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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11357

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Shangxuetang MySQL video tutorial

Course Advanced 17659

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Band of Brothers front-end example display video tutorial

Course Advanced 11374

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

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exec return value problem

Common PHP problem, I can’t figure it out. When I execute exec(), there is an update operation. Why are all the statements executed successfully, but the return value is 0. When I execute the same add operation, the return value is the normal number of record rows. I can’t figure it out. Is there any? Have you ever encountered one? give an explanation

2019-11-20 14:26:10

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

2023-09-05 11:18:47

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: .right-menu{...grid-auto-flow:columndense;...} If I remove the grid-auto-flow attribute, the overflow stops. However, the items are now stacked into multiple rows, which is not what I want. I also tried converting .ri

2023-09-05 15:18:28

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

2023-09-05 15:06:32

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HTML table markup tutorial (36): Background color attribute of table header BGCOLOR_HTML/Xhtml_Web page production

Course Introduction：The <TH> tag is used to set the attributes of a header in the table. See the table below: <th> tag attribute of table header Properties describe ALIGN Align horizontally

2016-05-16 comment 0 2004

What are savepoints in JDBC? explain?

Course Introduction：The Savepoint interface provides you with additional transaction control. Most modern DBMS support savepoints in their environment, such as Oracle's PL/SQL. When you set a savepoint, you define a logical rollback point in the transaction. If an error occurs after a savepoint, you can use the rollback method to undo all changes or only the changes made after the savepoint. The Connection object has two new methods to help you manage savepoints - setSavepoint(StringsavepointName): Define a new savepoint. It also returns a Savepoint object. releaseSavepoint(Savepointsavepoint

2023-09-08 comment 0 1370

HTML table markup tutorial (26): Cell markup_HTML/Xhtml_Web page production

Course Introduction：The attributes of the <TD> tag are used to set the attributes of a certain cell in the table. <TD> tag attribute of table Properties describe ALIGN Horizontal alignment of cell contents

2016-05-16 comment 0 1842

Thorough analysis of HTML special characters_HTML/Xhtml_Web page production

Course Introduction：HTML thorough analysis (14) special characters ■ Commonly used special characters As long as you know HTML tags, you will know the use of special characters. HTML original code Show results describe < < Small

2016-05-16 comment 0 1495

HTML table markup tutorial (19): Row mark_HTML/Xhtml_Web page production

Course Introduction：The attributes of the <TR> tag are used to set the attributes of each row in the table, as shown in the following table: <TR> tag attribute of table Properties describe ALIGN Horizontal alignment of row content

2016-05-16 comment 0 1990

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