What is the difference between Plsql cursor and Plsql ref cursor?

What is the difference between Plsql cursor and Plsql 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.

Do I need to close Sys_refcursor?

Hence you close a ref cursor after you fetch from it. If you lose your result set — that indicates you are not done with the ref cursor. just treat a ref cursor as you would any other cursor, close it after you are finished with it.

What is Instr in Plsql?

The PLSQL INSTR function is used for returning the location of a substring in a string. The PLSQL INSTR function searches a string for a substring specified by the user using characters and returns the position in the string that is the first character of a specified occurrence of the substring.

How do I use the Instr function?

InStr Function

  1. Returns a Variant (Long) specifying the position of the first occurrence of one string within another.
  2. Syntax.
  3. InStr ([start, ] string1, string2 [, compare ] )
  4. The InStr function syntax has these arguments:
  5. Settings.
  6. The compare argument settings are:
  7. Return Values.
  8. Remarks.

What is collection in Oracle PL SQL?

A collection is an ordered group of elements having the same data type. Each element is identified by a unique subscript that represents its position in the collection. PL/SQL provides three collection types − Index-by tables or Associative array. Nested table.

How do you create a cursor in SQL?

– Most Common SQL Server Cursor Syntax – SQL Server Cursor as a Variable – SQL Server Cursor as Output of a Stored Procedure – SQL Server Cursor Current Of Example – SQL Server Cursor Alternative with a WHILE Loop

How to call Oracle stored procedure which returns REF CURSOR?

Returning REF CURSORs from PL/SQL : Functions,Procedures and Implicit Statement Results

  • Complex Recordsets
  • Dynamic SQL Enhancements in Oracle 11g
  • Implicit Statement Results in Oracle Database 12c Release 1 (12.1)

    • How to create cursor in SQL Server with example?

    We have first declared three variables that will hold data from the cursor temporarily.

  • Then we have declared a temp variable that will hold cursor result set data.
  • Then we have declared a cursor for the AutoId,FirstName,LastName columns from the PersonalDetails table.
  • Then we have opened the cursor

    • What is REF CURSOR in Oracle?

    – First, declare an updatable cursor that updates credits of the customers whose credits are greater than zero. – Next, loop over the rows in the cursors. – Then, get the number of orders for each customer. – After that, assign the credit increment based on the order count. – Finally, update the credit of the customer.