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b. A collection of related records that are stored as a single unit c. A named data structure such as a table, view, or index d. De ned in the same way by all software vendors e. A collection of interrelated data items that are managed as a single unit 4. A database management system is a. Software provided by the database vendor b. A collection of interrelated data items that are managed as a single unit c. Often abbreviated as DBMS d. A structure such as a table, view, or index e. A named data structure such as a table, view, or index 5. Basic services provided by the DBMS include a. Moving data to and from the physical les as needed b. Storage of data in tabular form c. Security mechanisms to prevent unauthorized data access and modi cation d. Generation of Entity Relationship Diagrams e. Support of a query language 6. Components of a relational database include a. ERDs b. Indexes c. Tables d. Relationships e. Constraints 7. In an ERD, maximum cardinality is shown with a. The notation <pk> above the relationship line b. A crow s foot on an end of the relationship line c. A circle drawn on the relationship line d. A vertical line drawn across the relationship line e. No symbol on the end of the relationship line

The dblib API (SQL Server)

The first major DBMS product to emphasize its callable API was SQL Server, in versions from both Sybase and Microsoft. For many years, the SQL Server callable API was the only interface offered by these products. Both Microsoft and Sybase now offer embedded SQL capabilities and have added newer or higher-level callable APIs, but the original SQL Server API remains a very popular way to access these DBMS brands. The SQL Server API also provided the model for much of Microsoft s ODBC API. SQL Server and its API are also an excellent example of a DBMS designed from the ground up around a client/server architecture. For all of these reasons, it s useful to begin our exploration of SQL APIs by examining the basic SQL Server API. The original SQL Server API, which is called the database library or dblib, consists of about 100 functions available to an application program. The API is very comprehensive, but a typical program uses only about a dozen of the function calls, which are summarized in Table 19-1. The other calls provide advanced features, alternative methods of interacting with the DBMS, or single-call versions of features that otherwise would require multiple calls.

19:

dblogin() Dbopen() dbuse() Dbexit()

8. Types of database constraints include a. NOT NULL b. Unique c. Primary key d. CHECK e. Relationship 9. Normalization is intended to solve the following problems: a. Slow performance b. Creation anomaly c. Insert anomaly d. Delete anomaly e. Update anomaly 10. To be in third normal form, a relation a. Must have a unique identi er b. Must have no transitive dependencies c. Must have no repeating groups or multivalued attributes d. Must be in rst normal form e. Must be in second normal form 11. SQL a. May be pronounced as the word sequel b. May be pronounced as the letters S-Q-L c. May be used to communicate with any database d. May be used to communicate with relational databases e. May be used to populate web pages with data 12. SQL is a. A standard language b. A nonprocedural language c. A procedural language d. An object-oriented language e. A declarative language

Provides a data structure for login information Opens a connection to SQL Server Establishes the default database Closes a connection to SQL Server

Basic statement processing dbcmd() dbsqlexec() dbresults() dbcancel() Error handling dbmsghandle() dberrhandle() Query results processing Dbbind() dbnextrow() dbnumcols() dbcolname() dbcoltype() dbcollen() Dbdata() dbdatlen() dbcanquery() Table 19-1. Binds a query results column to a program variable Fetches the next row of query results Obtains the number of columns of query results Obtains the name of a query results column Obtains the data type of a query results column Obtains the maximum length of a query results column Obtains a pointer to a retrieved data value Obtains the actual length of a retrieved data value Cancels a query before all rows are fetched Establishes a user-written message-handler procedure Establishes a user-written error-handler procedure Passes SQL statement text to dblib Requests execution of a statement batch Obtains results of next SQL statement in a batch Cancels the remainder of a statement batch

The first solar still, in the sense that we would recognize it now, was built in the mining community of Las Salinas in 1872, in the area which is now northern Chile. It was created by a Swedish technologist by the name of Charles Wilson. The plant was massive, about 4,700 square meters quite an engineering feat for the time.