As we get more complicated, we can declare cursors with parameters. Syntax The syntax for acursor with parametersin Oracle/PLSQL is: CURSOR cursor_name (parameter_list) IS SELECT_statement; Example For example, you could define a cursor called c2 as below. ...
Oracle Database need not verify thata cursor is in the cache because it cannot be deallocated while an applicationcursor associated with it is open.
IF emp_record.department_id = 80 THEN ... statement 1 END LOOP ; 使用Subqueries 来实现 FOR emp_record IN ( SELECT last_name , department_id FROM employees ) LOOP IF emp_record.department_id = 80 THEN END LOOP ; ( 利用子查询也可以, 这样就不需要定义游标了 ) Cursor with parameters CU...
Cursor with parameters The basic syntax for a cursor with parameters is: CURSOR cursor_name (parameter_list) IS SELECT_statement; For example, you could define a cursor called c2 as below. CURSOR c2 (subject_id_in IN varchar2) IS SELECT course_number from courses_tbl where subject_id = s...
SPACE_FOR_TIMEis set to true, then a cursorcan be deallocated only when all application cursors associated with itsstatement are closed. In this case, Oracle Database need not verify thata cursor is in the cache because it cannot be deallocated while an applicationcursor associated with it is...
Only allows statements with identical text to share the same cursor. --只有SQL 语句完全相同的情况下,才会使用相同的cursor,即执行计划。 Notes: (1)If you set CURSOR_SHARING, then Oracle recommends the FORCE setting unless you are in a DSS environment. FORCE limits the growth of child cursors ...
If the matching key has duplicate values, the first data item in the set of duplicates is returned. If this method fails for any reason, the position of the cursor will be unchanged. Parameters: key - the key used as input. It must be initialized with a non-null byte array by the ...
Oracle Cursor MCQs: This section contains multiple-choice questions and answers on Cursor in Oracle. Submitted by Anushree Goswami, on June 13, 2022 1. ___ statements such as INSERT, UPDATE, DELETE or MERGE are processed with the use of cursors.SELECT DML Both A and B None of the above...
With a CursorSpecification, an application can specify whether Oracle OLAP calculates the extent of a Cursor or the starting and ending positions of the current value of a child Cursor in the parent Cursor. If a CursorSpecification specifies those calculations, then the application can retrieve ...
If the key already appears in the database and duplicates are supported, the new data value is inserted at the correct sorted location. If the key already appears in the database and duplicates are not supported, the data associated with the key will be replaced. Parameters: key - the key...