Can we pass parameters to cursor in Oracle?
An explicit cursor may accept a list of parameters. Each time you open the cursor, you can pass different arguments to the cursor, which results in different result sets. The cursor parameters cannot be referenced outside of the cursor query.
What is parameter cursor?
Parameterized cursors are static cursors that can accept passed-in parameter values when they are opened. The cursor displays the name and salary of each employee in the EMP table whose salary is less than that specified by a passed-in parameter value.
Can we pass cursor as parameter?
No, you can’t pass a static cursor as a parameter.
Why do we need to add parameters in cursors?
A parameter makes the cursor more reusable. Instead of hardcoding a value into the WHERE clause of a query to select particular information, you can use a parameter and then pass different values to the WHERE clause each time a cursor is opened. A parameter avoids scoping problems.
Can you pass a parameter to a cursor Mcq?
Parameters can be passed to a cursor variable.
What is correct syntax of parameterized cursor?
PL/SQL Parameterized cursor pass the parameters into a cursor and use them in to query. PL/SQL Parameterized cursor define only datatype of parameter and not need to define it’s length. Default values is assigned to the Cursor parameters. and scope of the parameters are locally.
What are cursor attributes in Oracle?
Every explicit cursor and cursor variable has four attributes: %FOUND , %ISOPEN %NOTFOUND , and %ROWCOUNT . When appended to the cursor or cursor variable, these attributes return useful information about the execution of a data manipulation statement.
What is ref cursor in Oracle?
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. REF CURSOR s are represented through the OracleRefCursor ODP.NET class.
What is the difference between cursor and ref cursor?
A cursor is really any SQL statement that runs DML (select, insert, update, delete) on your database. A ref cursor is a pointer to a result set. This is normally used to open a query on the database server, then leave it up to the client to fetch the result it needs.
How many attributes does every explicit cursor and cursor variable have?
four attributes
Every explicit cursor and cursor variable has four attributes: %FOUND , %ISOPEN %NOTFOUND , and %ROWCOUNT . When appended to the cursor or cursor variable, these attributes return useful information about the execution of a data manipulation statement. For more information, see “Using Cursor Expressions”.
What does %found attribute indicate?
What does %FOUND attribute indicate? It indicates that the cursor was found.
What are the three parameter modes for procedures?
The three parameter modes, IN (the default), OUT , and IN OUT , can be used with any subprogram. However, avoid using the OUT and IN OUT modes with functions. The purpose of a function is to take no arguments and return a single value.
What is an open cursor in Oracle?
Open cursor is for opening the cursor. Cursor is the one which you have declared with a sql query to it. Client connections are the ones like toad, sql*plus, plsql developer etc tool which connect to the oracle database server.
What is a PL SQL cursor?
PL/SQL – Cursors. A cursor is a pointer to this context area. PL/SQL controls the context area through a cursor. A cursor holds the rows (one or more) returned by a SQL statement. The set of rows the cursor holds is referred to as the active set.
What is a default parameter?
A default parameter (also called an optional parameter or a default argument) is a function parameter that has a default value provided to it. If the user does not supply a value for this parameter, the default value will be used.
What is dynamic cursor?
Dynamic cursors are the opposite of static cursors. Dynamic cursors reflect all changes made to the rows in their result set when scrolling through the cursor.