csr 2 keys

Indexes always play an important role in performance. In fact, the query optimizer checks the statistics on the predicates before deciding what indexes to use. By default, statistics are created on all index columns when an index is created. However, it does not mean that statistics on non-index keys are useless for performance. If Indexes always play an important role in performance. In fact, the query optimizer checks the statistics on the predicate

: automatically insert in code by user input: Getter, Setter, construction method, replication method, interface method, equal, Hashcode, parent class call, copyright information, etc.default configuration keys: Windows is alt insert, MAC default not set recommended setting to cmd=2. Code/reformat Code formatting (Ctrl alt L)function: formats the currently selected code, code file, or globaldefault configur

Redis's official website Http://redis.io is an important resource for Redis, and all the commands are listed here http://redis.io/commands.1. Database Selection command:SELECT index //select which database to use for the current connectionDefault configuration The next Redis-server service opens 16 databases with the index bit 0~15, which can be selected using the Select command, and the REDIS-CLI connection uses the library No. 0 by default.Note: Redis commands work on the selected library. Fo

here, without further analysis.anyway, as long as there is a button pressed, will execute simplebletest_processevent this function, in fact, the press release when also have a button message sent up, convenient for us to make a judgment on the key state. and simplebletest_processevent This function is in our application layer. At this point, the key process analysis is complete.Application LayerApplication layer similar to Key1, registration + event handling (see above)not finished ~ Follow my

Android app. Samsung i9000 series tutorial (2). Engineering Code, network lock and Lock three keys Papaya 20110401 I. Engineering Code The project code provided by i9000 is very useful, as follows.(The content is organized on the network. The original author is unknown) Dial Input * #0 * # mobile phone test (recommended purchase test)Line 1 red green blue (primary color test)Line

Sketch Default shortcut keys Insert Insert shortcut Keys Rectangle Rectangular R Rounded Rectangle Rounded Rectangle U Oval Elliptic O Vector Point Vector points V Text Text T Canvas view canvas view zoom in view magnification

Displays the Exceptions dialog box.Debug. Local variable CTRL + ALT + L Displays the local variables window to see the variables and their values for each procedure in the current stack frame.Debug. Process CTRL + SHIFT + R Displays the Processes dialog box, which allows you to debug multiple programs at the same time in a single solution.Debug. Restart CTRL + SHIFT + F5 to terminate the debug session, rebuild, and then start running the application from the beginning. Available for break mode

Recently, the company organized project team members to develop an Android project demo, no one has andoid development experience, are developing C #. Although the project requirements are not very high, but for those who do not have this experience, the first step is the most difficult.The project lasted one months, 4 people developed, the final line into a usable demo, the overall effect is very good. This one of the online "Imitation NetEase client Demo" There is also learning "Crazy Android"

closes the window when no label is in the windowCtrl + Shift + T restores the label just closed7 , ScreenF11 switch to normal fullscreenSHIFT + F11 switch to full screen without interferencealt+shift+1 Single switch to one-screenalt+shift+2 Columns:2 switch to vertical two-column split screenalt+shift+3 Columns:3 Switch to vertical three-column split screenalt+shift+4 Columns:4 Switch to vertical four-bar

Label:Original: 12th Chapter--sqlserver Statistics (2)--Influence of statistics on non-indexed keysObjective:Indexes always play an important role in performance, and in fact, the query optimizer first checks the statistics on the predicate before deciding on what index to use. In general, statistics are created on index columns when the index is created by default. However, statistics that do not represent on non-indexed

The ' t ' key. Tab The ' tab ' key. U The ' U ' key. Up The ' Up ' key. V The ' V ' key. Volumedown The ' Volumedown ' key. Volumemute The ' Volumemute ' key. Volumeup The ' Volumeup ' key. W The ' W ' key. X The ' X ' key. Y The ' Y ' key. Z The ' Z ' key. Zoom The

: p.box$$*5;X. Class name Self-increment 3 (reverse): "@-"1, writing Format: element. The number of class name @-*;2, example: [Email protected]*5;Xi. class name self-increment 4 (Set start value): "[Email protected]"1. Writing format: Elements. class name [email protected] Start value * number;2, example: [Email protected]*5;12, class name, ID name combination shortcut1. Writing format: element. class name

2 Keys Keyboard "programming question", keyskeyboardDescription Solutions I don't have to mention the question. As for the solution, I want to think about the dynamic planning of the past, but I think about it and it will be biased by a cute ting. But in the end, I still have a different path, this question is solved by studying the numbers themselves. The general idea is as follows:For n characters A, if y

same action method)72, the background layer to add masks: the background layer into the normal layer (double-click the background layer, hit enter OK)73. Add a mask with a selection:Within selection: White (show) outside selection: Black (hidden)74. Selected Layer Add Group: ctrl+g (each group can add masks)75. Layer Style properties:Distance: The distance between the control effect and the original objectExtend: Control the actual and false extent of effect edgesSize: Control effect Size76, Be

System shortcut key conflict, need to modify ) CTRL + Z Revoke Ctrl+y Restore Undo Ctrl+shift+v Paste and Auto Indent (the other brother wrote, the test win system automatically indentation invalid ) Ctrl+m Cursor jumps to the corresponding parentheses ALT +. Close the current label Ctrl+shift+a Select the cursor position parent tag pair child ctrl+shift+[ Coll

undoCtrl+shift+v Paste and Auto indent (other brothers write, measured win system automatically indentation invalid)Ctrl+m cursor jumps to the corresponding parenthesesALT +. Close the current labelCtrl+shift+a Select the cursor position parent tag pair childCtrl+shift+[Folding CodeCtrl+shift+] Unwind codeCtrl+kt Collapsing propertiesCtrl+k0 Expand AllCtrl+u Soft UndoCtrl+t Word ExchangeTab IndentShift+tab removing indentsCtrl+shift+up and Upstream InterchangeCtrl+shift+down and Downlink Interc

How to use Macvim1. Outside the Insert mode Basically, you should stay in the insertion mode as little as possible, because VIM is like a "dumb" editor in insert mode. Many novices will always stay in the insert mode because it is easy to use. But the power of VIM is in his command-line mode! You'll find that after you get to know VIM more and more, you'll spend less time using insert mode. 2. Using H, J, K, L The first step in using VIM for efficient