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发帖数: 579 | 1 【 以下文字转载自 Database 讨论区 】
发信人: light009 (light009), 信区: Database
标 题: SQL combine two tables into one table and add a new column
发信站: BBS 未名空间站 (Thu May 8 14:54:50 2014, 美东)
I need to add a column with an int value to the result from a subquery on
SQL.
It is Netezza SQL.
SELECT *
FROM
(
SELECT *
FROM table1
JOIN
table2
ON table1.id1 = table2.id1
GROUP BY table1.id2, table2.id3
) AS tt_a # here, I need to add a new column to tt, call it as top_id
and also assign an int value to it, such as 80
FROM
(
SELECT *
FROM table1
JOIN
table3
ON table1.id1 = table3.id1
GROUP BY table3.id2, table3.id3
) AS tt_b # here, I need to add a new column to tt, call it as top_id
and also assign an int value to it, such as 81
GROUP BY top_id, id2, id3
I em new to SQL.
Any help would be appreciated. | h**********c
发帖数: 4120 | 2 study study relational algrebra
first chapters in major texts
go SQL first is not considered a good approach.
Put your enligsh/chinese requirement text below. I try to do some thing
after read it. |
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