英文字典中文字典Word104.com

中文字典辭典英文字典 a b c d e f g h i j k l m n o p q r s t u v w x y z

SQL

結構式查詢語言

The Free On-line Dictionary of Computing (foldoc)

/S Q L/ An industry-standard
language for creating, updating and, querying {relational
database management systems}.

SQL was developed by {IBM} in the 1970s for use in {System R}.
It is the {de facto standard} as well as being an {ISO} and
{ANSI} {standard}. It is often embedded in general purpose
programming languages.

The first SQL standard, in 1986, provided basic language
constructs for defining and manipulating {tables} of data; a
revision in 1989 added language extensions for {referential
integrity} and generalised {integrity} {constraints}. Another
revision in 1992 provided facilities for {schema} manipulation
and {data administration}, as well as substantial enhancements
for data definition and data manipulation.

Development is currently underway to enhance SQL into a
computationally complete language for the definition and
management of {persistent}, complex objects. This includes:
generalisation and specialisation hierarchies, {multiple
inheritance}, user defined {data types}, {triggers} and
{assertions}, support for {knowledge based systems},
{recursive query expressions}, and additional data
administration tools. It also includes the specification of
{abstract data types} (ADTs), object identifiers, {methods},
{inheritance}, {polymorphism}, {encapsulation}, and all of the
other facilities normally associated with object data
management.

The emerging {SQL3} standard is expected to be complete in
1998.

According to Allen G. Taylor, SQL does __not__ stand for
"Structured Query Language". That, like "SEQUEL" (and its
pronunciation /see'kw*l/), was just another unofficial name
for a precursor of SQL. However, the IBM SQL Reference manual
for DB2 and Craig Mullins's "DB2 Developer's Guide" say SQL
__does__ stand for "Structured Query Language".

{SQL Standards (http://jcc.com/sql_stnd.html)}.

{An SQL parser
(ftp://ftp.ora.com/published/oreilly/nutshell/lexyacc/)} is
described in "Lex & Yacc", by Levine, Mason & Brown published
by O'Reilly.

{The 1995 SQL Reunion: People, Projects, and Politics
(http://mcjones.org/System_R/SQL_Reunion_95/)}.

["A Guide to the SQL Standard", C.J. Date, A-W 1987].

["SQL for Dummies", Allen G. Taylor, IDG Books Worldwide].

(2005-11-17)

font-style:italic;">V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006) (vera)

Structured Query Language (ISO 9075, DB, 4GL)

請選擇你想看的字典辭典：

單詞	字典	翻譯
sql	查看　sql　在Google字典中的解釋	Google英翻中〔查看〕
sql	查看　sql　在Yahoo字典中的解釋	Yahoo英翻中〔查看〕

安裝中文字典英文字典查詢工具!

中文字典英文字典工具:

選擇顏色:

<style type="text/css">#word104_1 br {display:none;}</style>
<form id="word104_1" method="post" action="http://www.word104.com/index.php" target="_blank">
<div style="width: 140px;border:1px solid #000;background-color:#ffffff;padding: 0px 0px;margin: 0px 0px;align:center;text-align:center;overflow:hidden;"><div id="xcolor1_1" style="font-size:12px;color:#183a00;line-height:16px;font-family: arial; font-weight:bold;background:#94abf0;padding: 3px 1px;text-align:center;"><a href="http://www.word104.com/" alt="英文字典中文字典" title="英文字典中文字典" id="word_name104_1" style="color:#000000;font-size:14px;text-decoration:none;line-height:16px;font-family: arial;" >英文字典中文字典</a></div><table width=100% style='align:center;text-align:left;font-size:12px;background-color:#ffffff;color:#333333;'>
<tr><td style="text-align:center;border:0"><input type=hidden name="word104_hi" value="1">輸入中英文單字</td></tr><tr><td style="text-align:center;border:0"><input type="text" name="word104_input" value="" size=10 style="background-color:#ffffff;color:#000;text-decoration:none;font-family: arial;rial;border:1px solid #999;padding:1px!important;"></td></tr><tr style='line-height: 26px;'><td style="text-align:center;border:0"><input type=submit style="background-color:#ccc;color:#000;border:0 none;cursor:pointer;" value="查詢字典"></td></tr></table></div>
</form>

英文字典中文字典相關資料:

SQL Tutorial - W3Schools
SQL is a standard language for storing, manipulating and retrieving data in databases Our SQL tutorial will teach you how to use SQL in MySQL, SQL Server, MS Access, Oracle, PostgreSQL, and more
SQL - Wikipedia
Introduced in the 1970s, SQL offered two main advantages over older read–write APIs such as ISAM or VSAM Firstly, it introduced the concept of accessing many records with one single command Secondly, it eliminates the need to specify how to reach a record, i e , with or without an index
SQL Tutorial - GeeksforGeeks
Whether you want to create, delete, update or read data, SQL provides commands to perform these operations Widely supported across various database systems like MySQL oracle, PostgreSQL, SQL Server and many others
SQL Cheat Sheet ( Basic to Advanced) - GeeksforGeeks
This SQL Cheat Sheet is your quick-reference guide for working with relational databases It helps you recall key commands, logic, and query patterns to manage, manipulate, and control data efficiently
Microsoft SQL Server downloads
Get started with Microsoft SQL Server downloads Choose a SQL Server trial, edition, tool, or connector that best meets your data and workload needs
SQL Tutorial: Learn SQL from Scratch for Beginners
Whether you’re a software developer, database administrator, data analyst, or data scientist, this SQL tutorial will help you unlock the power of SQL for managing and analyzing data
SQL Syntax - W3Schools
In this tutorial we will teach you all about the different SQL statements A database most often contains one or more tables Each table is identified by a name (e g "Customers" or "Orders"), and contain records (rows) with data In this tutorial we will use the well-known Northwind sample database (included in MS Access and MS SQL Server)
Microsoft SQL Server Blog | News and Best Practices
Learn how to unleash the power in your data and get the latest Microsoft SQL Server news, updates, and best practices from Microsoft experts
FreeSQL - Oracle
Write, run, and share real Oracle SQL directly in your browser Learn SQL fundamentals, experiment with real data, and explore community scripts with zero setup and no installation required
SQLBolt - Learn SQL - Introduction to SQL
SQL, or Structured Query Language, is a language designed to allow both technical and non-technical users to query, manipulate, and transform data from a relational database And due to its simplicity, SQL databases provide safe and scalable storage for millions of websites and mobile applications Did you know?

中文字典-英文字典 2005-2009

|中文姓名英譯,姓名翻譯 |简体中文英文字典