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Tags: des style blog tar width get1. Log in to PL/SQL DeveloperThis omits the installation steps for the Oracle database and PL/SQL developer, and note that when you install the PL/SQL developer software, do not install in the program Files (x86) directory, or PL/SQL will not start Developer.Wonder why the database TNS

1. Log in to PL/SQL DeveloperThis omits the installation steps for the Oracle database and PL/SQL Developer, and note that when you install the PL/SQL Developer software, do not install it under the program Files (x86) directory or you cannot start PL/SQL Developer.Wonder why the database TNS is not chosen here? I inst

The Oracle tutorial you are looking at is an introductory overview of Oracle Pl/sql. First, the purpose of pl/sql appearanceStructured Query Language (structured query Language, referred to as SQL) is used to access relational database a common language, which belongs to the fourth generation language (4GL), its performance is not a process, that is, do not specify the implementation of specific methods and

PL/SQL indicates the SQLProcedural Language extension(Procedural Language extension to SQL ). By adding the programming structure and sub-Program, PL/SQL to expand SQL. Realize that PL/SQL is not independentProgramming LanguageIs very important. PL/SQL is a part of Oracle RDBMS and can reside in two environments-clien

Tags: PL/SQL Exception handling methods 1: What is exception handling: PL/SQL provides a function to handle exceptions, called exception Handling in PL/SQL blocks, and exception handling we can test the code and avoid exception exits. PL/SQL exception information consists of three parts: 1: Exception type NBSP;

Introduction to PL/SQL Program Design ① PL/SQL program design overview PL/SQL is an advanced database programming language used to access Oracle databases in various environments. Since the language is integrated into the database server, PL/SQL code can process data quickly and efficiently. The following SQL statement

What is the Pl/sql program In the 4th chapter, the standardized SQL language is used to perform various operations on the database, and only one statement can be executed at a time, with a semicolon in English. To end the identity, this is inconvenient to use, and inefficient, because the Oracle database system is not like VB, VC, such as programming language, it focuses on the management of the background database, so the ability to provide a weak p

Tags: manipulating SQL data types Java class subclass properties variable Erro except defining variablesI. What is PL/SQL?PL/SQL (procedural language/structure Query Language) is an oracle extension to the standard SQL specification that fully supports SQL data operations, transaction control, and so on.Ii. the rules for the preparation of PL/SQL1. Naming rules f

The previous blog introduced how to use the Navicat tool to back up Oracle. This blog introduced how to use the PLSQLDeveloper tool to import and export Oracle databases. PLSQLDeveloper is one of the main tools used by Oracle databases to import and export databases. This article mainly introduces the process of using PLSQL to import and export Oracle databases. 1. Oracle count The previous blog introduced how to use the Navicat tool to back up Oracle. This blog introduced how to use the

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-dimensional arrays.PL/SQL table: a temporary index table object type consisting of multiple index columns and available columns. Similar

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 branch and no else clauseCollection_is_null ORA-06531-6531 set element (nested table or varray

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 many beginners feel difficult to understand. At first, more people think of it as just a sc

Abstract: In the PLSQL development process, the use of SQL and PLSQL can meet most of the requirements, but in some special circumstances, using standard SQL statements or DML statements in PLSQL cannot meet your needs. for example, dynamic table creation or an uncertain operation must be performed dynamically. This requires dynamic SQL. This article describes PLSQL in detail through several examples. Abstract: In the PL/SQL development process, SQL

Dynamic Content Summary: In the Pl/sql development process, the use of sql,pl/sql can achieve most of the requirements, but in some special cases, the use of standard SQL statements or DML statements in Pl/sql can not achieve their own needs, For example, the need to dynamically build a table or an indeterminate operation requires dynamic execution. This needs to

I. PL/SQL tableThe PL/SQL table has only two columns, where the first column is listed as an integer type and the second column is the user custom.Defined:TYPE is TABLE of Types of [Not NULL] INDEX by Binary_integer;The type of Property Method:. Count-Returns the total number of rows in a PL/SQL table. delect--Delete all the contents of the

Oracle----PL/SQLPL/SQL is a programming language that combines process language (procedural Language) with Structured Query Language (SQL)PL/SQL is unique to Oracle, and is an extension to the. Different database vendors have similar "dialects" that provide new features.Supports multiple data types, such as large objects and collection types, with control structures such as conditions and loopsCan be used t

Label:1. The infrastructure of a PL/SQL block DECLARE /* * Definition section--Define constants, variables, complex data types, cursors, user-defined exceptions */ BEGIN /* * Execute partial--PL/SQL statements and SQL statements */ EXCEPTION /* * Exception Handling section--handling run errors */ END; /* Block end tag */ 2. Using variables and constants1) Variable and constant A can be used in a

Basic PL/SQL settings 1. How to export table creation statements in batches? Select [Tools]-> [Export User Objects...] from the menu, and select the table to be exported in the window that appears. The SQL script exported in this way does not contain insert statements, that is, the data in the table is not exported at the same time, only DDL statements. 2. How to export initialization data? Select [Tools]-> [Export Tables...] from the menu, in the dis

1. PL/SQL developer remember the Login PasswordWhen PL/SQL developer is used, PL/SQL developer needs to remember the username and password for logging on to Oracle for ease of work; Setting Method: PL/SQL 7.1.2-> Tools-> preferences-> Oracle-> logon history. "store history" is selected by default. Check "store with p

1. PL/SQL developer remember the login password. When PL/SQL developer is used, PL/SQL developer wants to remember the login username and password for Oracle for ease of work. Setting method: PL/SQL developer 7.1.2-> Tools-> preferences-> Oracle-> logon history. The "store history" option is selected by default. Check