multi-word read primary key. It is called the main code. And it can uniquely determine a row of data in a table, or you can uniquely identify an entity. 29. Create a UNIQUE Constraint data table (parameter self-growth) Mysql>create Table Tb3 ( ->id INT UNSIGNED PRIMARY KEY auto_increment, //increment self-growth ->name CHAR (a) is not NULL UNIQUE, //unique Unique Constraint ->weight FLOAT (5,2) DEFAULT 50.3 //default Setting default values ); 30. Invalid null value for UNIQUE constraint 31. Add
Learn about common Mac OS X shortcuts. The shortcut key is used to call Mac OS X by pressing the combination key on the keyboard.
To use shortcuts or key combinations, you can press the modifier key and character key at the same time.
For example, if you press the Command key (the key marked with a symbol) and the "c" Key simultaneously, any selected content (tex
Mac leopard, which is a common shortcut key for Apple computers, mac OS X applicable Action shortcut key stop process Command + period force exit Application Command + Option + Escape force restart Command + Ctrl + power key screen capture action Save As shortcut key the ent
This article refers to the Leopard Chinese guide, combined with the author's practical experience, summed up the most commonly used shortcut keys for readers to referenceHow to improve work efficiency?If you use your Mac, you'll be able to improve your productivity by using shortcut keys. I think that if the quicksilver+spaces+ keyboard
Organize Eclipse common shortcut keys The development environment switch to the Mac under The original Window shortcut key is incompatible, accustomed to the shortcut key life suddenly which day shortcut keys do not work, followed by the development efficiency is significant
Systemuiserver
Replace the blue part with any words you want, such as "screenshot". You need to reboot the system for the prefix modification to take effect.
The time stamp is changed to the English am, PM representation and needs to be set to System preferences. Click Language and text, and select the Format tab. In the middle of the time section, click the Custom ... button. Change the word "AM" and "PM" to the right of "before noon" and "after noon" in the lower left corner.
How to get ri
Organize Eclipse common shortcut keys The development environment switch to the Mac under The original Window shortcut key is incompatible, accustomed to the shortcut key life suddenly which day shortcut keys do not work, followed by the development efficiency is significant
Modify the shortcut key of the Black Apple Mac System
Today, we will introduce how to modify the shortcut keys of the Black Apple Mac system:
Because the keyboard of the Apple Computer is different from that of the ordinary PC computer, the shortcut keys of the Apple Comp
I just switched to the MAC system, but it was still a tough c-V C-space. The official website has a complete shortcut key version. Paste down the memo.
Http://support.apple.com/kb/HT1343? Viewlocale = zh_cn
To use shortcuts or key combinations, you can press the modifier key and character key at the same time. For example, if you press the command key (the key marked with a symbol) and the "c" Key simulta
Collect some shortcuts that are commonly used by Xcode and Mac, where plus * * is very common and requires a firm graspxcode common shortcut keys**command + N: Create a new file (Mac generic)**command + Shift + N: Create a new folder (Mac generic, create a new project in Xcode)**command + B: Compile code**command + Shi
Mac system shortcut key list system start system startPress X at startup: Force the computer to start using MAC OS xPress Option-command-shift-delete at startup: Do not use the primary boot hard drive and look for the use of external disk with CDPress C at startup: Started by a CD disc with a system folderPress N at startup: Attempt to boot from a compatible netw
Apple's new 12-inch MacBook, released in March this year, has been on the market for a sleek, lightweight look that is of course a lot of users who go from Windows to the Mac camp. Many accustomed to the Windows operating habits of users in the start of the Mac will find it very difficult to use, in fact, as long as the MAC system
Organize Eclipse common shortcut keys The development environment switch to the Mac under The original Window shortcut key is incompatible, accustomed to the shortcut key life suddenly which day shortcut keys do not work, followed by the development efficiency is significant
Mac shows what the desktop shortcut is, how does Apple Mac get back to the desktop quickly? Many friends who work with Apple Mac computers have very high productivity requirements, and if you open a lot of apps while using Apple Mac, but you need to go back to the desktop im
Tags: ctr No options Return original span Luci also has a clickFor several days did not write a blog, in Win10 wrote a few days python, and then under the Pycharm use, found also can, but too cumbersome, cut back to the Mac, then installed the Pycharm community version.But this use is too awkward, no myeclipse ALT + UP ARROW, ctrl+d Quick Delete and other shortcut keys.Search on the internet for half a day,
1. Refresh: Command + R2. Minimize the current window: Command + M3. Hide all windows except the current window: command+option+h4. Hide and minimize all windows at once: Command+option+h+m (www.macx.cn)5. Use a file: Ctrl+space Bring up Spotlight (input "calculator" can call calculator software)A file is selected in 6.Finder and a single space can be opened quickly.7.command+tab Switching applications (forward loop)Shift+command+tab Switching applications (loop backwards)Command+delete Move the
method
CTRL + P
Generate Method
ALT + Insert (Win)
CMD + N (MAC)
Jump to source
F4 (Win)
CMD + down-arrow (MAC)
Delete Line
CTRL + Y (Win)
CMD + Backspace (MAC)
Search by symbol name
CTRL + ALT + SHIFT + N (Win)
OPTION + CMD + O (MAC)
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