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[Oracle Study Notes], oracle Study Notes The content mainly includes: (1) three cycles and their simplification (2) Use of cursors (3) Exception Handling (4) Stored Procedure (5) storage functions (6) triggers (7) Other pl/SQL operations --------------- Loop definition variable --------------------Declare Cursor c1 is select * from emp; # Rec emp % rowtype; # I numeber: = 1; # V_count number; Begin # Selec

SCALA Study Notes (1), SCALA Study Notes (Variable When obtaining the variable value is time-consuming, you can use lazy var.Lazy val forLater = someTimeConsumingOperation () Scala> val first: rest = List (1, 2, 3)First: Int = 1Rest: List [Int] = List (2, 3)Function Definition "=" Is not just used to separate the function signature and function body. It also serves to tell the compiler whether to deduce th

SecureCRT simple settings (Study Notes 2), securecrt Study Notes Cainiao records.I. Change the terminal type Option-global option-default session-edit default settings-terminal-simulation-select type on the right side, and set the buffer size below 2. Set the font and appearance Upper window appearance-Right side settings-font set font type size, the following cursor can set the cursor type, color 3. L

Linux Study Notes (14) file system management and linux Study Notes1. Review partition and System (1) Partition types Linux partitions generally include primary partitions, extended partitions, and logical partitions. Where: A maximum of four primary partitions can be created; There can be only one extended partition, or one of the primary partitions, that is, the primary partition and the extended partitio

Linux Command help (study note 5) and linux Study Notes1. Get Command help1.1 internal and external commands In short, commands with storage locations in linux are external commands; An internal command is stored in a linux shell. Type to determine whether it is an internal command or an internal command [Root @ localhost ~] # Type help // view the internal and external types of the help Command help is a s

Linux File Types (Study Notes 6) and linux Study NotesI. File Types in Linux Common File: The first attribute displayed by ls-al is [-]. Directory file:The first attribute displayed by ls-al is [d]. Device Files: these files are generally stored in the dev directory. [B] [c] Ii. Common files 2.1 text files Stored in computer as ASCII code 2.2 binary files It is stored in a computer in binary form of te

[Swift] study notes (8)-class and structure, swift Study Notes 1. Definition of classes and struct Class: keyword class, struct: struct 2. Create instances of classes and struct (Instances in other languages are called objects .) let someResolution = Resolution()let someVideoMode = VideoMode() Isn't that easy? Why isn't there a keyword new .... It is the same as assigning a function to a variable. Ye

Mongodb Study Notes 07: mongodb Study Notes Export export in json or csv format Using import to import json or csv Mongodump exports binary bson structure data and index information Mongorestore imports binary files Mongoexport -H host -- port number-u user name-p password-d database name-c table name-f field1, field ..... export field-q query condition-o export file name -- csv is equivalent to -- t

Mongodb Study Notes 05 and mongodb Study NotesEnable authentication Mongod does not have the permission to start by default. You need to specify-auth to start, or set security. authorization to "enabled" in the configuration file"Create user Db. createUser (user, writeConcern) Document http://docs.mongodb.org/manual/reference/method/db.createUser/#db.createUser User format { user: " WriteConcern: For exa

[Struts2 Study Notes] Section 5: Compile the struts2 action Code and struts2 Study Notes Address: http://blog.csdn.net/sushengmiyan/article/details/40479299 Official documents: http://struts.apache.org/release/2.3.x/docs/coding-struts-2-actions.html Author: sushengmiyan Certificate -------------------------------------------------------------------------------------------------------------------------------

[Study Notes] JavaScript coding specification-type, Study Notes javascript Type Basic Type: when accessing the basic type, the type value should be operated directly. String number boolean null undefined Var a = 0; var B = a; B = 8; console. log (a, B); // 0, 8 Note: 1. Call the console in JavaScript to write logs. 2. Open the IE developer tool before you can use the console. By default,

CUBRID Study Notes 17 transaction rollback, cubrid Study Notes Syntax: ROLLBACK [WORK] The following statement will report an error Alter table code DROP s_name; Insert into code (s_name, f_name) VALUES ('D', 'Diamond '); ERROR: s_name is not defined. Roll back to repair broken wounds Rollback work; Come back Alter table code drop s_name; Insert into code (f_name) VALUES ('Diamond '); Commit work; Parti

Html Study Notes 3: html Study Notes Image Tag img Generally, the image is placed in the compiler, the Directory of the current project. Image map: map For example, if a map is located at a certain location, the map is directed to the local XX website. Application: select a part of the current image for Link However, the area of the image is completed by coordinates. Some software is used to divide t

Study Notes for Linux _ Day4 and Study Notes _ day4 The fourth day, continue learning. Today, I saw a saying, "What do you think is what you think? ", This sentence is a bit interesting !!! 1. Command for viewing File Content File dest: view the file type. In Linux, file types include text files, directories, linked files (hard links and soft links), script files (executable files), and binary files. Cat de

JAVA Study Notes (46)-internal class details, java Study NotesMember internal class /** Internal Class * is defined as a Class in another Class. It is called an internal Class. The Inner Class * contains internal classes and is called an external Class Outer Class ** Application Scenario: event processing in the form program ** category: * member internal class * local internal class * static internal class

JAVA Study Notes (20)-collection List, java Study NotesArrayList set /** ArrayList, which implements the List interface *. When declaring an array, you must specify the element type in the array, which can be the basic data type, it can also be a reference data type * When declaring a set, you can not specify the type of its elements. The default element type is the Object type */public class Test01 {public

LINUX Study Notes account and group management, linux Study NotesLINUX Account and Group Management UID: UserID: Save the file:/etc/passwd GID: GroupID save file:/etc/group /Etc/passwd file structure A row represents an account, which contains a system account and cannot be moved. For example: Root: x: 0: 0: root:/bin/bash A total of seven parts, separated: 1. Account name: account, corresponding to UID

FFmpeg programming study NOTE 2: audio re-sampling, ffmpeg Study Notes The core function swr_convert of ffmpeg for Implementing Audio re-sampling is very powerful. However, the comment of ffmpeg is too simple and such problems often occur in applications, in fact, swr_convert is also applied after the first execution of swr_convert in the loop of reading data> resampling> encoding data to check whether the

A Case Study of php infinitus classification and a case study of php Classification Author: White Wolf Source: http://www.manks.top/php_tree_deep.html this article copyright to the author, welcome to reprint, but without the author's consent must retain this paragraph of the statement, and in the Article Page clearly given the original connection, otherwise, you are entitled to pursue legal liability. The o

Swift 2.0 Study Notes (Day 13)-integer and floating-point data types, swift Study Notes For Original Articles, please reprint them. Reprinted Please note: Guan Dongsheng's blog Swift provides 8, 16, 32, and 64-Bit Signed and unsigned integers. These integer types follow the naming conventions of the C language. I have summarized the integer types in Swift: Integer example: Print ("UInt8 range: \ (UInt8.m