Tag:cursor

  • Interviewer: how to query tens of millions of data through mybatis and ensure that the memory does not overflow?

    Time:2021-12-11

    Due to the mature application of ORM framework, many small partners are weak in the concept of JDBC. The bottom layer of ORM framework is actually a DB operated through JDBC JDBC (javadatabase connectivity) is a java database connection. To put it bluntly, it is to use the Java language to operate the database Sun […]

  • Considerations for configuring redis under Linux

    Time:2021-12-4

    After downloading and installing, configure the redis.conf file VIM quickly find keywords after opening files        / abc   Find string forward from cursor position     ? abc   Find the string ABC backwards from where the cursor is First, it is about background operation. After changing the daemon parameter to yes, redis […]

  • Shortcut keys and tips commonly used in shell terminal

    Time:2021-12-2

    Common shortcut keys and tips for terminal C stands for Ctrl (command). Some commands need to be executed after entering. In the direction, the front is left and the rear is right. Use Wildcards useTab complete Clear or C ^ l clear screen C ^ D close(When there is no input on the current command […]

  • Mongodb document query operation (III)

    Time:2021-12-2

    We have introduced two articles on query in mongodb. In this article, we will introduce another query conceptcursor。 This is the seventh article in mongodb series. Understanding the previous articles will help you better understand this article: 1.Installing mongodb on Linux 2.Mongodb basic operation 3.Mongodb data type 4.Mongodb document update operation 5.Mongodb document query operation […]

  • Linux_ ***

    Time:2021-12-1

    Time: Thursday, August 24, 2017 Note: some of the contents of this article are taken from the book “complete collection of Linux command line and shell script programming”, and the copyright belongs to the original author. *** Chapter 10: using the editor Contents of this chapter VIM editor Namo editor Emacs editor Kwrite editor Kate […]

  • How to set the input box to non editable state (four methods)

    Time:2021-12-1

    Method 1:readonlyIt is specified that the input field is read-only and can be copied. However, the user can use the tab key to switch to this field, select, receive focus, and select or copy its text. (status: the input box will turn gray) <input type=”text” value=”hello JavaScript” readonly=”readonly”> Method 2:disabledThe disabled input element can be […]

  • VIM editor

    Time:2021-11-27

    Study notes, change from time to time. VIM is an upgraded version of VI, which can display color and detect error content. The syntax detection tool is more powerful than it.VIM is a pure command-line editor. Without mouse and menu, you can edit the file content at a glance. Its editing instructions and input text […]

  • Learning and using MS SQL Server cursor

    Time:2021-11-26

    In fact, the cursor has not been used for such a long time using MS SQL server. Previously, similar functions were implemented by using while loop and temporary table. Just now I wrote it with reference to the online example exercise. Understand the concept and syntax of cursors. In the following code example,First, declare that […]

  • Example of SQL Server inserting data into temporary tables

    Time:2021-11-25

    Copy codeThe code is as follows: INSERT INTO #DirtyOldWIPBOM SELECT TOP (100) PERCENT dbo.WIP_BOM.Model, dbo.WIP_BOM.PartNumber,WIP_BOM.WIP FROM dbo.WIP_BOM left OUTER JOIN dbo.BOM_CHINA ON LTRIM(dbo.WIP_BOM.Model) = LTRIM(dbo.BOM_CHINA.Model) AND LTRIM(dbo.WIP_BOM.PartNumber) = LTRIM(dbo.BOM_CHINA.PartNumber) AND dbo.WIP_BOM.Qty = dbo.BOM_CHINA.Qty AND BOM_CHINA.WIP= WIP_BOM.WIP WHERE (dbo.BOM_CHINA.Model IS NULL) AND EXISTS(SELECT * FROM dbo.BOM_CHINA WHERE WIP = WIP_BOM.WIP AND LTRIM(Model) = LTRIM(WIP_BOM.Model)) So you […]

  • Vue rich text Vue quill editor implements click insertion conditions

    Time:2021-11-20

    Preface: summary of Vue quill editor’s experience. Basic usage Display problem (incorrect echo format) After inserting colored characters, the cursor color changes, and the subsequent font color changes accordingly Click the condition list outside the rich text to automatically insert in the rich text and backfill the subsequent conditions 1. Install and lead in Download […]

  • PDO operation learning in PHP (2) preprocessing statements and transactions

    Time:2021-11-20

    In today’s article, let’s simply learn about the preprocessing statements and the use of transactions in PDO. They are all operations under PDO objects, and they are not complex. Simple applications can be easily implemented. But in most cases, everyone is using the framework, and there are very few opportunities for handwriting. Preprocessing statement function […]

  • PDO operation learning in PHP (IV) query structure set

    Time:2021-11-18

    The last article on PDO ends with the operation of query result set. In database operations, queries often account for a very high proportion. In daily development, most businesses are read more and write less, so mastering query related operations is an important content for us to learn. Like mysqli, PDO supports queries very conveniently […]