描述
select * from all_tab_comments select * from user_tab_comments select * from all_col_comments
select * from all_tab_comments
select * from user_tab_comments
select * from all_col_comments
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Solve the problem that CentOS7's Tab key cannot complete commands
Jan 17, 2024 pm 01:30 PM
Today I was doing an experiment on centOS and found that the customary tab key completion method used under Ubuntu could not be used. So I was very curious. After searching for information and testing it myself, I recorded the possible solutions as follows: 1) First, you need to Run the following command in the terminal: #yuminstallbash-completion//You can also use wildcard installation: yuminstallbash-c* or you can install some initialization package groups yum-ygroupinstallBaseCompatibilitylibrariesDebuggingToolsDial-upNetworkingsupppo
How to implement tab components and multi-tab pages in Vue?
Jun 25, 2023 am 09:33 AM
With the continuous updating of front-end technology, Vue, as a popular front-end framework, has become the first choice of many developers. In actual projects, it is often necessary to use tab components and multi-tab pages to switch and manage different functional modules. In this article, we will introduce how to use Vue to implement a simple tab component and multi-tab page. 1. Implement a simple tab component. Create a Tab.vue component. Create a Tab.vue component in the project to display it.
Asynchronous processing method of Select Channels Go concurrent programming using golang
Sep 28, 2023 pm 05:27 PM
Asynchronous processing method of SelectChannelsGo concurrent programming using golang Introduction: Concurrent programming is an important area in modern software development, which can effectively improve the performance and responsiveness of applications. In the Go language, concurrent programming can be implemented simply and efficiently using Channels and Select statements. This article will introduce how to use golang for asynchronous processing methods of SelectChannelsGo concurrent programming, and provide specific
How to hide the select element in jquery
Aug 15, 2023 pm 01:56 PM
How to hide the select element in jquery: 1. hide() method, introduce the jQuery library into the HTML page, you can use different selectors to hide the select element, the ID selector replaces the selectId with the ID of the select element you actually use; 2. css() method, use the ID selector to select the select element that needs to be hidden, use the css() method to set the display attribute to none, and replace selectId with the ID of the select element.
What are the three ways to implement tab in Vue?
Jan 29, 2023 pm 02:49 PM
There are three ways to implement tabs in Vue: 1. Control tab content switching through "v-show"; 2. Implement tab switching through the is feature and "keep-alive" cache in Vue; 3. Implement route switching through "router-link" .
What is the concept of mysql comment
Jun 02, 2023 pm 05:34 PM
Comment means remarks and annotations. In the MySQL database, comments on fields or columns are added using the comment attribute; in scripts that create new tables, comments can be added by adding the comment attribute in the field definition script. If you want to view the comments of all fields of an existing table, you can use the "showfullcolumnsfrom table name" command. In mysql, COMMENT means remarks and comments. MySQL adds comments (comment) In the MySQL database, comments on fields or columns are added using the comment attribute. In the script that creates a new table, you can add comments by adding the comment attribute in the field definition script. The sample code is as follows: c
How to implement change event binding of select elements in jQuery
Feb 23, 2024 pm 01:12 PM
jQuery is a popular JavaScript library that can be used to simplify DOM manipulation, event handling, animation effects, etc. In web development, we often encounter situations where we need to change event binding on select elements. This article will introduce how to use jQuery to bind select element change events, and provide specific code examples. First, we need to create a dropdown menu with options using labels:
What is the reason why Linux uses select?
May 19, 2023 pm 03:07 PM
Because select allows developers to wait for multiple file buffers at the same time, it can reduce IO waiting time and improve the IO efficiency of the process. The select() function is an IO multiplexing function that allows the program to monitor multiple file descriptors and wait for one or more of the monitored file descriptors to become "ready"; the so-called "ready" state is Refers to: the file descriptor is no longer blocked and can be used for certain types of IO operations, including readable, writable, and exceptions. select is a computer function located in the header file #include. This function is used to monitor file descriptor changes—reading, writing, or exceptions. 1. Introduction to the select function. The select function is an IO multiplexing function.
