How do you declare a variable of a table in PL SQL?

Declare TABLE TYPE variables in a PL/SQL declare block. Table variables are also known as index-by table or array. The table variable contains one column which must be a scalar or record datatype plus a primary key of type BINARY_INTEGER.

How do you declare a variable in cursor type?

To create a cursor variable, either declare a variable of the predefined type SYS_REFCURSOR or define a REF CURSOR type and then declare a variable of that type. You cannot use a cursor variable in a cursor FOR LOOP statement. You cannot declare a cursor variable in a package specification.

Is cursor PL SQL variable?

Cursor variables are available to every PL/SQL client. For example, you can declare a cursor variable in a PL/SQL host environment such as an OCI or Pro*C program, then pass it as a bind variable to PL/SQL. Application development tools that have a PL/SQL engine can use cursor variables entirely on the client side.

How do I declare a Rowtype variable in PL SQL?

Declaring variables as the type table_name %ROWTYPE is a convenient way to transfer data between database tables and PL/SQL. You create a single variable rather than a separate variable for each column. You do not need to know the name of every column.

What is %type in PL SQL?

The %TYPE attribute lets use the datatype of a field, record, nested table, database column, or variable in your own declarations, rather than hardcoding the type names. You can use the %TYPE attribute as a datatype specifier when declaring constants, variables, fields, and parameters.

What is reference cursor in PL SQL?

A REF CURSOR is a PL/SQL data type whose value is the memory address of a query work area on the database. In essence, a REF CURSOR is a pointer or a handle to a result set on the database.

Why ref cursor is used in PL SQL?

Using REF CURSOR s is one of the most powerful, flexible, and scalable ways to return query results from an Oracle Database to a client application. A REF CURSOR is a PL/SQL data type whose value is the memory address of a query work area on the database.

Why do we use %Rowtype and %type in PL SQL?

%TYPE : Used to declare a field with the same type as that of a specified table’s column. %ROWTYPE: Used to declare a record with the same types as found in the specified table, view or cursor (= multiple columns).

How do you declare a cursor variable in PL SQL?

With a cursor variable, you simply pass the reference to that cursor. To declare a cursor variable, you use the REF CURSOR is the data type. PL/SQL has two forms of REF CURSOR typeS: strong typed and weak typed REF CURSOR.

What are REF CURSOR types in PL/SQL?

PL/SQL has two forms of REF CURSOR typeS: strong typed and weak typed REF CURSOR. The following shows an example of a strong REF CURSOR. DECLARE TYPE customer_t IS REF CURSOR RETURN customers%ROWTYPE; c_customer customer_t;

What is the syntax for a cursor without parameters in Oracle/PLSQL?

The syntax for a cursor without parameters in Oracle/PLSQL is: For example, you could define a cursor called c1 as below. The result set of this cursor is all course_numbers whose course_name matches the variable called name_in. Below is a function that uses this cursor. As we get more complicated, we can declare cursors with parameters.

How do you create a cursor variable in C++?

To create cursor variables, you define a REF CURSOR type, then declare cursor variables of that type. Cursor variables are like C or Pascal pointers, which hold the address of some item instead of the item itself. Declaring a cursor variable creates a pointer, not an item.