cissp topics

SQL Interview Topics Summary1. What does a trigger do?A: A trigger is a special stored procedure that is executed primarily by triggering an event. It can enforce constraints to maintain the integrity and consistency of data, and can track operations within the database without permitting unauthorized updates and changes. Can be associated with a level operation. For example, a trigger on a table contains data operations on another table, and that act

/local/mysql/--datadir=/usr/local/mysql/data/--user=mysql ls/usr/ Local/mysql/data/ln-s/usr/local/mysql/bin/*/bin/service mysqld start echo "Now let ' s begin mysql_secure_installation "If [! -e/usr/bin/expect] then yum install expect-y fi echo ' #!/usr/bin/expect set timeout set password [lindex $argv 0 ] Spawn mysql_secure_installation Expect {"Enter for none" {send "\ r"; exp_continue} "y/n" {send "y\r"; Exp_continue} "Password" {send "$password \ r"; Exp_continue} "cleaning up" {send "\ r"}

system stored procedures provided by the DBMS-System Functions: Provides specific expression arithmetic functions, such as date-time functions, String functions, mathematical functions, aggregate functions, etc., which are required for T-SQL programming.-System Views: Contains database metadata, internal system running data, etc., such as catalog view (used instead of system tables in SQL Server 2000), Information Schema View, dynamic management view, and so on.-System procedures: To view syste

Recently started to study Oracle database, the company's system is either Oracle or MySQL.As an IT worker, it's an incredible thing not to touch Oracle. It's too low to think about the past few years, or even the start of the IT industry, when you've only played SQL Server.So it's better to learn from now on. Oracle database is not only the development of Plsql, but also the tuning and configuration of Oracle.Two files downloaded from Oracle Web: Database and ClientDatabase address: http://www.o

Label:Oracle 051 for several topics (Oracle 11g) 1. Usage of interval SELECT INTERVAL ' month,interval ' 54-2 ' year to Month,interval ' 11:12:10.1234567 ' HOUR-SECOND from dual; The query results are: INTERVAL ' ' MONTH---------------------------------------------------------------------------INTERVAL ' 54-2 ' yeartomonth---------------------------------------------------------------------------INTERVAL '

Label:I. A database comprising four tables: Student table (Student), course Schedule (Course), score table (score) and teacher Information sheet (Teacher). The structure of the four tables, as shown in table 1-1 (i) to table (iv), is shown in table 1-2 table (i) ~ table (iv). Create four tables with SQL statements and complete related topics. Table 1-1 table Structure of the database s Table (i) Student (student table) Property name

representation of polymorphism between a parent class and a subclass, and overloading overloading is a representation of polymorphism in a class. If you define a method in a subclass that has the same name and arguments as its parent class, we say that the method is overridden (overriding). When an object of a subclass uses this method, the definition in the subclass is called, and for it the definition in the parent class is "masked". If more than one method with the same name is defined in a

manufacturer puts the buffer memory into the device to reduce access latency and adapt to the performance of the host controller. In this way, the host controller can perform overlapping operations on multiple devices at the same time, and the figure shows this overlap process. On the other hand, caching uses more complex intelligent technologies to determine what data it will store. Buffer is composed of relatively simple memory chips which are constantly detached and filled, but the disk ca

This article original from Http://blog.csdn.net/voipmaker reprint annotated source.The WebRTC-Peer part uses the ice framework, the ICE framework includes the Stun,turn, and one problem with the actual use of WebRTC to develop audio and video applications is that calls are built very slowly because the ice process takes too much time for the client to communicate with the stun server before initiating the call The server reflexive address and the relay address, together with the local host addre

simplify the work of millions of Java programmers by adding scripting languages to Java. Java programmers don't have to write a whole bunch of test cases or drivers for a class they just wrote.Jython provides most of the functionality of Python, as well as the ability to instantiate Java classes and interact with Java classes。 The Jython code is dynamically compiled into Java bytecode, so you can extend the Java class with Jython. You can also use Java to extend Python. It is easy to write a c

compilation, that is, constant values are replaced with initialized values; readonly-Modified constants are deferred until run timeIn addition, const constants can be declared either in a class or within a function body, but static ReadOnly constants can only be declared in a class.In 4.c#, the difference between a value type and a reference typeAll value types in C # are implicitly derived from System.ValueType:Value types: Sbyte,byte,short,int,long,datetime,ushort,unit,ulong,char,float,double

