two servers. So how to modify the data in the databa...
ubuntu mysql5.7 startup prompt error mysql start ERROR 2002 (HY000): Can t connect to local MySQL server through socket var run mysqld mysqld.sock (2) use journalctl-xe journalctl -xe 12 10 11:49:38 user-70DGA014CN kernel: ata3.00: configured...
problem description because the company has the demand for answering questions and handing out red envelopes, the activities are equivalent to giving red envelopes, and there is no concept of grabbing red envelopes. That is, there is a daily limit of,...
alter table TB_EXAM_PROBLEM modify PRO_DESC VARCHAR2(4000);alter table TB_EXAM_PROBLEM modify PRO_KEY VARCHAR2(4000); can only be modified one by one? ...
I remember that spring transaction management defaults to false, but there seems to be a conflict between many database pools, including druid, autocommit, which defaults to true,. In addition, autocommit, can also be configured in the configuration of ...
I have written an interface that simply inserts data into the database. When passing the stress test of apache s ab.exe tool, if the concurrency is more than 200, there will be write failures. I can t find the error message in the Nginx error log. Ho...
now use phpmailer to make a program that automatically sends mail when it comes to time. There is a requirement that there will be name duplicates in the database, but the class will not repeat. If you need to detect name duplicates in the output variab...
100 degrees TM is similar to this: declare done int default false; declare mycursor cursor for select * from ; declare continue HANDLER for not found set done = true; -- , not found , done true. but this time it brings a pit,...
there are three existing servers (all mysql5.7 installed by centos7,): br 10.19.6.6 BRV 192.168.3.101 CRAV 192.168.3.102 use xtrabackup to back up A s MYSQL data, then restore to B A s database to deactivate, and B updates the primary database d...
novel website, high-performance database design, using PHP + Mysql + Redis, has seen the forum, someone said that the novel saved txt file or xml format, mysql save txt file address (paging how to do it) , would like to ask the bosses, there are no ide...
for example, I always thought that select * from table where index column = xx and AMISOM column = yy must take the index of index column. but today I found that is not the case . tested (MySQL 5.6.16): when the union condition can match to th...
when using insert on duplicate key update to insert duplicate data, only the data of the duplicate unique index is updated, and the number of affected rows is returned as 2 rows. looking up data means that the operation will perform two operations: 1....
there are only 42 pieces of data in the table, ordinary SQL statements, no index and so on, and the table structure has not changed by default. Why the query speed is so slow. select articleId, CODE, articleTitle, articleImg, articleKeyword, articleAbs...
Qiniuyun space has expired, and the files in the space cannot be downloaded. Solve how to download uploaded files ...
overall environment: Apache2.4.25 + PHP5.6 + MySQL5.5.57 demand: 2 question: 6000Apache Server PHPignore_user_abort(true);set_time_limit(0); practice: question: 6000 ob_flush() flush()2500 cpu ...
PHP developers, will the MySQL datasheet lock up when it empties the data? I don t know much about the database. ...
use xtrabackup s innobackupex tool to back up the mysql database, some of which are myisam engines. After another machine is restored, when querying the table, prompt table "xxx " is marked as crashed and should be repaired, to use the repair command t...
which is faster, please? A: UPDATE vehicle SET driveMileage= CASE vin WHEN LMVXXXXXX1 THEN 3434 WHEN LMVXXXXXX2 THEN 4345 WHEN LMVXXXXXX3 THEN 5334 WHEN LMV999...
start transaction; select * from test where id = 8 for share; update test set name = grayvtouch where id = 8; select * from test where id = 8 for share; at first I thought it was a shared lock , but as a result, I did get stuck by executing the fol...
there is a problem when using nginx to configure the front and back end to separate items. The front end is done with react and the routing is in history mode. The nginx configuration is as follows: server { listen 8000; server_name test; ...
problem description Type the java project into tar.gz format, and then extract it on Linux. File directory: . -conf -bin -startup.sh -lib -logs -README.md I execute . bin startup.sh start the java program. bu...
I don t understand; Why not all pass strings directly ...
interface ModuleA{ width: number; height: number; } interface ModuleB{ width: number; offset: number; } function test(params: ModuleA | ModuleB): any{ console.log(params.offset); } The joint declaration in TypeScript, in this cas...
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