Question

我想在同一个查询中多次引用一个临时表。由于临时表的问题我不能这样做：

http://dev.mysql.com/doc/refman/5.7/en/temporary-table-problems.html

所以要修复我正在创建临时表的重复项：

CREATE TEMPORARY TABLE IF NOT EXISTS earnings_temp_one AS (SELECT * FROM earnings WHERE earning_account_id = ?);
CREATE TEMPORARY TABLE IF NOT EXISTS earnings_temp_two AS (SELECT * FROM earnings WHERE earning_account_id = ?);
CREATE TEMPORARY TABLE IF NOT EXISTS earnings_temp_three AS (SELECT * FROM earnings WHERE earning_account_id = ?);

但这需要我查询大量的桌面收益3次，这在某种程度上违背了目的。

我有没有办法以不同的名称复制临时表？

然后我就可以在大桌子上运行一次查询。

或许可以修复临时表问题，不需要我创建重复项？

Answer 1

好的，我解决了它：

CREATE TEMPORARY TABLE IF NOT EXISTS earnings_temp_one AS (SELECT * FROM earnings WHERE earning_account_id = ?);
CREATE TEMPORARY TABLE IF NOT EXISTS earnings_temp_two AS (SELECT * FROM earnings_temp_one);
CREATE TEMPORARY TABLE IF NOT EXISTS earnings_temp_three AS (SELECT * FROM earnings_temp_one);

重复的临时表MySQL

1 个答案: