SQL是英文Structured Query Language的縮寫,意思為結(jié)構(gòu)化查詢語言。SQL語言的主要功能就是同各種數(shù)據(jù)庫建立聯(lián)系,進行溝通。按照ANSI(美國國家標準協(xié)會)的規(guī)定, SQL被作為關(guān)系型數(shù)據(jù)庫管理系統(tǒng)的標準語言。SQL語句可以用來執(zhí)行各種各樣的操作,例如更新數(shù)據(jù)庫中的數(shù)據(jù),從數(shù)據(jù)庫中提取數(shù)據(jù)等。目前,絕大多數(shù)流 行的關(guān)系型數(shù)據(jù)庫管理系統(tǒng),如Oracle, Sybase, Microsoft SQL Server, Access等都采用了SQL語言標準。雖然很多數(shù)據(jù)庫都對SQL語句進行了再開發(fā)和擴展,但是包括Select, Insert, Update, Delete, Create, 以及Drop在內(nèi)的標準的SQL命令仍然可以被用來完成幾乎所有的數(shù)據(jù)庫操作。下面,我們就來詳細介紹一下SQL語言的基本知識。
標簽: Structured Language Query SQL
上傳時間: 2013-12-20
上傳用戶:410805624
This application uses OleDb as a backhand communicator with the file to allow the user to : select, delete, Insert and modify the database and then save all the changes to the original file.
標簽: communicator application the backhand
上傳時間: 2014-01-21
上傳用戶:671145514
Pai has been a good sequence array. A few are imported, as called for under the original law will Insert its array
標簽: sequence imported original called
上傳時間: 2014-01-14
上傳用戶:鳳臨西北
SQL(Structured Query Language,結(jié)構(gòu)查詢語言)是一個功能強大的數(shù)據(jù)庫語言。SQL通常使用于數(shù)據(jù)庫的通訊。ANSI(美國國家標準學會)聲稱,SQL是關(guān)系數(shù)據(jù)庫管理系統(tǒng)的標準語言。SQL語句通常用于完成一些數(shù)據(jù)庫的操作任務(wù),比如在數(shù)據(jù)庫中更新數(shù)據(jù),或者從數(shù)據(jù)庫中檢索數(shù)據(jù)。使用SQL的常見關(guān)系數(shù)據(jù)庫管理系統(tǒng)有:Oracle、 Sybase、 Microsoft SQL Server、 Access、 Ingres等等。雖然絕大多數(shù)的數(shù)據(jù)庫系統(tǒng)使用SQL,但是它們同樣有它們自立另外的專有擴展功能用于它們的系統(tǒng)。但是,標準的SQL命令,比如"Select"、 "Insert"、 "Update"、 "Delete"、 "Create"和 "Drop"常常被用于完成絕大多數(shù)數(shù)據(jù)庫的操作。
標簽: Structured Language Query SQL
上傳時間: 2015-10-06
上傳用戶:nairui21
SQL(Structured Query Language,結(jié)構(gòu)查詢語言)是一個功能強大的數(shù)據(jù)庫語言。SQL通常使用于數(shù)據(jù)庫的通訊。ANSI(美國國家標準學會)聲稱,SQL是關(guān)系數(shù)據(jù)庫管理系統(tǒng)的標準語言。SQL語句通常用于完成一些數(shù)據(jù)庫的操作任務(wù),比如在數(shù)據(jù)庫中更新數(shù)據(jù),或者從數(shù)據(jù)庫中檢索數(shù)據(jù)。雖然絕大多數(shù)的數(shù)據(jù)庫系統(tǒng)使用SQL,但是它們同樣有它們自立另外的專有擴展功能用于它們的系統(tǒng)。但是,標準的SQL命令,比如"Select"、 "Insert"、 "Update"、 "Delete"、 "Create"和 "Drop"常常被用于完成絕大多數(shù)數(shù)據(jù)庫的操作。
標簽: Structured Language Query SQL
上傳時間: 2013-12-11
上傳用戶:qq1604324866
The goal of this library is to make ODBC recordsets look just like an STL container. As a user, you can move through our containers using standard STL iterators and if you Insert(), erase() or replace() records in our containers changes can be automatically committed to the database for you. The library s compliance with the STL iterator and container standards means you can plug our abstractions into a wide variety of STL algorithms for data storage, searching and manipulation. In addition, the C++ reflection mechanism used by our library to bind to database tables allows us to add generic indexing and lookup properties to our containers with no special code required from the end-user. Because our code takes full advantage of the template mechanism, it adds minimal overhead compared with using raw ODBC calls to access a database.
標簽: recordsets container library ODBC
上傳時間: 2015-10-11
上傳用戶:xlcky
Student result management system Use the C language realization system 2, the data structure making use of the structure body several realization student s result design 3, the system have increment, search, Insert, row preface etc. basic function 4, the each function mold piece request of system use the form of function realization 5, completion design mission combine write a course a design report. 6, student the existence document of the result information in
標簽: system realization management structure
上傳時間: 2013-11-29
上傳用戶:1966640071
4、 編寫一個過程。要求:有一個輸入?yún)?shù)和一個輸出參數(shù),過程里面要有自定義異常。從學生表中(tab_student)中尋找符合指定學號等于輸入?yún)?shù)的值,然后將找到的學生的姓名賦予輸出參數(shù),如果沒有符合條件的值則觸發(fā)異常。 Create table tab_student (sno char(8), sname varchar2(20), age integer, province varchar2(60), sex char(4)) Insert into tab_student values(‘001’,’zhou’,20,’江蘇徐州’,’男’) 上述表已經(jīng)創(chuàng)建,只需針對此表編寫即可。
上傳時間: 2015-11-13
上傳用戶:362279997
This article introduces how to use Visual C++ to develop ActiveX control by example.Then we compile script to Insert it into web page.from this ,it displays the strong life of the ActiveX controll in the development of netware.
標簽: introduces ActiveX article develop
上傳時間: 2015-12-02
上傳用戶:athjac
使用說明: 雙擊Demo.bat文件便可以執(zhí)行 (需要配置好jre||JDK環(huán)境) 請輸入sql語法關(guān)鍵字來測試改程序謝謝 目前支持的語法關(guān)鍵字如下設(shè)置: text.getSettings().setCase_Insensitive(false) // 不區(qū)分大小寫 text.getSettings().addKeyWord1("select") text.getSettings().addKeyWord1("commit") text.getSettings().addKeyWord1("from") text.getSettings().addKeyWord1("AND") text.getSettings().addKeyWord1("WHERE") text.getSettings().addKeyWord1("with ur") text.getSettings().addKeyWord1("VARCHAR") text.getSettings().addKeyWord2("Insert") text.getSettings().addKeyWord2("DECLARE") text.getSettings().addKeyWord2("distinct") text.getSettings().addKeyWord2("SET") text.getSettings().addFunctionKeyWord("int") text.getSettings().addFunctionKeyWord("COUNT") text.getSettings().setComment("--") //設(shè)置行注釋 當前版本主要改進塊注釋的算法 塊注釋示例: /* 12312334 "測試字符串" select count(*) from where with ur */
上傳時間: 2016-01-10
上傳用戶:l254587896
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