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13. T-SQL and SQL query AnalyzerWhat is SQL?What is T-SQL?Introduce new features of T-SQLHow to Use T-SQLSummaryIn this chapter, we will introduce some basic concepts about the Structured Query Language What is SQL?　SQL is a database query and programming language used to access data and query, update, and manage relational database systems. The US National Bureau of Standards (ANSI) and the International Organization for Standardization (ISO) have de

, whether in C or C ++, if the function does not accept any parameters, you must specify the parameter as void. Rule 3 be careful when using the void pointer type According to the ANSI (American National Standards Institute) standard, you cannot perform algorithm operations on the void pointer, that is, the following operations are invalid: Void * pvoid;Pvoid ++; // ANSI: ErrorPvoid + = 1; //

file to which the Implementation resides For example, if you specify the MessageBox function in user32.dll, You need to identify the function (MessageBox) and its location (user32.dll, USER32, or USER32 ). The Microsoft Windows Application Programming Interface (Win32 API) can contain two versions of each character and string processing function: the single-byte character ANSI version and the double-byte character Unicode version. If this parameter i

earlier versions, the only difference between it and the UTF-16 is that it does not include 'supplemental characters', so it only uses two bytes for character encoding. Currently, this encoding mode is out of date. 4. UTF-8 encoding: compatible with ASCII encoding; uses two bytes for Latin and Greek; other common characters including Chinese characters use three bytes; the remaining few characters use four bytes. ISO8859-1 :( Oracle comrades may have seen this WE8ISO89859P1, that's it .) ISO885

MSO; MSO-font-kerning: 1.0pt; MSO-ANSI-language: En-US; MSO-Fareast-language: ZH-CN; MSO-bidi-language: AR-SA "> tab-stops:list 21.0pt"> tab-stops:list 21.0pt">10.0pt; font-family: wingdings; MSO-Fareast-font-family: wingdings; MSO-bidi-font-family:Wingdings; color: #333333 ">Subject: Textbook font-family:; MSO-bidi-font-family: Arial; color: Black ">MSO; MSO-bidi-font-family: Arial; color: Black "> Children Write: class is boring. Color: Black ">MSO;

1;}Main (){Printf ("% d", fun (2 ));Getchar ();}Compiling is correct and 1 is output. In C, parameters of any type can be transferred to a function without parameters. However, compiling the same code in C ++ compiler will cause an error. In C ++".Therefore, whether in C or C ++, if the function does not accept any parameters, you must specify the parameter as void.Rule 3 be careful when using the void pointer typeAccording to the ANSI (American Nati

Using PHP to read file 3.txt, but there is a garbled problem, D:/3.txt is the Utf-8 file. Code: $f 1 = fopen (' d:/3.txt ', ' R '); $str = fread ($f 1,10000); Fclose ($f 1); Echo substr ($STR, 1, 3); Copy CodeThere is a BOM problem, Microsoft in order to mark this text as UTF text, add three bytes, respectively:ord ($charset [1]) = = 239 ord ($charset [2]) = = 187 Ord ($ CHARSET[3] = = 191 The code above is the PHP code to dele

Solution to PHP file garbled reading When you use PHP to read the file 3.txt, garbled characters occur. D:/3.txt is a UTF-8 file. Code: $ F1 = fopen ('d:/3.txt ', 'r '); $ Str = fread ($ f1, 10000 ); Fclose ($ f1 ); Echo substr ($ str, 1, 3 ); To mark this text as utf text, Microsoft adds three bytes: ord ($ charset [1]) = 239 ord ($ charset [2]) = 187 ord ($ charset [3]) = 191 the above code deletes the php code of BOM.The screenshot can sta

The cglib version may be faulty. font-family:"微软雅黑","sans-serif";mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"> font-family:"微软雅黑","sans-serif";mso-ascii-font-family:"Times New Roman";mso-hansi-font-fam

1. Distinguishing Wchar_t,char,wcharANSI: Char, a string handler function is available: strcat (), strcpy (), strlen (), and other functions that begin with Str.unicode:wchar_t is the data type of the Unicode character, which is actually defined in:typedef unsigned short wchar_t;In addition, there is such a definition in the header file: typedef wchar_t WCHAR; So WCHAR is actually wchar_t.wchar_t can be used with string handlers: Wcscat (), wcscpy (), wcslen (), and other functions that begin wi