Myth free download and special topics Information Source: delphiscn blog Movie name: the myth)Video type: action moviesStarring: Jackie Chan, Liang Jiahui, Jin Xishan (Korea), Marica (India), SUN Zhou, Shao BingMajor actors: Yu rongguang, Shi Xiaolong, and Xu Jinjiang [Film Introduction] Love, greed, betrayal, and struggle have never changed the history of mankind for thousands of years. At the invitation of William (Liang Jiahui ornaments), Jack (Ja

Let's talk about some interesting topics about object-oriented theory. The story of squares and rectangles Square is a special.----He In the discussion of object-oriented theory, there is a very confusing question: why cannot a square be derived from a rectangle? Because from the definition of geometric mathematics, a square is a rectangle, a special rectangle.First, let's look at the encapsulation of the rectangle. There are many kinds of rectangular

Silverlight shares a set of enterprise development topicsSilverlight default theme for a long time, but also visual fatigue, so the internet to find the next Silverlight theme. There are not many themes found in SL, the following jetpack theme is SL4 era release, but SL5 can also use. For enterprise development also good, who has better, also told me:) Download and install: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=e9da0eb8-f31b-4490-85b8-92c2f807df9edisplaylang=enThis bag ac

is a cache avalanche? How to avoid?Cache penetrationThe general cache system is to follow the key to cache the query, if there is no corresponding value, it should go to the backend system lookup (such as DB). Some malicious requests will deliberately query the nonexistent key, the volume of the request is very large, it will cause great pressure on the back-end system. This is called cache penetration.How to avoid it?1: The case of NULL query results is also cached, the cache time is set a lit

time to--dfs the two graphs and the edges of trees and atavistic.Since there may be multiple connected blocks, the starting point is enumerated in turn, and if u is not visited, then the connected block is traversed from u and the U is dyed first.If you are currently at node U, traverse the son V of U through the adjacency table, and note that when you enumerate V, you are going to leave the father of V to U. If it is found that V has not been traversed, then the V is dyed and then continues to

If no special instructions, the default is the large field of view problem"Two-point answer"2196: [Usaco2011 Mar]brownie slicing1082: [SCOI2005] Fence3969: [Wf2013]low Power1650: [Usaco2006 dec]river Hopscotch jumping stones1639: [Usaco2007 mar]monthly Expense monthly expenditure2600: [Ioi2011]ricehub"Backpack class DP"1625: [Usaco2007 Dec] gemstone Bracelet1531: [Poi2005]bank Notes1606: [Usaco2008 dec]hay for Sale buy Hay2748: [HAOI2012] volume adjustment4247: Hanging Ornaments1334: [Baltic2008

Dojo technical topics Page navigation Entry to Dojo Dojo Web 2.0 Dojo skills Understanding the Dojo toolkit series Localization and Internationalization Accessible Development Dojo Testing With the rise of rich Internet applications (RIA), the functions of various JavaScript development kits are also constantly enhanced, and Dojo is one of the best. Dojo provides a complete set of development solutions, including the core JavaScrip

, MyBaseClass is the base class for Myderivedclass, and DoSomething () The version is included in the Myderivedclass. because base uses an object instance, using it in a static member produces an error .This keywordIn addition to using the Base keyword in chapter 9th, you can also use the This keyword. Like base, this can also be used inside a class member, and the keyword also references an object instance. Just this refers to the current object instance (that is, you cannot use the This keywo

1. Title: Randomly generate 30 to arithmetic questions, which cannot exceed 2-bit operations, including true fractions.2. Design Ideas(1) The first four numbers are randomly generated, the first two numbers are used as the arithmetic of integers, and then the first two numbers are then used as the second score, and the next two numbers as the number two.(2) Each case is represented by the Switch\case function, and the remainder by dividing by 7 represents a different case in 8, the first four re