我有这些疑问
SELECT CA_id, item_id, item_Cant, item_desc FROM items WHERE CA_id = 135
SELECT CA_id, prov_name, unitval, totval FROM provprices WHERE CA_id = 135 AND prov_name = 'SITECH'
我希望加入这两个结果,就像:
item_id - item_Cant - item_desc - unitval - totval
我尝试了不同的形式,但我能得到的最大值是: (如果你注意到第二个表的结果是公开的,应该像第二个图像一样)
SELECT items.item_id,items.item_Cant,items.item_desc,provprices.unitval,provprices.totval
FROM items,provprices
WHERE items.CA_id = provprices.CA_id
AND provprices.prov_name = 'SITECH'
AND items.CA_id = '135'
GROUP BY items.item_id
如果我更改为GROUP BY provprices.unitval
,现在重复的结果是第一个
我希望你能帮助我。感谢
答案 0 :(得分:0)
我不太了解,但试试这个,
您想如何计算单位数和总数
select item_id, item_Cant, item_desc, AVG(unitval), sum(totval)
from (
SELECT CA_id, item_id, item_Cant, item_desc
FROM items
WHERE CA_id = 135
) A
inner join (
SELECT CA_id, prov_name, unitval, totval
FROM provprices
WHERE CA_id = 135 AND prov_name = 'SITECH'
) B ON A.CA_id=B.CA_id
GROUP BY item_id, item_Cant, item_desc