alter
更改表字段类型 alter table 表名 modify 字段 改后的字段类型 更改表名 alter table 表名 rename to 表名2 添加表字段 alter table 表名 add 字段 类型 (字段1 类型1,字段2 类型2) 删除表字段 alter table 表名 drop column 字段 更改表字段名 alter tab
更改表字段类型
alter table 表名 modify 字段 改后的字段类型
更改表名
alter table 表名 rename to 表名2
添加表字段
alter table 表名 add 字段 类型
(字段1 类型1,字段2 类型2)
删除表字段
alter table 表名 drop column 字段
更改表字段名
alter table 表名 rename column 字段 to 字段2
添加一个分区
alter table tb_kr_voice_summary_01_day add partition DATA_20110707 values ('20110707');
更改表空间名称
alter tablespace XXX rename to XXXX;

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Many users like to download various wallpapers and videos on WallpaperEngine. Over time, they will find that more and more wallpapers are downloaded, resulting in insufficient hard disk space. At this time, the storage location of WallpaperEngine can be changed to reduce the space occupied. So let’s take a look at how to change the save path for wallpaperengine. Step 1: Click Settings under steam in the upper left corner to open the following interface. Step 2: Click Download to find the "Steam Library Folder" under the content library, and click Open above. Step 3: Click Add Library Folder, select the path you want to change to, and after adding it, right-click on the default column.

The default desktop icon font of win7 is generally white. If we use a white desktop background, the desktop icon text may not be visible. At this time, we can customize the desktop font color through the advanced appearance settings in the personalization settings. The following is Let’s take a look together. Tutorial on changing the font color of win7 desktop icons 1. Right-click a blank space on the desktop and open the "Personalization" settings. 2. Under Theme, we can directly select the desired theme to change the font color of desktop icons. 3. If you are not satisfied with these themes, you can also turn on the "Window Color" as shown in the picture. 4. Click "Advanced Appearance Settings" below 5. Change the "Project" at the icon location to "Desktop" 6. Then you can change various attributes such as font color and size in the red box

Many users want to change the font in Notepad on Windows 11 because the default font is too small or difficult to read for them. Changing fonts is quick and easy, and in this guide, we'll show you how to customize Notepad and change the font to suit your needs. What font does Windows 11 Notepad use by default? As for the default font options, Notepad uses the Consolas font and the default font size is set to 11 pixels. How to change Notepad font size and style in Windows 11? Use the Edit menu in Notepad to click the search button and type notepad. Select Notepad from the list of results. In Notepad, click the Edit menu and select Fonts. You should now see the settings in the left pane

Teach you step by step how to change the background color in Eclipse, specific code examples are required Eclipse is a very popular integrated development environment (IDE) that is often used to write and debug Java projects. By default, the background color of Eclipse is white, but some users may wish to change the background color to suit their preference or to reduce eye strain. This article will teach you step by step how to change the background color in Eclipse and provide specific code examples. Step 1: Open Eclipse First

When the game you want to buy is not available, you can purchase it by changing the region. Do any players know how to change the region settings in the Xbox store? So let’s take a look at the introduction to changing the region settings in the Xbox store! Xbox store region settings: 1. Open windows settings - select time and language. 2. Select the region - the default should be China - select other countries and regions. 3. Select other countries and regions - enter the store - the store prompts you to refresh the content.

Properly setting the startup sequence of win7 can make our computer boot faster, but many friends don’t know how to change the startup sequence. In fact, we can change it in the registry editor. Let’s take a look at it with the editor. A specific method. Tutorial on changing the win7 startup sequence 1. Search for "Run" in the lower left corner. 2. Open the "Run" program. 3. Enter “regedit” and press Enter to confirm. 4. Find the following path "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ServiceGroupOrder" and right-click to modify the icon "list" file. 5. The position shown in the picture is from top to bottom.

The temp folder is our temporary file storage location. The system will save temporary files to this folder. If there are too many temporary files, especially when the temp folder is on the system disk, it is likely to affect the system running speed. We can solve the problem by changing the temp location. Let’s take a look below. Tutorial on changing the location of win7temp 1. First, right-click "Computer" and open "Properties" 2. Click "Advanced System Settings" on the left 3. Click "Environment Variables" below 4. Select "temp" and click "Edit" 5. Then change Just change the "Variable Value" to the path that needs to be changed.

Setting up a wireless network is common, but choosing or changing the network type can be confusing, especially if you don't know the consequences. If you're looking for advice on how to change the network type from public to private or vice versa in Windows 11, read on for some helpful information. What are the different network profiles in Windows 11? Windows 11 comes with a number of network profiles, which are essentially sets of settings that can be used to configure various network connections. This is useful if you have multiple connections at home or office so you don't have to set it all up every time you connect to a new network. Private and public network profiles are two common types in Windows 11, but generally
