我有两个表,ta 和 tb:
I have two tables, ta and tb:
他:
key col1
--------
k1 a
k2 c
待定:
key col2
-------
k2 cc
k3 ee
他们通过钥匙"连接.我想知道我怎样才能得到一张桌子,tc,比如:
They connected by "key". I want to know how can I get a table, tc, like:
key col1 col2
-------------
k1 a
k2 c cc
k3 ee
有没有简单的方法而不是插入每条记录?它们是一百万条表记录,所以我需要一种有效的方法.
Is there a easy method instead of inserting every record? They are one million records of tables so I need an effective way.
Make a VIEW两张桌子.编写一个 SELECT ... JOIN
语句,为您提供所需的结果,然后将其用作 VIEW 的基础.
Make a VIEW of the two tables. Write a SELECT ... JOIN
statement that gives you the result you want, and then use that as the base for a VIEW.
示例:
CREATE VIEW
database.viewname
AS
SELECT
ta.key,
ta.col1,
tb.col2
FROM
ta
LEFT JOIN
tb
USING(key)
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