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 Exception error HandlingA good program should be able to properly handle all kinds of error situations and recover from them as much as possible. ORACLE provides exception conditions (EXCEPTION) and exception handling (EXCEPTION HANDLER) for error handling① has three types of exception errors:1. Pre-defined (predefined) errorsThere are approximately 24 pre-defined exception cases for Oracle. The handling of this exception does not have to be defined in the program and is automatically raised

One, the packageA package is a combination of a set of related procedures, functions, constants, variables, cursors, exceptions, and other PL/SQL programming elements. It is similar to classes in C + + and Java where variables are equivalent to member variables in a class, and procedures and functions are equivalent to methods in a class. By using packages, developers can use the object-oriented approach to develop stored procedures to improve the per

Oracle developer estimates are very familiar with PL/SQL developer, and there are some small function points that some beginners have not found. PL/SQL Developer supports multi-connection multiple windows, as detailed below. Concept of the primary connectionOpen PL/SQL developer the login interface, the database connection after successful login is the primar

Due to the continuous updating of hardware technology, Win7 system gradually become mainstream, and computer memory gradually increased, in order to make full use of memory resources (because 32 of the system can only use up to 3G of memory), improve system performance, many people began to use the Win7 (64Bit) system. A 64-bit Oracle database is installed on a 64-bit system, but there is no corresponding 64-bit PL/SQL Developer, and it is not possibl

Label:Free installation of Oracle clients using PL/SQLThe Oracle client is annoying, and deploying a connection to it usually requires the client to install it, and the installer requires the registry to be written on the target machine, assuming you're not a neat freak, you could still be stuck with something like this: when other programs on your machine rely on x64 's Oracle program, And they're probably not written by you at all, so you don't have

Tags: style blog http color io using Java ar StrongSometimes we need to do some slightly more complex operations on the data in the database, and these operations are all one-time and are no longer used after they are exhausted.It is too cumbersome and wasteful to use stored procedures, and to be deleted when it is exhausted. and a single SQL cannot meet the requirements. This is the time to use the SQL statement block.If you are using an Oracle database, you can use

Tags: basic syntax structure PL/SQL1. Branching structureIn PL/SQL, the IF keyword is used as the starting segment of the program for the point structure.There are several branching structures in general:1) If Condition then statement end if;2) If Condition then statementElse then statementEnd If;3) If Condition then statementelsif condition Then statement...Else then statementEnd If;The structure correspon

Tags: Connection query sequence developer save set bound goto RowType View\ t 1th Introduction to PL/SQL development1th Oracle 11g Database System1.1 Introduction of relational database system1.1.1 What is a relational data model1.1.2 Database System Paradigm1.1.3-relational database management system1.1.4 using SQL statements to communicate with database management systems1.2 Initial knowledge of Oracle 11g1.2.1 Oracle 11g Introduction1.2.2 Oracle 11

1. stored Procedures, functions, and triggers are all written in plsql. the process, function, and trigger are in the Oracle database. plsql is a very powerful database process Language 4. stored Procedures and functions can be used to call more Oracle Data in Java. video tutorial: 2.taobao.comitem.htm? Id42922011874spm686.1000925.0 1. stored Procedures, functions, and triggers are written in pl/SQL. procedures, functions, and triggers are 3.

Special Copy in PL/SQL DEVELOPER) -- Excerpt from PL/SQL syntax 6.0 Chinese PDF help manual If you are using PL/SQL Developer to write SQL and PL/SQL code, then you need to use code in other tools, such as programming languages such as 3GL, you may need to convert the code to a slightly different format. Let's assume t

PL/SQL Exception error handling and plsql error handlingZookeeper Exception HandlingA good program should be able to correctly handle all kinds of errors and recover from errors as much as possible. ORACLE provides EXCEPTION and exception handler for error handling. ① There are three types of exception errors:1. Predefined ErrorThere are about 24 predefined ORACLE exceptions. To handle this exception, you do not need to define it in the program. ORACL

How to view the package or table structure reports ora-01460 in PL/SQL developer today someone reported that a database cannot view the package or table structure in PL/SQL developer. The character set of the server and client is inconsistent.Check that the character set of the database is zhs32gb18030.Select * from V $ nls_parameters t where T. Parameter like '% characterset % ';Parameter ValueNls_charact

Oracle is a large database with a C/SClient/Server structure. It is mainly used in the 4GLSQL language and has the advantages of being powerful, simple, and easy to learn. The working process of the C/S structure is: when the client c end) inputs and sends an SQL statement, it will be sent to the server S end through the network ), the result is analyzed and executed, and then returned to the client through the network. At this time, the client can send an SQL statement. It can be seen that the

Oracle Database: PL/SQL cursor overview, oracleplI. cursor Concept Literally, it refers to a swimming cursor, which is a handle or pointer pointing to the context area. When performing the CRUD operation in the PL/SQL block, ORACLE allocates a context zone for it in the memory. The database language used to describe the cursor is the location entity mapped to a row of data in the context result set. You can

Tags: Nextval SQL statement throws exception handling implicitly no i+1 func has a1. Database design: For user-specific needs, then we create a most practical and high performance database! Steps for database design: 01. Demand Analysis 02. Conceptual Structure Design 03. Logical Structure Design 04. Physical Organization Design 05. Implementation of the database 06. Operation and maintenance of the database 3 major paradigms of the database: 1. Ensure the atomicity of each column! Each column i

Label:To quickly use PL/SQL developer for Oracle database-related development, summarize some of the more frequently used tips below, from the network and your own tests 1. Switch schema --switch SchemaAlter session set current_schema= PO; --get Current Context informationSelectSys_context ('USERENV','Current_User') Current_User, Sys_context ('USERENV','Current_schema') Current_schema fromDual 2. PL/SQL

Note:The tables used in the following test cases are derived from the Scott scenario, before use, make sure that the user is unlocked.1. IntroductionAs with most programming languages, when you write a PL/SQL program, you can define constants and variables that are included in the PL/SQL program:A, scalar type (scalar)B, composite type (Composite)C, reference type (Refrence)D, LOB (large object) typeHere is

Label:Variables and data types can be defined in a PL/SQL block, which makes the PL/SQL block more flexible with data processing. The definition of variables and types is placed in the variable Declarations section of the PL/SQL block. Definition and use of variables There are two types of definitions for variables, namely:Variable name TYPE [constraint][default

 Exception error HandlingA good program should be able to properly handle all kinds of error situations and recover from them as much as possible. ORACLE provides exception conditions (EXCEPTION) and exception handling (EXCEPTION HANDLER) for error handling① has three types of exception errors:1. Pre-defined (predefined) errorsOracle has a pre-defined exception condition of about 24. The handling of such abnormal conditions. It does not need to be defined in the program and is initiated by Ora

Win8 x64 PL /SQL Enter user name password, connect times wrong:650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/6E/22/wKioL1V1B3jz5PutAAFWFtrv114122.jpg "title=" 10.png "alt=" Wkiol1v1b3jz5putaafwftrv114122.jpg "/>Environment:1.win 8 64bit as a client, install the client650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/6E/26/wKiom1V1BeiTYDtoAAA2FjZX5OE301.jpg "title=" 11.png "alt=" Wkiom1v1beitydtoaaa2fjzx5oe301.jpg "/>Unzip, instal