1. SELECT statement
Basic syntax:
SELECT[ALL|DISTINCT] Field List
[Into table name]
[From table name]
[where-condition expression]
[GROUP by [All] field list]
[Having filter expression]
[Order By field List [Asc|desc]]
[Compute aggregate
Core Tip:JavaScript has the following kinds of operators: arithmetic operators, equivalent operators and all-in-one operators, comparison operators;
1. JavaScript has the following kinds of operators: arithmetic operators, equivalent operators and
No matter what language you use, you end up with business logic. In object-oriented programming languages, business logic is implemented in methods. Therefore, it is necessary for beginners to understand the basics of completing the Java class
vbscript| Tutorial | Operation VBScript A set of complete operators, including arithmetic operators, comparison operators, join operators, and logical operators.
Operator Precedence
When an expression contains more than one operator, each part is
An operator is something that can produce another value (thus the entire structure becomes an expression) by giving one or more of the values (in programming jargon, an expression).
The first is a unary operator, which only operates a single value,
3. The third form is if-else-if form The first two forms of if statements are generally used in two branches. When you have more than one branch selection, you can take the IF-ELSE-IF statement in the form of an if (expression 1) Statement 1;
1. Expression type
After you have defined the variables, you can assign them, a series of operations, such as change, computation, and so on, usually called an expression, that is, a set of variables, constants, Boolean, and operators, so that an
Server data type
Description
Synonymous
Bit
1 digits, value 0 or 1
Int
Integer
4 bytes, value is -2^31~2^31-1
Smallint
2 bytes, value is -2^15~2^15-1
Tinyint
1 bytes, value is 0~255
Decimal (P,s)
numeric data, with a fixed precision of p, and a
Server data type
Description
Synonymous
Bit
1 digits, value 0 or 1
Int
Integer
4 bytes, value is -2^31~2^31-1
Smallint
2 bytes, value is -2^15~2^15-1
Tinyint
1 bytes, value is 0~255
Decimal (P,s)
numeric data, with a fixed precision of p, and a
The data tables have been created, we can use the way we like to retrieve and display the information in the data table, the following for you to explain the application of the SELECT statement in MySQL, interested in touch can learn the
datasheet
1 type Alias
Three timestamp-related type aliases, Timediff represents the difference between two timestamps, the second is a timestamp in microseconds, and the third is a timestamp in 100 nanoseconds (0.1 subtle):
typedef Int64 TIMEDIFF;
javascript| Tutorial
JavaScript basic data Structure
JavaScript, which provides scripting languages, is very similar to C + +, except that it removes easily-generated errors such as pointers in C and provides a powerful class library. For people
Operator (operator) is used to manipulate data. Operators to compute, check the equation, perform assignments, manipulate variables, and do other, more bizarre work. There are many operators in C + + that do not want to list all, but list the most
Chinese arithmetic operator
These jobs are similar to those taught in basic schools.
Table 7-1. Arithmetic Operators (table 7-1 arithmetic operator)
Example Name result
$a + $b addition Sum of $a and $b.? /FONT>
$a-$b
1.awk Regular expression meta-character
\ code-changing sequence
^ Start match at beginning of string
$ start match at end of string
. Match any single string
[ABC] matches any character within []
[A-ca-c] matches characters (in alphabetical
As a ramble about the C # language specification, we will discuss the problem of operator overloading this month. Operator overloading (unless specified otherwise, the rest of this column
The partial abbreviation for "overload" refers to the ability
Asp.net| tutorial Mike the old cat
From: The ideal of an old cat
This tutorial is written in C # and ASP.net programming tutorials, what are the deficiencies please point out, or in the old cat ideal blog message.
This is a brief introduction to
Javascript
This article is Dengyong by the classic forum
Tsinghua University published the "Half a series of JavaScript", I read the book, some translated it. A few years ago looked, recently nothing, turned over, very helpful. This book should have
Today's small series for you to introduce the WPS table commonly used functions and functions of a simple method.
Foundation of Function Application
(i) Functions and formulas
1. What is a function
The WPS table function is a special formula
1, +: Plus
2,-: minus
3, *: Multiply
4,/: except
5,%: modulo, get the remainder of the division of two numbers
6. + +: Self-added
7 、--: Self-reduction
8, + +: Left add
9.-=: Left minus
10. *=: Left Multiply
11./=: Left apart
12,%=: Left
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