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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.
Data Types in SQL - Character CHARACTER or, synonymously, CHAR, for character strings. When this type is to be the declared type of something (e.g., a column), the permissible
At times, Brewbean's has changed the id number for existing products. In the past, they have had to add a new product row with the new id to the BB_PRODUCT table, modify all the co
Cursors The Oracle uses work areas to execute the SQL statements and to store process information. A PL/SQL construct known as the cursor. Let's you assume name a work area and
CURRVAL and NEXTVAL The series is a schema object which generates the sequential numbers. Whenever you form a sequence, you can specify its primary value and an increment. T
Remote Operations: As the illustration shows below, the PL/SQL subprograms can execute the dynamic SQL statements which refer to the objects on a remote database: PROCEDURE
Operators on Tables and Rows Row Extraction TUPLE FROM r, SQL has row subqueries. These are just like scalar subqueries except that they may specify more than one column.
I want to implement heap sort algorithm in pl sql please share the source code for guidance
Keyword and Parameter Description select_statement: This is a query which returns a result set of the rows. Its syntax is such that of select_ into_statement without the IN
write the program for traffic control system with 10 second, 15 secod, and 20 second delay
Cursor Variables Similar to a cursor, cursor variable points to the current row in the result set of a multi-row query. But, dissimilar a cursor, a cursor variable can be opene
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