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There are a several ways of declaring variables in SQL*Plus scripts. The first is to use VAR, to declare a bind variable. The mechanism for assigning values to a VAR is with an EXEC call: SQL> var name varchar2(20) SQL> exec :name := 'SALES' PL/SQL procedure successfully completed.
In SQL Server we can use this: DECLARE @variable INT; SELECT @variable= mycolumn from myTable; How can I do the same in Oracle? I'm currently attempting the following: DECLARE COMPID VARCHAR2(20);
5 lip 2011 · In ORACLE SQL Developer 20.2.0.175, we can Run Script (F5): DEFINE usr = 'YourName'; SELECT * FROM Department WHERE created_by = '&usr';
This Oracle tutorial explains how to declare variables in Oracle / PLSQL with syntax and examples. In Oracle / PLSQL, a variable allows a programmer to store data temporarily during the execution of code.
You can define variables, called substitution variables, for repeated use in a single script by using the SQL*Plus DEFINE command. Note that you can also define substitution variables to use in titles and to save your keystrokes (by defining a long string as the value for a variable with a short name).
You must define object types using the SQL statement CREATE TYPE, in SQL*Plus or other similar programs. After an object type is defined and installed in the schema, you can use it in any PL/SQL block, subprogram, or package. In PL/SQL, you then declare a variable whose data type is the user-defined type or ADT that you just defined.
After completing this lesson, you should be able to do the following:• Recognize valid and invalid identifiers• List the uses of variables• Declare and initialize variables• List and describe various data types• Identify the benefits of using the %TYPE attribute• Declare, use, and print bind variables.
