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Managing Expressions as Data in Relational Database
Managing Expressions as Data in Relational Database

... attributes such as type of insurance, coverage level, and geographical location. Now, a table holding the list of Insurance agents can store expressions defined on policyholder’s attributes to maintain an N-to-M relationship between the insurance agents and the corresponding policyholders. By using ...
Extreme Database programming with MUMPS Globals
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... In this example, the data items that make up the employee details (name, position, telephone number) have been appended together with the back-apostrophe character as a delimiter. MUMPS does not impose any controls or rules over how you construct your data structures : there’s no schema or data dict ...
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... Data Security Contains information about DLP and discovery transactions that resulted in incidents, such as the contents of an email body, including the From:, To:, and Cc: fields, as well as actual attachments. Transactions can also include Web posts, endpoint operations, and discovered as well as ...
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... • Describe the basic principals of the relational model of data • Define the modeling concepts and notation of the relational model • Learn about the relational constraints • Define the update operations of the relational model • Handling the violations of the integrity constraints • Learn about rel ...
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... cannot be used for the query, SQL Server 2014 will not always report a missing index in SHOWPLAN_XML and in the DMV sys.dm_db_missing_index_details. In particular, if a query contains equality predicates that involve a subset of the index key columns or if it contains inequality predicates that invo ...
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SQL

SQL (/ˈɛs kjuː ˈɛl/, or /ˈsiːkwəl/; Structured Query Language) is a special-purpose programming language designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).Originally based upon relational algebra and tuple relational calculus, SQL consists of a data definition language, data manipulation language, and a data control language. The scope of SQL includes data insert, query, update and delete, schema creation and modification, and data access control. Although SQL is often described as, and to a great extent is, a declarative language (4GL), it also includes procedural elements.SQL was one of the first commercial languages for Edgar F. Codd's relational model, as described in his influential 1970 paper, ""A Relational Model of Data for Large Shared Data Banks."" Despite not entirely adhering to the relational model as described by Codd, it became the most widely used database language.SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987. Since then, the standard has been revised to include a larger set of features. Despite the existence of such standards, though, most SQL code is not completely portable among different database systems without adjustments.
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