SQL - Structured Query Language
Structured Query Language, is a computer language designed for retrieval and management of data in relational database management systems database schema creation and modification database object access control management.
History:
The first version of SQL was developed at IBM by Donald D. Chamberlin and Raymond F. Boyce in the early 1970s. Standardized in 1986 by ANSI. Subsequent versions of the SQL standard have been released as ISO standards
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In AutoCAD® 2006 software, you can now create blocks that are intelligent and flexible. This exciting new feature, called Dynamic Blocks, enables you to modify blocks within specific constraints. A block library might have dozens of windows (if architectural) or bolts (if mechanical). With Dynamic Blocks, you can create one block that takes the place of all these related blocks and be confident that modifications match the dimensions of their real-world objects. As a result, the process of finding the right block is much more efficient. Inserting and editing the block is practically error-free.
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In both e-business and e-science, we often need to integrate services across distributed, heterogeneous, dynamic “virtual organizations” formed from the disparate resources within a single enterprise and/or from external resource sharing and service provider relationships. This integration can be technically challenging because of the need to achieve various qualities of service when running on top of different native platforms. We present an Open Grid Services Architecture that addresses these challenges.
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