#Cursors in plsql how to#

Declare Cursor: A cursor is declared by defining the SQL statement that returns a result set.Hence the size of the cursor is limited by the size of this pre-defined area. Oracle DBMS has another predefined area in the main memory Set, within which the cursors are opened. The Data that is stored in the Cursor is called the Active Data Set. Cursors are used when the user needs to update records in a singleton fashion or in a row by row manner, in a database table. The major function of a cursor is to retrieve data, one row at a time, from a result set, unlike the SQL commands which operate on all the rows in the result set at one time. The вЂCursorвЂ™ is the PL/SQL construct that allows the user to name the work area and access the stored information in it. This work area is private to SQLвЂ™s operations. To execute SQL statements, a work area is used by the Oracle engine for its internal processing and storing the information.

#Cursors in plsql how to#

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