By Lex deHaan
SQL is the ANSI-standard language for getting access to and manipulating relational databases. somebody (programmers, directors, or designers) who paintings with a relational databases have to comprehend the SQL language. whereas so much books out there don't correctly disguise the fundamentals, this e-book differs: it explains basics intimately, supported through lifelike examples.You will achieve complete competence to outline, entry, and control facts in an Oracle database.This booklet is a good device that you can write potent SQL for the Oracle database. The textual content is absolutely compliant with the newest model of the ANSI SQL usual, and entirely replace for the Oracle 10g database. This e-book is a translation of renowned Netherlands collage textual content (currently in its 3rd edition). writer Lex de Haan is very skilled with the Oracle database, and has twenty-five years of training adventure. de Haan can be a member of the ANSI/ISO SQL standardization nationwide physique.
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SQL is the ANSI-standard language for gaining access to and manipulating relational databases. somebody (programmers, directors, or designers) who paintings with a relational databases have to comprehend the SQL language. whereas so much books out there don't correctly hide the fundamentals, this e-book differs: it explains basics intimately, supported by way of reasonable examples.
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Extra info for Mastering Oracle SQL and SQL*Plus
Table Descriptions Tables 1-1 through 1-7 describe the structures of the case tables. Table 1-1. The EMPLOYEES Table Column Description Key EMPNO Number, unique for every employee PK ENAME Last name INIT Initials (without punctuation) JOB Job description of the employee MGR The employee number of the employee’s manager BDATE Date of birth MSAL Monthly salary (excluding bonus or commission) COMM Commission component of the yearly salary (only relevant for sales reps) DEPTNO The number of the department for which the employee works FK FK Table 1-2.
11. Distribution Independence: Application programs remain logically unimpaired when data distribution is first introduced or when data is redistributed. 12. The Nonsubversion Rule: If a relational system also supports a low-level language, that low-level language cannot be used to subvert or bypass the integrity rules and constraints expressed in the higher-level language. Rule 5 refers to transactions. Without going into too much detail here, a transaction is defined as a number of changes that should be treated by the DBMS as a single unit of work; a transaction should always succeed or fail completely.
You can invoke the external editor only when your SQL buffer is not empty. ” Invoking the external editor starts a subprocess, which means that you cannot return to SQL*Plus until you have closed the external editor window. Alternatively, you may want to start a separate editor session from the operating system (that is, not from SQL*Plus) so you can switch between two windows. In that case, you must make sure to save the changes in your editor window before executing the changed SQL command in SQL*Plus.
Mastering Oracle SQL and SQL*Plus by Lex deHaan