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什么是SQL?

SQL is one of the most important programming languages when it comes to managing data in general, and is indispensable to countless companies and corporations.
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SQL is a programming language that can help you manage your data more efficiently. Find an SQL architect to help you do just that at Freelancer.com!

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Gaurav C.
SQL Architect
$40每小时
4.9 (4158 工作)
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Ivan V.
SQL Architect
$32每小时
4.9 (3529 工作)
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Dream Dezine
SQL Architect
$25每小时
4.9 (3058 工作)
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Narola Infotech
SQL Architect
$15每小时
4.6 (1987 工作)
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DigitalArcanum
SQL Architect
$25每小时
4.9 (1969 工作)
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Silvyster A.
SQL Architect
$30每小时
4.9 (1932 工作)
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Murat K.
SQL Architect
$45每小时
5.0 (1698 工作)
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Imara Software Solutions
SQL Architect
$35每小时
4.9 (1669 工作)
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如何雇佣一名优秀的威客SQL Architect

Structured query language, more widely recognized as SQL, is a special purpose programming language and a standard language for relational database management systems. SQL is effective in communicating with and managing data held in a relational database. A majority of database products available are based on SQL programming language, although customization of the standard language using proprietary extensions is common. Oracle, Sybase, Microsoft SQL Server, Access and many other leading databases use SQL.
SQL is primarily a declarative language, a non-imperative programming approach where appropriate results are identified as opposed to explicit commands that must be conducted. However, SQL does also include some procedural elements. SQL incorporates three different language varieties, data definition, data manipulation and data control all contribute to SQL outcomes.  
Donald D Chamberlin and Raymond F Boyce are credited with the development of SQL in the early 1970s. Experts in relational algebra and tuple relational calculus, the pair created the programming type to communicate with, retrieve and manipulate data from IBM's original database. They termed the language SEQUEL originally, referring to structured English query language, although a trademark conflict with a UK company saw it later changed to SQL.
Oracle, at the time named Relational Software, observed the concepts of Chamberlin and Boyce and saw a widespread application for the programming language. They developed their alternate version of SQL holding aspirations of securing business with US Government agencies. They began selling SQL RDBMS in June 1979.
The American National Standards Institute (ANSI) and International Organization for Standardisation (ISO) confirmed SQL as a standard in 1986 and 1987 respectively. Since then SQL has continued to evolve to include a larger set of features.
SQL programming language includes several language elements. Clauses are integral components of statements and queries. Expressions combine values operators and SQL functions. Predicates are used to limit the effect of statements and queries or change program flow. A query is an inquiry into the database using the SELECT statement. Statements control transactions, connections, sessions, perform diagnostics and more.
If you are searching for an SQL programmer qualified in computer science, management information systems or information science, or you require a professional employee adept at logical thinking, problem-solving, with a detail-oriented approach and strong programming skills, you should consider the services of a freelancer.
Freelancer.com is a crowdsourcing marketplace and home to thousands of computer programming specialists well versed in SQL programming language. Freelancer.com allows potential employers to post jobs or projects that freelancers can bid for selection. Freelancer is free to join, post a project and receive bids. Once you've posted a project, you'll receive bids within minutes. Employers can review a freelancer’s portfolio and discuss project requirements directly before making a decision on the perfect candidate. With over 19 million users, you'll be sure to find the perfect match for your project.
With Freelancer, you get access to the best talent from around the world, and at an affordable price too! Post a project today to find the perfect freelancer for your next SQL project. 
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如何聘用一名SQL Architect进行工作

发布工作

1. 发布工作

马上告诉我们您需要做什么。
选择一名威客

2. 选择一名威客

立刻获得竞标并选出最佳。
追踪进程

3. 追踪进程

随时与您的威客沟通并审查他们的工作。
安全支付

4. 安全支付

当您完全满意时才会支付。

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