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 ...
Cursor with parameters 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. ...
The syntax for the CURSOR FOR LOOP in Oracle/PLSQL is: FOR record_index in cursor_name LOOP {...statements...} END LOOP; Parameters or Arguments record_index The index of the record. cursor_name The name of the cursor that you wish to fetch records from. statements The statements of ...
--CURSOR FOR LOOP WITH PARAMETERS Declare Cursor c1(Dno number) is select * from emp where deptno = dno; begin for empree in c1(10) loop; dbms_output.put_line(empree.ename); end loop; end; TRIGGERSTrigger is a stored procedure which is called implicitly by oracle engine whenever a ...
baseline_ref_cursor DBMS_SQLTUNE.SQLSET_CURSOR; BEGIN -- create sql_plan_baseline for sql using plan from AWR DBMS_SQLTUNE.CREATE_SQLSET(:ss_name); open baseline_ref_cursor for select VALUE(p) from table(DBMS_SQLTUNE.SELECT_WORKLOAD_REPOSITORY(:b_snap_id, :e_snap_id, ...
如果试图打开一个已经打开的游标,将出错: ORA-06511:PL/SQL:CURSOR ALREADY OPEN 我们可以这样: IF NOT C_NAME%ISOPEN THEN OPEN C_NAME; END IF; 五、从游标中取回数据 FETCH CURSOR_NAME INTO RECOR-LIST; 关闭游标:CLOSE CURSOR_NAME 六、实例: DECLARE MYNAME VARCHAR(22); CURSOR C_NAME IS SELECT ...
('&&plan_hash_value.');baseline_ref_cursor DBMS_SQLTUNE.SQLSET_CURSOR;BEGIN--create sql_plan_baseline for sql using plan from AWRDBMS_SQLTUNE.CREATE_SQLSET(:ss_name);openbaseline_ref_cursorforselectVALUE(p)fromtable(DBMS_SQLTUNE.SELECT_WORKLOAD_REPOSITORY(:b_snap_id, :e_snap_id,'sql_...
from dbms_xplan.display_cursor(sql_id=>'2c1nchvqtjt6s', format=>'+outline'); Plan hash value: 3244120894 --- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | ---
Let us learn the implementation of the PL/ SQL stored procedures with the help of some examples – Let us look at the example that demonstrates how the cursor can be used in PL/ SQL to retrieve the information about a particular entry in the table. Consider that we have a table called ...
. When I click OK on the error, it takes another minute or two before the "spinning wheel" cursor goes away so I can do anything in PL/SQL Developer. The status bar continues to say "Executing..." during this wait.My computer is not affected. I can access anything on my other ...