proficient m4

Tags: location optimization chapter I val cat ber exec oca IdaFirst chapter CodeEXEC dbms_stats.set_table_stats (ownname=> ' SCOTT ',tabname=> ' EMP ',numrows=>100000,no_invalidate=> FALSE);EXEC dbms_stats.set_index_stats (ownname=> ' SCOTT ',indname=> ' pk_emp ',numrows=>100000,no_invalidate=> FALSE);Select Empno,ename,rowid,dbms_rowid.rowid_relative_fno (rowid) | | _ ' | | Dbms_rowid.rowid_block_number (ROWID) | | ' _ ' | | Dbms_rowid.rowid_row_number (ROWID) location from Scott.emp;

table, it is better to destroy the index first, and then build the index after the data has been updated, which increases efficiency.7> index to occupy database space. When designing a database, take into account the required index space.8> try to keep the table and its index on separate disks, which can improve query speed.6. View6.1, the advantages and disadvantages of the view, mainly in the simplification of operations, custom data, merge separated data, security and so on.There are two mai

Tags: Oracle 11g installation Diagram Oracle database tutorial Oracle installation Oracle Video tutorial Oracle Tutorial1. After completing this chapter, the Oracle Video tutorial will be able to master the following:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/6C/F9/wKiom1VYlzGBc2q8AAGwuGI81FQ479.jpg "title=" 05- High.jpg "alt=" wkiom1vylzgbc2q8aagwugi81fq479.jpg "/> use Oracle Enterprise Manager to access the database using the Sql*plus tool command How to set the environmen

onA.uid=B.uid--left connection (based on left table, connection right with connection data, not NULL) Select * fromQ_user a Left JoinUserInformation b--inner can be omitted onA.uid=B.uid--Right connection (based on the right table) Select * fromQ_user a Right JoinUserInformation b--inner can be omitted onA.uid=B.uid--self-connect (just connect yourself to a table and take a different alias) Select * fromQ_user a Right JoinQ_user b--inner can be omitted onA.uid=B.uid----------------Union-

Tags: svn Java code Management version Control co-developmentSteps to use the SVN plugin in myeclipase: Find MyEclipse10 in the installation directory, under the Dropins folders, such as: D:\MyEclipse\MyEclipse 10\dropins ; in Dropins svn folder; decompression SVN plugin will features file and plugins file copy to svn folder, restart myeclipse can appear svn ! 4 Click window>>show view>>other on the myeclipse menu bar .5. Click on the SVN repository

/zeroof=/student/studentfile bs=1m count=200Du-sh/studentExample:Re-establish a disk partition/DEV/VDB7Mkdir/studentchmod 777/studentLs-ld/studentMount/dev/vdb7/studentls-ld/student # #此时权限改成了755Note: First hang the device and then change the directory permissions, because the directory permissions itself is recorded in the device, each mount before and after the installation of the device is not the same, just start reading is/dev/vda1, mount after reading is/dev/vdb7.8. Encryption of the devic

snowball.SummarySo why do we have to learn a new language? Because none of the tools are available for all goals. And we have different projects, different problems, different architectures. Perhaps the first thing we should consider before enabling a new application and choosing a technology stack is to solve the actual business problem before we can choose the best and most realistic tool.Don't start with tools and hobbies. Start with the problem and find out the solution. Only by understandi

used to set the identity Fuzhou generator. Hibernate provides the identifier generator interface: The Identifiergenerator interface, and provides a variety of built-in implementations. Here are a few simple examples:Increment:hibernate automatically increments the identifier, each increment is 1Identity: Generates an identifier from the underlying database. The prerequisite is that the underlying database supports autogrow field typesSequence: Generates identifiers based on the sequence of the

selector a "#", the difference between the ID and class is: ID does not allow two of the same ID, the display effect is as follows: Declaration of CSS for css There are three kinds, collective declarations, Global declarations and nested declarations, see below two examples: The effect is as follows: bottom This example is a nested declaration, can help us find the exact area we want to control: Nested declarations for The effect is as follows:

Proficient in CSS version2 note Picker, version2 1. Common selector:① The element selector specifies the element to apply the style. For example, p {color: # fff ;}② The descendant selector looks for the descendant of a specific element or element. for example: body p {color: # ccc;} the difference between this selector and the sub-Selector body> p is: body> p refers to all nodes under the body as sub-elements P, the descendant Selects all node P unde

Article Title: proficient in building initramfs stepbystep (4 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 11. automatically generate Device Files under/dev In the previous section, when we used the chroot method to test busybox, we used the "bind" method to map the device files in/dev of the host to the dev

Article Title: proficient in building initramfs stepbystep (9 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 27. Directly compile the cpio package file into the kernel If we have an init ramfs in the cpio format, we can directly compile it into the kernel during kernel compilation. Recall the content in section

Article Title: proficient in building initramfs stepbystep (11 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Install klibc (1) download the klibcsource code from linux/libs/klibc/"> http://www.kernel.org/pub/linux/libs/klibc/. the latest version is 1.5. (2) unlock the source code and create a symbolic link to

15 days proficient in WCF-how does the client know the list of functions provided by the server on the third day, wcfclient When we go to health care, we usually ask the girl what services and prices can be provided here. At this time, the girl may dictate some services or provide a service list. In the same way in wcf, only the client can understand what functions the service can provide, the client can perform operations based on the functions provi

15 days proficient in WCF-three tips you need to know on the fifth day 1. A service is a set of endpoints. When developing wcf, you may have noticed that a service can publish multiple endpoints. This is indeed the case, it is called "a service is a collection of endpoints ". For example, a Common Service publishes a service endpoint and a metadata endpoint, right... After careful consideration, this issue is quite interesting. Since a service can pu

see the right scroll bar is also changing, the code is very simple, ScrollBar has a lot of properties, the small partners can try their own hands.Small Editor's note: The main article is a simple introduction of the CSS on how to set up the page and browser related knowledge points, a total of three sections for detailed introduction, including hyperlink effects, CSS Control mouse arrows, page scroll bar, which details the hyperlink effect, Hyperlink effects include dynamic hyperlinks, push-but

10px #CCCCCC, 0 0 15px #CCCCCC, 0 0 20px #095816, 0 0 25px #095816, 0 0 30px #095816, 0 0 50px #095816, 0 0 80px #095816, 0 0 100px #095816, 0 0 150px #095816;} Paragraph effect : 1. Alignment: Horizontal and vertical2, spacing settings: line spacing, word spacing 3. Enlarge the initial letter Image effect: 3, mixed: Text wrapping summary: CSS enables precise pixel-level control of the placement of objects in Web pages, has the ability to edit Web pag

and run the effect as shown below;the effect of the operation is as follows:When we do the Web page, sometimes we need a horizontal menu to display, and in the CSS can be very easy to change the menu. Let's take a look at the example code and how it works:the effect of the operation is as follows:Analysis, the above code, first of all, this body part is exactly the same as our example, the difference is only the CSS settings, you can easily implement the menu of the vertical and horizontal conv

also convert the temporary object to a persisted object when it cleans up the cache.Hibernate guarantees that in the cache of the same session instance, each record in the data table only corresponds to a unique persisted object. As follows:Session Session1 = sessionfactory. Opensession();Session Session2 = sessionfactory. Opensession();Transaction tx1 = Session1. BeginTransaction();Transaction TX2 = Session2. BeginTransaction();Customer A = (customer) Session1. Load(Customer. Class, New Long (

Instantiateviewcontrol lerwithidentifier:@ "Blue"]; } [UIView Setanimationtransition:uiviewanimationtransitionflipfromleft forview:self.v Iew Cache:yes]; [Self.yellowViewController.view Removefromsuperview]; [Self.view InsertSubview:self.blueViewController.view atindex:0]; } [UIView commitanimations];} @end3, Code download: https://github.com/Simba-Hu/View-Switcher.git[email protected]: Simba-hu/view-switcher.gitThird, summaryView ControllerStoryboardUiviewcontroller