Storage Retrieval

Download Database: Principles Programming and Performance by Patrick O'Neil PDF

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By Patrick O'Neil

The main complete creation to database programming and function to be had.

a whole and functional advent to database administration platforms for somebody who's, or needs to turn into, a database administrator, program programmer, or refined SQL consumer. Patrick O'Neil's pragmatic method of programming and function inside advertisement settings teaches you to create bug-free functions with the main effective use of assets.

beginning with primary relational techniques, the writer provides a complete variety of data approximately database criteria and items, together with Oracle, Ingres, DB2 and Sybase, and gives targeted, step- by-step insurance of SQL and database transaction programming.

extra informative than general listings of embedded SQL positive factors, O'Neil's presentation of embedded SQL * together with dynamic SQL) and forms-based program programming is so distinct that it allows you to jot down your personal courses in C. quite a few routines (with recommendations) are supplied to enhance the talents had to produce operational queries and courses. you will additionally study a few barriers of interactive SQL and the way to surmount those obstacles in courses. Logical database layout can also be defined extensive and utilized to the dialogue of integrity constraints.

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Java application is as follows. Number of documents matched: 0 Number of documents modified: 0 Upserted Document Id: 55d4e56c0bc271d4a7002749 _id 55d4e56cd292641a003cb55a catalogId catalog1 journal OracleMagazine publisher Oracle Publishing edition 11-12 2013 title Engineering as a Service author Kelly, David A. 31 Chapter 1 ■ Using a Java Client with MongoDB _id 55d4e56cd292641a003cb55b catalogId catalog2 journal OracleMagazine publisher Oracle Publishing edition November December 2013 title Quintessential and Collaborative author Tom Haunert _id 55d4e56c0bc271d4a7002749 catalogId catalog3 journal Oracle Magazine publisher Oracle Publishing edition November December 2013 title Engineering as a Service author David A.

Figure 2-13. Ending a Mongo Shell Session Using Collections In the following subsections we shall create a collection and subsequently drop a collection from the Mongo shell. Creating a Collection The create command is used to create a collection. We already discussed the create command to create a collection (see “Running a Command or Method in mongo Shell”). The show collections command may be used to list the collections in a database. >use test >show collections The collections in the database get listed as shown in Figure 2-14.

Drop() command to avoid the “collection already exists” error message, which is shown in Figure 2-7. ) Figure 2-7. 0/reference/method/. JavaScript methods may also be run using a JavaScript file. js in the directory C:\MongoDB from which the command is to be run. getCollectionNames()); 43 Chapter 2 ■ Using the Mongo Shell From the command line run the JavaScript file with the following command. js The JavaScript gets evaluated and the output gets generated, which is a listing of collection names for the example JavaScript as shown in Figure 2-8.

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