[英]Oracle SQL Dynamic Query
我的数据库中有2个表:
我正在尝试创建一个应作为变量参数“ id3 ”使用的查询,例如-
Q(z0)应该产生
提前致谢!
Oracle查询可以采用两种形式的参数,一种是ANSI sql绑定[?的信息],另一种是Oracle样式绑定[以:1的形式]。
因此,您的查询可以是:
Select * from table1 a, table2 b where a.id1 = b.id1
and a.id2 = b.id2 and id3 = :1
如果我正确理解你的话
SELECT * FROM TAB1 I
JOIN TAB2 II ON I.id1 = II.id1 and I.id2 = II.id2
WHERE I.id3 = 'z0'
应该产生所需的结果,如果TAB2不完整,则可能需要“ LEFT OUTER JOIN”。
因此,假设已知“ A”,“ B”,“ C”,则查询为
With extra_cols as(
SELECT * FROM (
SELECT * FROM Table2 WHERE id1 = (
SELECT id1 FROM TABLE1 WHERE id3 = 'z0'
)
AND id2 = (
SELECT id2 FROM TABLE1 WHERE id3 = 'z0'
)
)
PIVOT (STR(VALUE_1) for FIXED_COL in ('A','B','C'))
)
SELECT * from table1 left join extra_cols on table1.id1 = extra_cols.id1 AND table1.id2 = extra_cols.id2
WHERE TABLE1.id3 = 'z0'
可以从中提取“ A”,“ B”,“ C”字符串
SELECT FIXED_COL AS Names FROM Table2 WHERE Table2.id1=(SELECT id1 FROM TABLE1 WHERE id3 = 'z0') AND Table2.id2=(SELECT id2 FROM TABLE1 WHERE id3 = 'z0')
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