This Oracle tutorial explains how todeclare a cursorin Oracle/PLSQL with syntax and examples. Description A cursor is a SELECT statement that is defined within thedeclarationsection of your PLSQL code. We'll tak
(1)If CURSOR_SPACE_FOR_TIMEis set to false (the default), then a cursor can be deallocated from the library cache regardless ofwhether application cursors associated with its SQL statement are this case, Oracle Database must verify that the cursor containing the SQLstatement is in the library...
A cursor is a SELECT statement that is defined within the declaration section of your PLSQL code. We'll take a look at three different syntaxes for cursors. Cursor without parameters (simplest) The basic syntax for a cursor without parameters is: CURSOR cursor_name IS SELECT_statement; For ...
OPENcursor_name;Code language:PostgreSQL SQL dialect and PL/pgSQL(pgsql) In this syntax,cursor_nameis the name of the cursor you declare in the declaration section. When you open a cursor, Oracle parses the query, binds variables, and executes the associated SQL statement. Oracle also determ...
The following illustrates the syntax of the cursor FOR LOOP statement: FOR record IN cursor_name LOOP process_record_statements; END LOOP; Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) 1) record The record is the name of the index that the cursor FOR LOOP statement declares im...
Oracle里的cursor分为两种:一种是shared cursor,一种是session cursor。 1.1 Shared cursor 说明 sharedcursor就是指缓存在librarycache(SGA下的Shared Pool)里的一种library cache object,说白了就是指缓存在library cache里的sql和匿名pl/sql。 它们是Oracle缓存在librarycache中的几十种librarycache object之一,它所...
This Oracle tutorial explains how to use the CURSOR FOR LOOP in Oracle with syntax and examples. The syntax for the CURSOR FOR Loop in Oracle / PLSQL is:
Oracle里的cursor分为两种:一种是shared cursor,一种是session cursor。 1.1 Shared cursor 说明 sharedcursor就是指缓存在librarycache(SGA下的Shared Pool)里的一种library cache object,说白了就是指缓存在library cache里的sql和匿名pl/sql。 它们是Oracle缓存在librarycache中的几十种librarycache object之一,它所...
Oracle里的cursor分为两种:一种是shared cursor,一种是session cursor。 1.1 Shared cursor 说明 sharedcursor就是指缓存在librarycache(SGA下的Shared Pool)里的一种library cache object,说白了就是指缓存在library cache里的sql和匿名pl/sql。 它们是Oracle缓存在librarycache中的几十种librarycache object之一,它所...
For implicit cursors, the syntax is always sql%variable_name. The last variable, %ROWCOUNT, is a regular number variable. The first three are Boolean variables that return a logical TRUE or FALSE. They can be used together with other logical expressions. ...