sql pl sql tutorial pdf

1. Character SetThe character set of PL/SQL includes: All uppercase and lowercase letters: include a~z and a~z. Number: Includes 0~9. Whitespace characters: include tabs, spaces, and carriage returns Other common English symbols 2. IdentifiersIdentifiers are used to define PL/SQL variables, co

PL/SQL processing exceptions are different from otherProgramLanguage error management method. The PL/SQL exception handling mechanism is very similar to Ada, and there is a full-Inclusion Method for handling errors. When an error occurs, the program unconditionally redirects to the exception handling section, which req

IT Ninja Turtles PL/SQL Developer tips and shortcuts, Ninja Turtles developer 1. SQL plus Window: File-> New-> Command Window. This is similar to the SQL plus client tool of oracle, but it is much easier to use than it. 2. Set the Keyword to Uppercase automatically: Tools-> Preferences-> Editor, and select Uppercase fo

'); ENDMy_output; / This will give full play to the value of overloading! 4 Packet status and ORA-04068 errorThe problem is that no one in any development package can avoid it.What's the status of the package?When a package has at least one constant or variable declared at the package level, the package has a state!When a session invokes a stateful package, the PGA stores all packet-level data in the package. Assuming that a state package is compiled again, all sessions that use the package wil

Packet status and ORA-04068 errorThis is a problem that no one in the development package can avoid.What's the status of the package?When a package has at least one constant or variable declared at the package level, the package has a state!When a session invokes a stateful package, the PGA stores all packet-level data in the package! If a state package is recompiled, all sessions that use the package will be thrown at the next call: ORA-04068 error.Because the package level data stored in the

The error message "pldeveloper" appears when PL/SQL Developer connects to a 64-bit database. Original Works are from the blog of "Deep Blue blog". You are welcome to reprint them. Please note the following source when reprinting them. Otherwise, you will be held legally liable for copyright. Deep Blue blog: http://blog.csdn.net/huangyanlong/article/details/41479997 After 64bit oracle11g database is installe

Document directory Record and PL/SQL tables Record and PL/SQL tables 1. What are record and PL/SQL tables?Record: a temporary record object type consisting of a single row and multiple columns of scalar type. Similar to multi-d

Problem? PL/SQL Developer client installation and configuration and handling of some problemsFirst, the problem analysiswhen using the PL/SQL Developer Client tool, be sure to look at the two-point knowledge that is different from SQL Server and MySQL client as it can be use

Multiple unrelated columns are combined to form a PL/SQL record type, which can be processed as a whole. In addition, PL/SQL record types can be performedNesting and defining Union arrays and nested tables based on PL/SQL records.

[connect] Disconnects from the database Edit Displays a text editor to edit the SQL Buffer Exec [ute] Procedure Executes the specified procedure Exit [application] Quits a running script or closes the command window. Adding the application parameter will also close PL/SQL developer. Get [filename] Loads a comman

PL/SQL provides three common set union arrays, nested tables, and variable-length arrays, PL/SQL provides corresponding functions or procedures for operation. Element or subscript in the vertical array. These functions or procedures are called set methods. A set method is a function or process built into the set and ca

Post from: http://www.oracle.com/global/cn/oramag/oracle/04-sep/o54plsql.html Control mythical codeAuthor: Steven Feuerstein Study and crack some myths in your code. "Do not use the XYZ feature; there was a problem in previous versions of N. N. "" To always use explicit pointers, this is the most effective way to extract a single row of data. " "To avoid using packages, they consume too much memory. " MeYou must have heard of these arguments, or either of them. They are just a few myths tha

PL/SQL exceptions The pre-defined exceptions and codes of PL/SQL are as follows:Exception Oracle error sqlcode Value MeaningAccess_into_null ORA-06530-6530 the referenced object is assigned directly to the object without InitializationCase_not_found ORA-06592-6592 if no case in the when clause contains no required bran

For beginners, Oracle's database language PL/SQL is always a bit strange. It is called a host language and, as its name suggests, it is dependent on something to survive, PL/SQL is attached to the Oracle database, and its runtime environment is the Oracle database. This is a little different from other languages, so m

Oracle|sql language []oracle pl/sql Language Foundation Oracle Pl/sql Language Basics Pl/sql is Oracle's extension of the standard database language, Oracle has integrated

typeSyntax:Identifier [constant] datatype [not null] [: = | default expr]Identifier: Specifies the variable or constant name.Constant: a constant.Datatype: used to specify the type of a variable or constantNot NULL: non-null. It must be initialized.:=: The value assignment matchesDefault: Default ValueExpr: Initial Value 1.3. scalar definition rulesDeclare a variable per lineVariable Value assignment: identifier: = value;Variable names can contain up to 30 characters 1.4 Use the % Type attribut

Oracle 11g PL/SQL function result cache, oracle11g Two experiments have been conducted to simulate the Oracle Performance Diagnosis art. The book says that if you don't need RELIES_ON, then the changes to the objects on which the function depends will not result in the invalid result cache operation (result_cache RELIES_ON (test1, test2). The test proves that this operation is incorrect. The function f1 ()

PL/SQL-related data dictionary and plsql-related dictionary Data Dictionary related to PL/SQLHttp://www.oracle.com/technetwork/issue-archive/2012/12-nov/o62plsql-1851968.html Sometimes, we encounter the following problems during PL/SQL development:1) What database objects d

This example describes Oracle's pl/sql. Share to everyone for your reference, specific as follows: First, what is Pl/sql? Pl/sql (procedural language/sql) is an extension of Oracle's

The PL/SQL cursor allows the program to select multiple rows of data from the database, and then separately process each row of data, it provides Oracle with a method to indicate and control each stage of SQL processing. I think you have some knowledge about PL/SQL. Through