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Why Use Cursor Variables ?
Primarily, you use the cursor variables to pass the query result sets between the PL/SQL stored subprograms and different clients. Neither PL/SQL nor any of its clients owns a result set; they merely share a pointer to the query work region in which the result set is stored. For instance, Oracle Forms application, an OCI client, and Oracle server can all refer to the same work region.
A query work region remains accessible as long as any cursor variable points to it. Along with, you can pass the value of a cursor variable freely from one scope to other. For illustration, if you pass a host cursor variable to a PL/SQL block embedded in a Pro C program, the work region to which the cursor variable points remains accessible after the block done. If you comprise a PL/SQL engine on the client side, the calls from client to server force no restrictions. For illustration, you can declare a cursor variable on the client side, open & fetch from it on the server side then carry on to fetch from it back on the client side. You can also reduce the network traffic by having a PL/SQL block open (or close) some host cursor variables in a single round trip.
#quesWrite a cursor to open an employee database and fetch the employee record whose age is greater than 45.tion..
How do I display usernames for students from a student table, assigning each student a username initials001 (initials is the actual student initials), and if the students initials
Managing Cursors The PL/SQL uses 2 types of cursors: implicit and explicit. The PL/SQL declares a cursor implicitly for all the SQL data manipulation statements, including th
I need a query for PL/SQL, selecting names with cursor, goes down the list, assigns usernames (initials001) based on initials in the name. If two names have same initials the user
Project Description: I am looking to change FullCalendar to add/delete sql server data when events are removed or dropped from Calendar. Events should only be included by dra
Manipulating Collections Within PL/SQL, the collections add procedural power and flexibility. The biggest benefit is that your program can compute subscripts to process the spec
Recursive Subprograms The recursive subprogram is the one that calls itself. Think of a recursive call as a call to a few other subprograms that does the similar task as your
What is Cursors how to use it in Real time application ?
Using TRIM This process has two forms. The TRIM removes an element from the end of the collection. The TRIM(n) removes the n elements from the end of the collection. For e.g.
Referencing Records Unlike the elements in a collection, that are accessed using subscripts, the fields in a record are accessed by name. To reference an individual field, you
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