查询中的条件操作者 [英] conditional opeartor in a query
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问题描述
在以下查询中,我陷入了如何应用条件运算符的问题.
请帮我...
查询是
Hi,
In the following query, i am stuck how to apply conditional operator.
pls help me out...
The query is
SELECT
NVL ((SELECT maxdrives
FROM T4_child apici
WHERE apici.item_number = b.item_number),
0
) AS drives
DECODE (SIGN ((SELECT COUNT (*)
FROM T1_item ari
WHERE ari.item_number = b. _item_number
AND ari.master_id =
(SELECT master_id
FROM T2_master
WHERE rule_name = b.rule_name
AND delete_flag = ''0'')
AND ari.delete_flag = ''0''
AND ari.item_code = ''Voy'')
),
1, 1,
DECODE (SIGN ((SELECT COUNT (*)
FROM T3_item aci
WHERE aci.box_id = b.box_id
AND aci.slot_number > 0
AND item_code = ''LASH'')
),
1, 1,
0
)
) AS voy,
FROM T5_box b, T6_Si p
WHERE b.order_id = p.order_id
在上面的查询中,如果Dirves = 60,我想根据条件执行以下查询
In the above query If Dirves =60 i want to execute following queries based on the condition
DECODE (SIGN ((SELECT COUNT (*)
FROM T1_item ari
WHERE ari.item_number = b. _item_number
AND ari.master_id =
(SELECT master_id
FROM T2_master
WHERE rule_name = b.rule_name
AND delete_flag = ''0'')
AND ari.delete_flag = ''0''
AND ari.item_code = ''Voy'')
),
1, 1,
其他
else
DECODE (SIGN ((SELECT COUNT (*)
FROM T1_item ari
WHERE ari.item_number = b. _item_number
AND ari.master_id =
(SELECT master_id
FROM T2_master
WHERE rule_name = b.rule_name
AND delete_flag = ''0'')
AND ari.delete_flag = ''0''
AND ari.item_code = ''Voy'')
),
1, 1,
DECODE (SIGN ((SELECT COUNT (*)
FROM T3_item aci
WHERE aci.box_id = b.box_id
AND aci.slot_number > 0
AND item_code = ''LASH'')
),
1, 1,
0
)
) AS voy,
请让我知道如何在查询中应用条件运算符.
TIA.
Pls let me know how to apply conditional operator, in the query.
TIA.
推荐答案
您必须编写动态SQL语句才能做到这一点.
You will have to write Dynamic SQL Statements to do this.
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