triggers in pl sql

PL/SQL1. Procedures, functions, and triggers are written in PL/SQL2, procedures, functions, triggers are stored in the Oracle database3. PL/SQL is a very powerful process language4, procedures, functions,

From:http://www.cnblogs.com/kissdodog/p/3173421.htmlTriggers can do a lot of things, but it also brings a lot of problems. The trick to using it is to use it at the right time, rather than using it at an inappropriate time.Some common uses for triggers are as follows: Elastic referential integrity: Implements operations that many DRI cannot implement (for example, referential integrity across databases or servers, and many complex relationshi

the C # language is Microsoft's product, it is stored in the "Connection pool" when connecting to Oracle, so it slows down for the first time, but when your Web program is not back up, the speed will not be slow. Iv. Disadvantages of using Pl/sql Bad portability (no use for database Exchange) Five, Pl/sql understan

In general PL/SQL programming, SQL can be used directly in DML and transaction-controlled statements, but DDL statements and system control statements cannot be used directly in PL/SQL, and it is possible to implement DDL statements and system control statements in

clause in the Exception Handling Section to obtain related Oracle errors. Example:UNDEF v_salDeclareV_ename EMP. ename % type;BeginSelect ename into v_ename from EMP where sal = v_sal;Dbms_output.put_line ('employee name: '| v_ename );ExceptionWhen no_data_found thenDbms_output.put_line ('employee not found: '| v_sal |' employee ');When others thenDbms_output.put_line ('error code: '| sqlcode );Dbms_output.put_line (sqlerrm );End; 2. raise_application_errorThis process is used to customize er

# language is Microsoft's product, it is connected to the Oracle when the "connection pool", so the first time will be slow, but when your Web application does not restart, the future speed will not be slow. Iv. disadvantages of using PL/SQLTransplant is not good (Exchange database is not used) V. PL/SQL Understanding1), stored procedures, functions,

Label:Source: Use SQL statements to find stored procedures, triggers, functions, etc. that contain a keyword (MS SQL SERVER only)The first approach: querying using system tables--replace text with the one you want to find. Select name from sysobjects o, syscomments s where o.id = S.id and the text like '%text% ' and O.xtype= ' P ' xtype: Object type. Can be one o

Many Oracle database developers prefer PL/SQL functions, storage, and so on to simplify the code. Recommended reading: Use PL/SQL to execute java storage to obtain the MAC address For example: Select empno, ENAME, DNAME, loc from emp, dept where emp. DEPTNO = DEPT. DEPTNO; Developers may think that such an

Label:http://uule.iteye.com/blog/2061773 (source) Bulk Import Script : Open a Command Window > enter @ > It will let you select the file you want to import (you need to know the order of the imported files, Plsql will not automatically recognize this or write a script like LS) such as: @d:\svn\1.5 database Script \oracle\import2.sql http://blog.csdn.net/hbhgjiangkun/article/details/8208565 1, PL/

In general PL/SQL programming, SQL can be directly used in DML and transaction control statements, but DDL statements and system control statements cannot be directly used in PL/SQL, to use DDL statements and system control statements in

Many oracle database developers prefer PLSQL functions and storage to simplify the code. Many oracle database developers prefer PL/SQL functions, storage, and so on to simplify the code. Many Oracle database developers prefer PL/SQL functions, storage, and so on to simplify the code. Recommended reading: Use

In the process of operation, it is sometimes necessary to send the data result set of SQL query in HTML form, so it is necessary to stitch the result set of SQL query into HTML code. There are usually two different ways to do this. One is to use the cron job directly to poll and do it using the OS level mail program. Its query result set can be directly under Sql

Pl/sql is Oracle's extension of the standard database language, Oracle has integrated PL/SQL into Oracle servers and other tools, and more developers and DBAs have started using Pl/sql in recent years, and this article covers

What is PL/SQL?• PL/SQL is a programming language developed by Oracle and dedicated to Oracle • PL stands for procedurallanguage • SQL stands for structuredquery language • PL/

Tags: Network A large number of T-SQL Analysis database requires mechanisms exist to saveOne, stored proceduresA stored procedure is a set of T-SQL statements that are compiled in a single execution planStored procedures: Like functions are saved in the database (programmability)Advantages of stored procedures:1. Allow modular programming2. Allow for faster execution if an operation requires a large number

The ORACLE tutorial is as follows: Oracle PL/SQL getting started. I. Objective of PL/SQL Structured Query Language (SQL) is a common Language used to access relational databases. It is a fourth-generation Language (4GL) and its execution features are non-procedural, that is,

first_name column is changed (for example, if the table is changed, the current type of first_name is changed to VARCHAR2 (25 ))? All PL/SQL code that uses this column must be modified. If you have a lot of PL/SQL code, such processing may be time-consuming and error-prone. In this case, you can use the "% TYPE" attri

manipulation language and query statements to be included in the Block structure (block_structured) and the code process language, making PL/C a powerful transactional language. In Oracle database management, PL/SQL is a procedural language extension to Structured Query Language (SQL). The purpose of

The ORACLE tutorial is as follows: Oracle PL/SQL getting started. I. Objective of PL/SQLStructured Query Language (SQL) is a common Language used to access relational databases. It is a fourth-generation Language (4GL) and its execution features are non-procedural, that is, you do not need to specify the specific metho

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