ORACLE 11G COMPLETE REFERENCE BOOK PDF
11g: The Complete Reference His best-selling books include Oracle Database 11g DBA Scott has been a technical editor for nine Oracle Press books. , he is the primary author of 15 books for Oracle DBAs and Oracle Database 10g: The Complete Reference is the first entity that has gathered all the . Oracle Database PL/SQL Language Reference, 11g Release 1 (). B Copyright © , , Oracle and/or its affiliates.
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Oracle Database Reference, 11g Release 2 (). E Copyright © , , Oracle and/or its affiliates. All rights reserved. Primary Author: Bert Rich. tive Guide. Oracle Books. Resource Center dovolena-na-lodi.info is a complete catalog of O'Reilly's books Oracle Essentials: Oracle Database 11g, Fourth Edition. Oracle Essentials, Fourth Edition Oracle Database 11g Oracle Database 11g, A Beginner's Guide Oracle Database 11g The Complete Reference.
If there are fewer matches, NULL is returned. Do not confuse this parameter with backreferences. Oracle does not provide a function to return the part of the string matched by a capturing group. The last three parameters are optional. If no matches can be found, the original string is replaced. If you specify a positive number for occurrence see the above paragraph only that match is replaced. If you specify zero or omit the parameter, all matches are replaced.
The replacement parameter is a string that each regex match will be replaced with. You can reference the same group more than once.
There's no replacement text token to re-insert the whole regex match. Backslashes only need to be escaped if they're followed by a digit or another backslash. Set it to one to get the position of the first character after the match.
The first character in the string has position 1. The last 4 parameters are optional.
It returns zero if the regex finds no matches at all. This function is only available in Oracle 11g and later. If you omit this parameter or pass an empty string, the default matching modes are used. By default, the dot matches any character except newlines. By default, these only match at the very start and the very end of the string.
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Further Reading O'Reilly's book Oracle Regular Expressions Pocket Reference is a very handy page volume that tells you everything you need to know about regular expressions in Oracle Database 10g. Despite the book's cover, it actually contains both a tutorial and a reference. Since Oracle's regular expression support is fairly limited, this small book is all you need to successfully use regular expressions with Oracle.
This makes your string complicated, especially if you have SQL statements as strings. You can specify any character that is not present in the string as a delimiter.
The slide shows how to use the q' notation to specify the delimiter. The example uses! You start the string with q' if you want to use a delimiter.
The character following the notation is the delimiter used.
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Enter your string after specifying the delimiter, close the delimiter, and close the notation with a single quotation mark. Scalar data types: Scalar data types hold a single value.
The value depends on the data type of the variable. Reference data types: Reference data types hold values, called pointers, which point to a storage location. LOB data types: LOB data types hold values, called locators, which specify the location of large objects such as graphic images that are stored outside the table. You learn about host variables later in this lesson.
Atlanta The image represents a BLOB. Use meaningful identifiers for variables.
The key is to apply your naming convention consistently for easier identification. Use meaningful and appropriate identifiers for variables. A constant must be initialized in its declaration; otherwise, you get a compilation error. After initializing a constant, you cannot change its value. If you do not assign an initial value, the new variable contains NULL by default until you assign a value.
However, it is good programming practice to initialize all variables.
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Two objects can have the same name only if they are defined in different blocks. Where they coexist, you can qualify them with labels and use them. Avoid using column names as identifiers. Although the code example in the slide works, code that is written using the same name for a database table and a variable is not easy to read or maintain.
For instance, you can choose from integer, floating point, character, Boolean, date, collection, and LOB types. A scalar data type holds a single value and has no internal components.
Examples in Each Chapter
Scalar data types can be classified into four categories: number, character, date, and Boolean. Character and number data types have subtypes that associate a base type to a constraint.
If you do not specify a maximum length, the default length is set to 1. Base type for variable-length character data up to 32, bytes.
Number having precision p and scale s. The precision p can range from 1 through The scale s can range from 84 through It requires 5 bytes to store the value. Represents floating-point number in IEEE format.The key is to apply your naming convention consistently for easier identification.
Data in a datafile is read, as needed, during normal database operation and stored in the memory cache of Oracle Database. However, it is good programming practice to initialize all variables. Set it to one to get the position of the first character after the match.
That's all in this list of Free SQL books for beginners and experienced developers. Physical and logical structures[ edit ] An Oracle database system—identified by an alphanumeric system identifier or SID  —comprises at least one instance of the application, along with data storage.