I. Overview of ECDSAElliptic Curve Digital Signature Algorithm (ECDSA) is the simulation of digital Signature Algorithm (DSA) using Elliptic curve cryptography (ECC). ECDSA became the ANSI standard in 1999 and became the IEEE and NIST Standard in 2000. It was accepted by ISO in 1998, and some of its other standards are also considered in the ISO. Unlike the common discrete logarithm problem (discrete logarithm problem DLP) and the large number decompo

countries and regions have developed different standards, resulting in gb2312,big5,jis and other coding standards. Typically, a 2-byte range of 0x80~xff is used to represent 1 characters. For example: Chinese characters in Chinese operating system, using [0xd6,0xd0] These two bytes of storage. These use 2 bytes to represent an extended encoding of one character, called ANSI encoding. Under the Simplified Chinese system,

Reference article: http://blog.csdn.net/wuchen1004/archive/2010/08/03/5786537.aspx Http://www.codeproject.com/KB/files/ConfigString.aspx Because the Windows low-level processing string is handled in Unicode, the project for Unicode is now commonly used when developing software with VC. In Unicode engineering, reading and writing text files can have a rather tangled problem: In general, our new and edited text files are in ANSI format, while in the

Mysqlusetest1; ReadingtableinformationforcompletionoftableandcolumnnamesYoucanturnoffthisfeaturetogetaquickerstartupwith-ADatabasechangedmysql mysql> use test1;Reading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedmysql> set session sql_mode="ANSI";Query OK, 0 rows affected (0.01 sec)mysql> create table t (d datetime);Query OK, 0 rows affected (0.03 sec)mysql> in

The coding methods and problems of win, PY, notepad++ first to say the conclusion: Because the default encoding used by Win CMD is GBK (ANSI), if it encounters bat or Python's Chinese needs to be displayed in cmd, if garbled, first check whether because it is not 1. GBK encoded in Chinese or 2. is converted to GBK encoding or 3 in code. In Python code, it is a Unicode object . do not in win under the text document editor with your own utf

First, let's take a look at this question: "Howmany bytes is the memory space in the Java language that the string" java "occupies? "To answer this question we must first understand what is" byte "and what is" character ". byte: bytes are units that transmit information over the network (or store information in hard disks or in memory). Bytes are a unit of measurement used by computer information technology to measure storage capacity and transmission capacity, and1 bytes equals 8-bit binary, wh

mentlementary characters. 3.UCS-2 Coding: Is the implementation of UNICODE earlier versions, it is the only difference with the UTF-16 is that it does not include 'supplemental characters', so it only uses two bytes for character encoding.Currently, this encoding mode is out of date.. 4.UTF-8 Coding: Compatible with ASCII encoding. Two bytes are used for Latin and Greek characters. Other common characters including Chinese characters use three bytes. The remaining few characters use four bytes.

Go to: http://www.360doc.com/content/12/0807/01/9290626_228750141.shtml1. Distinguishing Wchar_t,char,wcharANSI: Char, a string handler function is available: strcat (), strcpy (), strlen (), and other functions that begin with Str.unicode:wchar_t is the data type of the Unicode character, which is actually defined in:typedef unsigned short wchar_t;In addition, there is such a definition in the header file: typedef wchar_t WCHAR; So WCHAR is actually wchar_t.wchar_t can be used with string handl

pointer typesBy the ANSI (American National standards Institute) standard, you cannot perform algorithmic operations on void pointers, that is, the following operations are not valid:void * PVOID;PVOID; ANSI: ErrorPVOID = 1; ANSI: ErrorThe ANSI standard is determined because it insists that the pointer to the algorith

he is char*, under Unicode It is unsigned char*, This allows you to redefine a macro for different character set conversions.The meaning of LPTSTR, LPCSTR, LPCTSTR and LPSTR:The Lpstr:32bit pointer points to a string of 1 bytes per characterThe LPcstr:32-bit pointer points to a constant string, each character occupies a 1-byte LPCtstr:32-bit pointer to a constant string, each character may account for 1 bytes or 2 bytes, depending on whether Unicode is defined lptstr:32 -bit pointers may accoun