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Four simple guidelines to improve the number and quality of Pl/sql code I've been writing Pl/sql code since 1990. That means I've written tens of thousands of of lines of software code, but I'm sure most of the code is very clumsy and difficult to maintain. Luckily, I find it's not too late to find and follow a new way to write better code. It was last year that I had a significant improvement in the qual

1. Definition Exception: The identifier produced during the execution of the Pl/sql, and a warning or error in Pl/sql is called an exception. Errors usually fall into two categories: Compile-time errors-typically syntax errors, found by the Pl/sql engine and reported to the user, and the program itself cannot handle because it is not yet running. Run-time Err

Process Pl/sql is a mainstream application programming language based on Oracle, which is characterized by a combination of SQL statements and procedural development languages to achieve more complex business logic. This article mainly discusses the multiple process communication.Obviously, multi-process technology is used to improve the concurrency of the application, and thus improve the execution efficiency of the whole system, so how to implement

Tags: string IDT associative logical operators loop if-then while loop sequence basicsOne, operatorThe PL/SQL language has rich built-in operators that provide the following types of operators:. Arithmetic operators. Relational operators. Comparison operators. Logical operators. String operators Second, operator precedence arithmetic operator operator operator * exponential operation

: exec Pro2 (111); exercise: Create a stored procedure that shows the employee's salary and the average salary of the department created or replace procedure Pro1 (V_in_empno in Number, v_out_mysal out number, v_out_avgsal out number) is the begin select Sal to v_out_mysal from EMP where EMP no=v_in_empno; select AVG (SAL) into V_out_avgsal from EMP where deptno= (select Deptno from emp where empno= V_IN_EMPNO); End; Call execution: Declare v_mysal number; v_avgsal number; begin Pro1 (7902, v_

One: PL/SQL program blockPL/SQL is a block-structured language, and a PL/SQL program is a code logic block.The PL/SQL program consists of three components: 1 Declarations SectionStarting with the keyword DECLARE , it is an optional part that declares all variables, cursors, subroutines, and other elements that are used in the program with the a

Tags: Record rowtype database query name EDR result proc SeleI. PL/SQL (Procedure Language/sql) programming language1. ConceptPL/SQL is an extension of the Oracle database to the statement. In the use of ordinary SQL statements to add the characteristics of the programming language, so PL-SQL to the data Operations and query statements organized in the PL/SQL cod

Tags: div list direct. com PNG restart path instance articleThe Oracle database is not installed locally, but you want to use PL/SQL to connect to the server-side database. 1. Create a new network folder, under which you create a new admin folder under which to create a new Tnsnames.ora file (copy the contents of the following file as modified according to your database IP Port instance name) Modify files under the Network\admin folder: Database IP an

Label:First, the advanced level of PL/SQL-control structureIn any computer language (c,java,pascal) there are various control statements (conditional statements, loop structures, sequential control structures ...), and there are also such control structures in PL/SQL.After the completion of this part of the study, I hope you reach:1. Use various IF statements2. Using Loop statements3. Use control statements

Tags: how to set PL/SQL date display format, PL/SQL date displayJoke: In entering the company for a period of time, will always meet a variety of small problems, but finally still "looking for Niang, ask Google" solutionThe decision. But recently the company introduced a few new recruits, small problems a bunch of, PL/SQL connection not on the database, how to pa

 Pl-sql TriggerTriggers are a technique that is provided by many relational database systems. In Oracle systems, trigger-like procedures and functions have a PL/SQL block that declares, executes, and processes exceptions.① Trigger TypeTriggers are stored as separate objects in the database, unlike stored procedures, where stored procedures start or run directly through other programs, and triggers are run

For the traditional large-scale software products using relational database, the continuous development and maintenance of the background database can produce a large number of script files, how to make versioning more convenient for these script files, and how to quickly manage the permissions between the teams. The level of integration between the different database products and the corresponding client management tools and different product version management tools may be subject to different

Tags: style blog http io strong for file Data 2014Export/import icons are grayed out:Cause: The associated application is not associatedMenu Bar-- T-ools--Import Tables ...--Oracle ImportExport Executable : %oracle_home%\bin\imp.exe Output file:c:\documents and settings\administrator\ desktop \eam.dmpPL/SQL Developer is the primary tool for importing or exporting databases in an Oracle database , and this article mainly describes the process of importing and exporting databases with

Label:A few days ago because of a oracle32bit client + PL/SQL connection not Oracle was the leader despise, asked me to use PL/SQL No, I installed the open PL/SQL login interface is not the same as his, there is no connection for normal, sysdba options , also asked why I have PL/SQL also installed Oracle client, at tha

Pl/SQL 9.2 cannot connect to the oracle database. When oracle 11 GB is installed on the system and oracle 10 Gb is installed on the client, when pl/SQL is used to connect to the database, the connection fails. The reason is that the oracle home directory specified by pl/SQL is the default 10 Gb directory. Therefore, you need to modify the oracle home Directory va

To put it a little bit, plsqldeveloper needs to install the local oracle client to connect to remote oracle before using the client configuration. Because the client is very busy To put it a little bit, pl/SQL developer needs to install the local oracle client to connect to remote oracle before using the client configuration. Because the client is very busy To put it a little bit, pl/SQL developer need

PL/SQL 9.2 cannot connect to the Oracle database. When the system is installed with Oacle 11 GB and the client is installed with Oacle 10 Gb, when pl/SQL is used to connect to the database, the connection fails. The reason is that the oracle home directory specified by pl/SQL is the default 10 Gb directory. Therefore, you need to modify the oracle home Directory

Boolean is a type of PL/SQL data. Logical values are true and false. Only logical operators can be applied to boolean variables. The Database SQL type does not support BooleanType. Only PL/SQL is supported. Therefore, you cannot insert or retrieve boolean values in the database. The following describes the Declaration and value assignment of the Boolean Type and how to output the boolean type. 1. boolean d

Solution for PL/SQL Developer in Windows 8 64-bit + Oracle 12c 64-bit, window812c1) install Oracle 12c 64-bit2) install a 32-bit Oracle client (instantclient-basic-nt-12.1.0.1.0.zip)Download instantclient-basic-win32-11.2.0.1.0.zip, must be win32 version, Oracle official website has download, unzip it to the Oracle Installation Directory of the Product: D: \ oracle \ product \ instantclient_12_1.Copy the NETWORK \ ADMIN \ tnsnames. ora file to the Dir

1. Cursor Concept A swimming cursor is a handle or pointer to a context area. When you perform a crud operation in a pl/sql block, Oracle assigns the context area to it in memory. Using the database language to describe a cursor is a position entity that maps on a row of data in the context area result set. A user can use a cursor to access any row of data in the result set, and the row data is manipulated after the cursor is pointed to a row. Curs