testcomplete keys

primary key foreign keys and indexes(This article is transferred from http://www.cnblogs.com/longyi1234/archive/2010/03/24/1693738.html) First, what is primary key, foreign key: a record in a relational database has several attributes, if one of the attribute groups (note is a group) can uniquely identify a record, the attribute group can be a primary keyLike whatStudent form (school number, name, gender, Class)Each student's number is unique, and t

timetable.The primary key and foreign keys are defined primarily to maintain the integrity of the relational database, summarizing:1. A primary key is a unique identifier that determines a record, for example, a record includes identity plus, name, and age. The ID number is the only one who can be sure of you, and others may have duplicates, so the ID number is the primary key.2. A foreign key is used to associate with another table. is a field that

Common eclipse Java shortcut keys (eclipse shortcut cut keys for Java Top10)0. BackgroundEclipse, as the Java opensource development IDE, is already the first choice for developers to develop Java applications (not limited to). Although there are many other optional ides, however, other tools are either paid tools, such as intellij, IBM Rational Application Developer (eclipse + IBM plugins), and JBuilder; o

Phpstorm shortcut keys Daquan phpstorm common shortcut keys and configuration source: cc finishing. Date: 2015/8/11 21:50:38 [Big Small] Comments: 0 | I want to express my opinionPhpstorm is a commercial PHP integrated development tool developed by JetBrains, and Phpstorm is ready to help users adjust their coding, run unit tests or provide visual debug functionality. Phpstrom, a plug-in named Magicento, is

Eclipse shortcut keys and eclipse shortcut keysEclipse has powerful editing functions, master the Eclipse shortcut key function, and greatly improve development efficiency. Eclipse has the following shortcut keys related to editing. 1. [ALT +/] This shortcut is a good helper for users to edit and can help users with content. Do not worry about incomplete methods and attribute names, when you do not remember

Phpstorm is a commercial PHP integrated development tool developed by JetBrains, and Phpstorm is ready to help users adjust their coding, run unit tests or provide visual debug functionality. Phpstrom, a plug-in named Magicento, is useful for quickly creating Magento plugins.Common shortcut keysSet shortcut keys: Select "Eclipse" and then "copy" one copy and re-personalize (your own) shortcut keys, Settings

This article describes how to use the keys () method to return dictionary keys in Python. it is a basic knowledge in Python. For more information, see keys () method returns a list of all available keys in the dictionary. Syntax The syntax of the keys () method is as f

The Eclipse shortcut key function, or the menu, is not available. For example: The search reference (shortcut key ctrl+shift+g) is invalid;Solution: Convert workspac?e, or delete the workspace directory?. Metadata folder, restart Eclipse, reset.Eclipse's editing capabilities are powerful, and mastering the Eclipse shortcut key capabilities can greatly improve development efficiency. There are several shortcut keys related to editing in Eclipse.1. "Alt

Eclipse common shortcut keys and eclipse shortcut keys 1. Several most important shortcut keys Code ASSISTANT: Ctrl + Space (Alt +/in simplified Chinese /)Quick Fix: Ctrl + 1Word completion: Alt +/Open the external Java document: Shift + F2 Display Search dialog box: Ctrl + HQuick Outline: Ctrl + OOpen Resource: Ctrl + Shift + ROpen Type: Ctrl + Shift + TDisplay

One, multi-line Comment shortcut keys1. Select the area you want to annotate, use ctrl+shift+c or ctrl+/ to add//comment2. Select the item you want to annotate, and use shit+ctrl+/ to add */*/comment3. The above shortcut will be removed by repeating the comment4. To modify the shortcut key for a command in Eclispe we just have to go to the key settings, Windows-preferenceSecond, add the document comment shortcut key in eclipse1. For example, the default document comment:/*** @author XX**/2. Shor

　　Set shortcut keys:Settings, IDE Settings, File------select "Eclipse" and then "copy" a copy--Re-personalize (your own custom) shortcut keys frequently used shortcuts (keymaps :D Efault case)　　Common shortcut keysESC key Editor (from tool window)F1 help don't press, very card!F2 (SHIFT+F2)/high-gloss error or warning quick locationF3 down find where the keyword appearsF4 finding the source of a variableF5 Copying files/foldersF6 MobileF11 Toggle Book

How do you choose what you usually choose between the foreign key and the table link? Between Foreign key and table Link Reply content: How do you chooseBetween Foreign key and table Link Let's see the scenario. For example, if you have a table to store product data and another table to store the product type, there is no foreign key at this time.If you have a table that stores order data, another table that stores customer information, a table that stores product information, and a tab

Original: UWP Determines whether Windows Mobile uses entity keys or virtual keysRecently in the Write startup screen, found that the virtual button will block, start the bottom of the screen element, about a few px. But is there any way to know whether the mobile phone is a physical key or a virtual key?Such as. You can see that the red part shows a little bit. The code is set to 60px.Searched the internet for a long time. Have not found any API to vi

How do you choose the usual Between the outer key and the table link Reply content: How do you choose the usualBetween the outer key and the table link Look at the situation, for example, you have a table to store product data, another table for the product type, this time with foreign keys and nothingIf you have a table that holds order data, another table that stores customer information, a table that stores product information, and a table

Oracle constraints on database integrity: Three methods to maintain data integrity: ORACLE integrity constraints, database triggers, and application code. ORACLE integrity constraints should be used whenever possible, with high reliability and efficiency, easy to modify, flexible to use, and recorded in the data dictionary.Five ORACLE constraints: Non-null not null. The defined Column cannot be empty. Can be defined only at the column level Unique, unique. The column or column value defined by e

Eclipse common shortcut keys and eclipse shortcut keys Eclipse's most complete shortcut keys. Familiarity with shortcuts can help developers get twice the result with half the effort and save more time for meaningful things. Ctrl + 1 quick fix (the most classic shortcut, you don't need to talk about it) Ctrl + D: Delete the current row Ctrl + Alt + ↓ copy the cu

Set Shortcut key method The code is as follows Copy Code Window->preferences->general->keys You can set the Or The code is as follows Copy Code "Window" → "Preferences" →general→keys→ Find content Assist enter the shortcut key you want to set in binding Set shortcut keys Invalid workar

Set shortcut keys for the form and shortcut keys for the form 1 private void WWnd_KeyDown (object sender, KeyEventArgs e) 2 {3 if (e. control e. keyCode = Keys. f8) 4 {5 WWnd wnd = new WWnd (); 6 wnd. showDialog (); 7} 8} The shortcut key is Ctrl + F8. Private void WWnd_KeyDown (object sender, KeyEventArgs e) {if (e. alt e. shift e. control e. keyCode

Mysql adds multiple foreign keys to the table and adds foreign key cascade constraints to Mysql foreign keys BitsCN.com Mysql adds multiple foreign keys/adds foreign keys/cascading constraints to the table 1. create table 'xh' ('id' int (100) unsigned not null AUTO_INCREMENT COMMENT, 'cl _ id' smallint (3) unsigned