mcsa study

BootStrap3 Study Notes (1) -- mesh system, bootstrap3 Study Notes Code and table from: http://www.tutorialrepublic.com/twitter-bootstrap-tutorial/bootstrap-grid-system.php If a grid is displayed, the Code should look like this: Col-* indicates the column width occupied by the grid system for different types of devices. Extremely smallMobile phone ( SmallFlat Panel (≥768px) MediumCompu

Swift Study Notes (2): handle errors and swift Study Notes Directory: Do-catch Assertions Do-catch In Swift, throws can be used to throw exceptions during program execution, and do... catch can be used externally to catch exceptions thrown by methods limited by try. Func makeASandwich () throws {// This function may throw an error} do {try makeASandwich () eatASandwich ()} catch SandwichError. o

Mysql Study Notes 2 (Table constraints) and mysql Study NotesOperation table Constraints Integrity is the accuracy and consistency of the index data, and integrity check is to check the data accuracy and consistency. The mysql database management system provides a mechanism to check whether the data in the database meets the specified conditions. To ensure data accuracy and consistency in the database, t

Mysql study Note 3 (INDEX), mysql study note IndexIndex Database Object Index: A combination of data. By indexing objects, you can quickly query specific records in the database object table. It is the most common way to improve performance. An index contains one or more columns in the table in a certain order. Index operation: Create, modify, and delete indexes. The database object index

MySQL study note _ 2_MySQL create a data table (on) and study note _ 2_mysqlCreate a data table (on) in MySQL) I. Create an SQL statement model for a data table [weak type] CREATETABLE [if not exists] Table Name ( Type of field name 1 column [attribute] [Index], Type of field name 2 column [attribute] [Index], ... Type of field name n column [attribute] [Index], ) [Table attributes] [Table character set];

MySQL Study Notes _ 10_MySQL Advanced Operations (below) and study notes _ 10_mysql MySQL Advanced Operations (below) V. MySQL pre-processing statements 1. Set the pre-processing stmt and pass a data as the where judgment condition. Prepare stmt from "select * from table_name where id> ?"; 2. Set a variable Set @ I = 1; 3. Execute the pre-processing statement Execute stmt using @ I; 4. Delete preproces

MySQL Study Notes _ 9_MySQL Advanced Operations (on) and study notes _ 9_mysql MySQL Advanced Operations (I) I. MySQL table replication Create table t2 like t1; # copy the table structure. t2 can learn all the table structures of t1. Insert into t2 select * from t1; # copy table data, but this still has a defect, because the corresponding column is not taken into account, because t1 and t2 table structure

MySQL Study Notes _ 7_MySQL common built-in functions and Study Notes _ 7_mysql MySQL common built-in functions Note: 1) it can be used in SELECT/UPDATE/DELETE and where, orderby, and having. 2) use the field name as a parameter in the function. The value of the variable is the value of each row corresponding to the field. 3) In programming languages such as functions provided in C ++, most MySQL function

Python Study Notes (6) and python Study Notes I. Classes and Instances The first object-oriented program: class Student(object): def __init__(self, name, score): self.name = name self.score = score def print_score(self): print '%s: %s' % (self.name, self.score)bart = Student('Bart Simpson', 59)lisa = Student('Lisa Simpson', 87)bart.print_score()lisa.print_score()The class name is

Mysql Study Notes-mysql database installation and mysql Study Notes 1. Run the mysql installation package and select Custom installation (the installation path should not contain Chinese characters; otherwise, an error will occur during installation !) 2. For a mysql instance to be successfully operated, three parts are required: server side, data segment, and data. 3. Server Software Directory: 4

C ++ Study Notes (10): iterator and Study Notes Generator We all know that we can use subscript operations to access string objects and vector objects. There is also a more general method that can be implemented. The name is iterator ). Similar to pointers, The iterator also provides indirect access to objects. As far as the iterator is concerned, its object is a character in the element or string in the co

Python Study Notes (7) and python Study Notes 1. dynamically add attributes and methods to a class: 1. dynamically add attributes and methods to an instance: The method bound to an instance does not work for another instance. Class Student (object): passs = Student () s. name = 'Michael '# dynamically bind an attribute print s to the instance. namedef set_age (self, age): # define a function as the instance

Introduction to HTML Study Notes (1) and introduction to html Study Notes 　　HTML(HyperText Markup LanguageHypertext Markup Language). 'hypertext 'indicates that a page can contain not only text information, but also images, links, and other non-text elements. Html, js, and jq are used togetherWebsite front-end developmentLanguage.XMLStandard, usePairedTags to program and generateDirectly executed by the bro

HTML Study Notes (2) color system and Study Notes System There are three types of Color Representation for html pages:English Representation,Hexadecimal RepresentationAndDecimal. The color passes through the three primary colorsRed, green, and blueThe three types are mixed in proportion. For example, the red decimal format is, 0, and 0. That is, the weights are 0 ~ 255,255 is the maximum, and 0 is the mini

(Linux Study Notes 1: Compressed) [20180209], Study Notes 20180209Study Note 1: compress the file extension by compressing the command at a.m. on April 9, February 5, 2015 *. tar, * .tar.gz ,*. tgz ,*. gz ,*. Z ,*. bz2 common compression commands gzip and bzip2, bzip2 compression ratio gzip is better tar can be used for file packaging, and supports gzip and bzip2 compressed tar-jvc-f filename.tar.bz2/direct

C ++ study notes 5 Containers and Study Notes containers 1. Use assign The assign operation first deletes all elements in the container, and then inserts the new elements specified by its parameters into the container. Like the constructor for copying container elements, if the two containers have the same type, their meta If the element type is the same, you can use the value assignment operator (=) to ass

Mysql Study Notes (log management), mysql Study Notes Logs: mysql logs that record the running status, daily operations, and error information of the database: Binary logs, error logs, and query logs. Binary log: records database operations in binary format, but does not record query statement error logs. This log records mysql server startup, information such as disabling and running errors query logs. Th

Swift 2.0 Study Notes (Day 12) -- talk about several special operators, swift Study Notes For Original Articles, please reprint them. Reprinted Please note: Guan Dongsheng's blog In addition to some common operators, there are also some other: • Reference Number (.): operator such as instance call attributes and methods. • Question mark (?) : Declares the optional type. • Exclamation point (!) :

MySQL self-study (III) and mysql self-study MySQL Data Type MySQL supports multiple data types, including numeric, date, and string.Value Type MySQL mainly provides INTEGER types: TINYINT/SMALLINT/MEDIUMINT/INT (INTEGER)/BIGINT You can add the AUTO_INCREMENT auto-increment constraint to the property field of the integer type. 1. Integer type in MySQL Value range of Integer type 2. floating point type and

Grunt Study Notes (for beginners) and grunt Study Notes 1. Before learning grunt, you must first have a simple understanding of nodejs. The steps for installing nodejs are simple. Install nodejs as prompted on the official website. Http://www.nodejs.org/ 2. Grunt Introduction Grunt is an automated project building tool. if you need to repeatedly execute tasks such as compression, compilation, unit testing