Structured Query Language

Among many approaches to manipulating a relational database, the most prevalent one is a language called SQL (Structured Query Language) [2]. 

Most clinical data management systems used for clinical trials today store their data in relational database software such as Oracle or Microsoft SQL Server. A relational database is composed of a set of rectangular data matrices called tables that relate or associate with one another by certain key fields. The language most often used to work with relational databases is structured query language (SQL). The SAS/ACCESS SQL Pass-Through Facility and the SAS/ACCESS LIBNAME engine are the two methods that SAS provides for extracting data from relational databases. 

Both the nucleic acid sequences and the protein sequences derived from the biological information are collected in most such databases. Large amounts of data in these databases need to be sorted, stored, retrieved, and analyzed. Selection of subsets of data for particular analysis should also be done. IT providers designed such a data warehouse and developed an interface that provides an important benefit to researchers by making it easy to access the existing information and also to submit new entries (i.e., datamining) (Table 5.6). Middlewares and structured query language (SQL) softwares were developed for this purposes. The former one is used... 

The Microsoft Access database (http //www.microsoft.com/) is a collection of data and objects related to a particular topic (Hutchinson and Giddeon, 2000). The data represent the information stored in the database, and the objects help users define the structure of that information and automate the data manipulating tasks. Access supports SQL (Structured Query Language) to create, modify, and manipulate records in the table to facilitate the process. It is a table-oriented processing. The user is referred to the Microsoft Access User s Guide or online Help for information. 

Are records protected during record retention period Accessible by database commands, structured query language (SQL), and so on ... 

Data can be transferred via data exchange technologies, such as extensible Markup Language (XML) and interface languages like Structured Query Language (SQL). 

SQL (structured query language) A language designed by IBM for using relational databases. 

There are many books that describe relational database management systems (RDBMS) and the structured query language (SQL) used to manipulate the data. Understanding SQL is important, and this book contains an introduction to SQL. However, the focus is on the concepts of relational data. One goal is to show how a proper integration of a new molecular structure data type yields a powerful, extended relational database for use in chemistry. For those of you new to relational databases, it is expected that the SQL introduction will suffice for your understanding of the concepts in this book. For those of you already familiar with SQL, it is hoped that you will see how the extensions described here provide a powerful, integrated way to handle molecular structures within the database. In either case, there are plenty of practical SQL examples contained in this book. 

Client programs are discussed in later chapters of this book. The structured query language (SQL) designed for creating, selecting, deleting, and updating the database is discussed in Chapter 3. 

It is essential that the schema of tables be created in a way that can easily answer such questions. During the design of a schema, it is useful to prepare structured query language (SQL) queries that will provide the answers to these questions. If it proves difficult or awkward to use the schema to answer these questions, the schema must be redesigned. Do not underestimate the importance of time and effort spent during the design of a database schema. 

Files, such as SDF molfiles3 or PDB4 files are commonly used to represent molecular structures. The data in these files contain information about the atoms, atom charges and aromaticity, and bonds between the atoms. It is possible to define a relational table where each of the data fields in the file is stored in a separate column. One could write structured query language (SQL) to store and search data in such tables, but there is a more succinct way to represent the same information. 

This chapter describes some of the aspects of SMIRKS and shows how it can be integrated into a relational database using new structural query language (SQL) functions. It discusses ways in which chemical transformations and reactions can be used to improve the robustness and usefulness of a chemical relational database. 

Searching for structures in the structure table can be done in many ways, but several important methods are discussed here. First, a structure can be located directly using the following structured query language (SQL). 

This Appendix contains structured query language (SQL) functions and tables too large or complex for the explanatory nature of the earlier chapters. These functions and tables are practical, rather than explanatory. They all follow PostgreSQL syntax. Some of them require the core functions described in Chapter 7 of this book, for example, match, cansmiles, and count matches. Those functions are available in the CHORD product from gNova, Inc. This Appendix also contains a PerlMol implementation, a FROWNS implementation, and an OpenBabel implementation of the core functions for PostgreSQL. 

Introduces the concepts of relational database management systems and the structured query language... 

Only few years ago, system interfaces required special programs developed in a language such as Structured Query Language (SQL), C or C++ to link applications directly to each other or through interfaces of shared files or database tables. 

One of the main reasons for the relational model s wide acceptance and use is its powerful and flexible ad hoc query capability. Most relational DBMS products on the market today use the same query language. Structured Query Language (SQL). SQL is considered a fourth-generation language (4GL) that allows the user to specify what must be done without spectfying how it must be done (Rob and Coronel 1997). The relational DBMS then translates the SQL request into whatever program actions are needed to fulfill the request. This means far less programming for the user than with other database models or earlier file systems. 

SQl, see Structured Query Language SQP (successive quadratic programming), 2562 Square-root rule of inventory consolidation, 2071... 

ORACLE is available in our company also on the VAX computer cluster. Figure 1 presents the major relevant functions. The kernel comprises all software for the management of the database and other parts of the system. Data are stored in a collection of tables described by a dictionary. A table consists of columns and rows. SQL (Structured Query Language), a standard query language, forms a shell round the kernel. Instructions for the kernel are passed down via SQL. 

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