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#Oracle sql developer declare variable how to
#Oracle sql developer declare variable code

Declaration of variables is a process of assigning the name to the placeholder and associate the same with a valid datatype.

Variables in PL/SQL are basic identifiers assigned to a storage area that a program can manipulate.

To avoid confusion and to increase the readability of such program, we need to follow certain naming conventions.

In a complex program, sometimes we may have to include many identifiers.

Identifiers in PL/SQL are nothing but names given to a PL/SQL object.

#Oracle sql developer declare variable code

When the above code is executed, you will get the following output.

Code line 6: Printing the stored value of variable ‘lv_name’.

Code line 5: Value for variable ‘lv_name’ has been assigned from the variable ‘lv_name_2’.

Code line 3: Declaring the variable ‘lv_name_2’ of VARCHAR2 with size 50 and assigned the default value using literal ‘GURU99’.

Code line 2: Declaring the variable ‘lv_name’ of VARCHAR2 with size 50.

We are going to print ‘GURU99’ in the following program by using the variables.

#Oracle sql developer declare variable how to

The above syntax shows how to assign the value to an already declared variable.Įxample1: In this example, we are going to learn how to declare the variable and how to assign the value to them. We can make the use of the SET statement in SQL to assign the values to the variable irrespective of whether the variable has an initial value or previous value assigned to. The above syntax shows how to declare the variable and assign value in the declarative section. We can assign the values to the variables declared in SQL with the help of two methods that are given below: 1.

Once a particular value has been assigned, it will be stored in the allocated memory space for that variable. so it is better to modify the variables in the below PL/SQL block section and click on the OK. The value can be either a literal or another variable’s value. Open SQL Developer and connect to the Oracle Database. The values of these variables can be assigned either in execution section or at the time of declaring itself.

Once the variable is declared, they are ready to hold the data of defined type. The above syntax shows how to declare the variable in the declarative section. This declaration needs to be done in the declarative section of the PL/SQL Blocks.ĭeclaration of variables is a process of assigning the name to the placeholder and associate the same with a valid datatype. They need to be declared before using them inside the program. Variables are mainly used to store data during the data manipulation or data processing. Datatypes define the storage and processing methods for these variables. These variables need to be associated with some valid PL/SQL datatypes before using them. Variables are nothing but placeholders where the user can store values. Variables in PL/SQL are basic identifiers assigned to a storage area that a program can manipulate.