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  2. Data retrieval - Wikipedia

    en.wikipedia.org/wiki/Data_retrieval

    Data retrieval means obtaining data from a database management system (DBMS), like for example an object-oriented database (ODBMS). In this case, it is considered that data is represented in a structured way, and there is no ambiguity in data. In order to retrieve the desired data the user presents a set of criteria by a query. Then the ...

  3. Query plan - Wikipedia

    en.wikipedia.org/wiki/Query_plan

    A query plan (or query execution plan) is a sequence of steps used to access data in a SQL relational database management system. This is a specific case of the relational model concept of access plans. Since SQL is declarative, there are typically many alternative ways to execute a given query, with widely varying performance.

  4. Select (SQL) - Wikipedia

    en.wikipedia.org/wiki/Select_(SQL)

    Queries allow the user to describe desired data, leaving the database management system (DBMS) to carry out planning, optimizing, and performing the physical operations necessary to produce that result as it chooses. A query includes a list of columns to include in the final result, normally immediately following the SELECT keyword.

  5. Data modeling - Wikipedia

    en.wikipedia.org/wiki/Data_modeling

    The primary reason for this cost is that these systems do not share a common data model. If data models are developed on a system by system basis, then not only is the same analysis repeated in overlapping areas, but further analysis must be performed to create the interfaces between them.

  6. Cursor (databases) - Wikipedia

    en.wikipedia.org/wiki/Cursor_(databases)

    To use cursors in SQL procedures, you need to do the following: Declare a cursor that defines a result set; Open the cursor to establish the result set; Fetch the data into local variables as needed from the cursor, one row at a time; Close the cursor when done; To work with cursors you must use the following SQL statements

  7. Data manipulation language - Wikipedia

    en.wikipedia.org/wiki/Data_manipulation_language

    In SQL, the data manipulation language comprises the SQL-data change statements, [3] which modify stored data but not the schema or database objects. Manipulation of persistent database objects, e.g., tables or stored procedures, via the SQL schema statements, [3] rather than the data stored within them, is considered to be part of a separate data definition language (DDL).

  8. Laboratory information management system - Wikipedia

    en.wikipedia.org/wiki/Laboratory_information...

    Lab orders in the LIMS module of the GNU Health project. A laboratory information management system ( LIMS ), sometimes referred to as a laboratory information system ( LIS ) or laboratory management system ( LMS ), is a software -based solution with features that support a modern laboratory 's operations.

  9. Database Management Library - Wikipedia

    en.wikipedia.org/wiki/Database_Management_Library

    Database Management Library (DBL) is a relational database management system (RDBMS) contained in a C++ programming library. The DBL source code is available under the terms of the GNU General Public License. DBL was fully developed within two weeks, as a holiday programming project. It aims to be easy and simple to use for C++ programming.