What is weak ref cursor in Oracle?
PL/SQL Weak Ref Cursor is the alternative way of fetching data of different datatypes. As weak ref cursor doesn’t have a fixed return type thus there is no need of creating a separate record datatype.
Why do we use ref cursor 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.
What is ref cursor in Plsql?
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.
Why ref cursor is used in PL SQL?
What is the difference between Plsql cursor and Plsql ref cursor?
The ref cursor can be anything. Another difference is a ref cursor can be returned to a client. a plsql “cursor cursor” cannot be returned to a client. Another difference is a ref cursor can be passed from subroutine to subroutine — a cursor cannot be.
When should we use ref cursor in Oracle?
What is difference between cursor and bulk collect in Oracle?
Cursor is storage area which stores the queried results whereas bulk collect will get bulk amount of data from cursor and insert into some cursor variables.
What is static and dynamic cursor in Oracle?
A static cursor supports both Relative and Absolute Positioning whereas a Dynamic Cursor supports only Relative Positioning. •A Static Cursor can be used for Bookmarking purposes as the data returned is static whereas a Dynamic Cursor can’t be used for the same. Follow this answer to receive notifications.
What are implicit cursors?
An implicit cursor has attributes that return information about the most recently run SELECT or DML statement that is not associated with a named cursor. Note: You can use cursor attributes only in procedural statements, not in SQL statements.
What is the difference between cursor and collection?
A cursor is a compiled SQL program. A cursor variable (in PL/SQL for example) is a pointer/handle for this cursor program in server memory (Shared Pool in the SGA). A collection is a non-scalar/array data structure. Neither implements business logic.
What is the difference between cursor and loop?
Cursors in sql server allow you to fetch a set of data, loop through each record, and modify the values as necessary; then, you can easily assign these values to variables and perform processing on these values. While loop also same as cursor to fetch set of data and process each row in sql server.