1
所以我创建了一对光标来存储正在加载到表中的数据。数据一次加载一次,我需要对整个数据集进行验证,而不仅仅是单个记录。所以会有像这样的数据(但它只会被加载个体而不是整体)空值加载到光标?
form_no | type
---------------
5155-55 | -1
5155-55 | -1
5155-55 | 2
5155-55 | 1
|
4568-98 | -1
4568-98 | -1
4568-98 | -1
4568-98 | 2
4568-98 | 1
3302-48 | 1
3302-45 | 2
3302-45 | -1
所以然后游标采取总和或每种类型,然后配对它与一个独特的form_no。然后,在底部它被检查,以确保始终有一个1和-1与每个form_no(即form_no 5155-55具有至少一个1型和一种类型-1)
DECLARE
error VARCHAR2(1) := 'N';
CURSOR XXX IS
SELECT form_no, sum(type) as sum_type_neg
FROM my_table
WHERE type = -1
GROUP BY form_no;
CURSOR YYY IS
SELECT form_no, sum(type) as sum_type_pos
FROM my_table
WHERE type = 1
GROUP BY form_no;
CURSOR ZZZ(xx_form_no VARCHAR2, yy_form_no VARCHAR2) IS
SELECT form_no
FROM my_table
WHERE form_no = xx_form_no
AND form_no = vv_form_no
GROUP BY form_no;
x_form XXX%ROWTYPE;
y_form YYY%ROWTYPE;
ZZZRow ZZZ%ROWTYPE;
BEGIN
OPEN XXX;
LOOP
FETCH XXX
INTO x_form;
EXIT WHEN XXX%NOTFOUND;
OPEN YYY;
LOOP
FETCH YYY
INTO y_form;
EXIT WHEN YYY%NOTFOUND;
OPEN ZZZ(x_form.form_no, y_form.form_no);
LOOP
FETCH ZZZ
INTO ZZZRow;
EXIT WHEN ZZZ%NOTFOUND;
dbms_output.put_line('Distinct: ' || x_form.form_no);
dbms_output.put_line('SUM x: ' || x_form.sum_type_neg);
dbms_output.put_line('SUM y: ' || y_form.sum_type_pos);
dbms_output.put_line('----------------------------');
END LOOP;
CLOSE ZZZ;
END LOOP;
CLOSE YYY;
END LOOP;
CLOSE XXX;
IF x_form.sum_type_neg = O or y_form.sum_type_pos = 0 THEN
v_error_in_process := 'Y';
dbms_output.put_line('ERROR MESSAGE');
ELSE
dbms_output.put_line('GREATE JOB');
END IF;
END;
输出将是这样
Distinct : 5155-55
SUM x: -2
SUM y: 1
----------------------------
Distinct: 4568-98
SUM x: -3
SUM y: 1
----------------------------
Distinct: 3302-48
SUM x: -1
SUM y: 1
----------------------------
GREAT JOB!
它的工作原理除了当form_no不具有-1或1
例输入伟大:
form_no | type
---------------
5155-55 | -1
5155-55 | -1
5155-55 | 2
5155-55 | 1
|
4568-98 | -1
4568-98 | -1
4568-98 | -1
4568-98 | 2
4568-98 | 1
3302-48 | 1
3302-48 | 2
注意form_no 3302-48没有-1。所以,那么输出会是这样
Distinct: 5155-55
SUM x: -2
SUM y: 1
----------------------------
Distinct: 4568-98
SUM x: -3
SUM y: 1
----------------------------
GREAT JOB!
除了我希望它是这样
Distinct: 5155-55
SUM x: -2
SUM y: 1
----------------------------
Distinct: 4568-98
SUM x: -3
SUM y: 1
----------------------------
Distinct: 3302-48
SUM x: 0
SUM y: 1
----------------------------
ERROR MESSAGE
谁能告诉我怎么去这样做。我不确定一个游标是否可以接受空值(即,当没有1或-1时,则不会有任何内容加载到游标中)。