FOR employee_rec in c1 LOOP total_val := total_val + employee_rec.monthly_income; END LOOP; RETURN total_val; END; In this example, we've created a cursor called c1. TheCURSOR FOR Loopwill terminate after all records have been fetched from the cursor c1. 译:在这个示例中,我们建立了...
/* Open up a cursor for loop, also selecting * the "p" function which will write rows to * t2 for every row fetched from t1. */ FOR crec IN (Select tcol, p(tcol) FROM t1) LOOP -- Break out of the loop immediately EXIT; END LOOP; END; / Select COUNT(*) FROM t2; 注意:%...
Unlike Numeric For Loop with Cursor For Loop we don’t have minimum or maximum range which will decide the number of execution. So how many times will this loop execute? This loop will execute for each row returned by the specified cursor and it will terminate either when there is no row...
Example:使用游标For循环打印输出员工信息: DECLARE CURSOR emp_cursor IS SELECT empno,ename,job FROM emp; BEGIN FOR emp_record IN emp_cursor LOOP DBMS_OUTPUT.PUT_LINE('员工号:'||emp_record.empno||'员工姓名'||emp_record.ename||'员工职位'||emp_record.job); END LOOP; END; 这里游标FOR循环...
/* Open up a cursor for loop, also selecting * the "p" function which will write rows to * t2 for every row fetched from t1. */ FOR crec IN (Select tcol, p(tcol) FROM t1) LOOP -- Break out of the loop immediately EXIT; ...
CREATE OR REPLACE PROCEDURE p_test_emp is CURSOR c1 is select empno, ename from emp;t_c1 c1%rowtype;err exception;begin open c1;loop FETCH c1 INTO t_c1;if (c1%found) then insert into emp_test (empno, ename) values (t_c1.empno, t_c1.ename);commit;else raise err;(...
and object_name=aIndexName;vSqlStr:='SELECT rows_per_block, count(*) blocks FROM (SELECT /*+ cursor_sharing_exact '||'dynamic_sampling(0) no_monitoring no_expand index_ffs('||aTableName||','||aIndexName||') noparallel_index('||aTableName||','||aIndexName||') */ sys_op_lbi...
END LOOP; END; 中的CURSOR cur IS得到的是什么? 用for in 能够得到什么? 答: AI检测代码解析 CURSOR cur IS是定义一个游标,然后把游标里定义的查询语句存储到游标里因为查询语句查出来的数据往往是几条记录但是你用的时候缺只能一条一条取出来用这时游标的好处就体现出来了游标存储时 存的是几条记录但是读取...
Error: Cursor is null Description The cursor passed as a parameter to one of the security provider methods is null. Cause A null cursor is not supported. Action Modify the code to pass a non-null cursor. BEA-090250 Error: Cursor not found cursorName Description A cursor passed to the ...
OPEN_CURSOR PARSE BIND_VARIABLE EXECUTE FETCH_ROWS CLOSE_CURSOR 使用DBMS_SQL执行DML语句 删除行的例子 CREATEORREPLACEFUNCTIONdelete_all_rows(table_nameVARCHAR2)RETURNNUMBERIScsr_idINTEGER;rows_delNUMBER;BEGINcsr_id:=DBMS_SQL.OPEN_CURSOR;DBMS_SQL.PARSE(csr_id,'DELETE FROM '||table_name,DBMS_SQL...